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2016-05-26Merge tag 'dax-misc-for-4.7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull misc DAX updates from Vishal Verma: "DAX error handling for 4.7 - Until now, dax has been disabled if media errors were found on any device. This enables the use of DAX in the presence of these errors by making all sector-aligned zeroing go through the driver. - The driver (already) has the ability to clear errors on writes that are sent through the block layer using 'DSMs' defined in ACPI 6.1. Other misc changes: - When mounting DAX filesystems, check to make sure the partition is page aligned. This is a requirement for DAX, and previously, we allowed such unaligned mounts to succeed, but subsequent reads/writes would fail. - Misc/cleanup fixes from Jan that remove unused code from DAX related to zeroing, writeback, and some size checks" * tag 'dax-misc-for-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: dax: fix a comment in dax_zero_page_range and dax_truncate_page dax: for truncate/hole-punch, do zeroing through the driver if possible dax: export a low-level __dax_zero_page_range helper dax: use sb_issue_zerout instead of calling dax_clear_sectors dax: enable dax in the presence of known media errors (badblocks) dax: fallback from pmd to pte on error block: Update blkdev_dax_capable() for consistency xfs: Add alignment check for DAX mount ext2: Add alignment check for DAX mount ext4: Add alignment check for DAX mount block: Add bdev_dax_supported() for dax mount checks block: Add vfs_msg() interface dax: Remove redundant inode size checks dax: Remove pointless writeback from dax_do_io() dax: Remove zeroing from dax_io() dax: Remove dead zeroing code from fault handlers ext2: Avoid DAX zeroing to corrupt data ext2: Fix block zeroing in ext2_get_blocks() for DAX dax: Remove complete_unwritten argument DAX: move RADIX_DAX_ definitions to dax.c
2016-05-20Merge tag 'tty-4.7-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty and serial driver updates from Greg KH: "Here's the large TTY and Serial driver update for 4.7-rc1. A few new serial drivers are added here, and Peter has fixed a bunch of long-standing bugs in the tty layer and serial drivers as normal. Full details in the shortlog. All of these have been in linux-next for a while with no reported issues" * tag 'tty-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (88 commits) MAINTAINERS: 8250: remove website reference serial: core: Fix port mutex assert if lockdep disabled serial: 8250_dw: fix wrong logic in dw8250_check_lcr() tty: vt, finish looping on duplicate tty: vt, return error when con_startup fails QE-UART: add "fsl,t1040-ucc-uart" to of_device_id serial: mctrl_gpio: Drop support for out1-gpios and out2-gpios serial: 8250dw: Add device HID for future AMD UART controller Fix OpenSSH pty regression on close serial: mctrl_gpio: add IRQ locking serial: 8250: Integrate Fintek into 8250_base serial: mps2-uart: add support for early console serial: mps2-uart: add MPS2 UART driver dt-bindings: document the MPS2 UART bindings serial: sirf: Use generic uart-has-rtscts DT property serial: sirf: Introduce helper variable struct device_node *np serial: mxs-auart: Use generic uart-has-rtscts DT property serial: imx: Use generic uart-has-rtscts DT property doc: DT: Add Generic Serial Device Tree Bindings serial: 8250: of: Make tegra_serial_handle_break() static ...
2016-05-19Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM updates from Paolo Bonzini: "Small release overall. x86: - miscellaneous fixes - AVIC support (local APIC virtualization, AMD version) s390: - polling for interrupts after a VCPU goes to halted state is now enabled for s390 - use hardware provided information about facility bits that do not need any hypervisor activity, and other fixes for cpu models and facilities - improve perf output - floating interrupt controller improvements. MIPS: - miscellaneous fixes PPC: - bugfixes only ARM: - 16K page size support - generic firmware probing layer for timer and GIC Christoffer Dall (KVM-ARM maintainer) says: "There are a few changes in this pull request touching things outside KVM, but they should all carry the necessary acks and it made the merge process much easier to do it this way." though actually the irqchip maintainers' acks didn't make it into the patches. Marc Zyngier, who is both irqchip and KVM-ARM maintainer, later acked at http://mid.gmane.org/573351D1.4060303@arm.com ('more formally and for documentation purposes')" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (82 commits) KVM: MTRR: remove MSR 0x2f8 KVM: x86: make hwapic_isr_update and hwapic_irr_update look the same svm: Manage vcpu load/unload when enable AVIC svm: Do not intercept CR8 when enable AVIC svm: Do not expose x2APIC when enable AVIC KVM: x86: Introducing kvm_x86_ops.apicv_post_state_restore svm: Add VMEXIT handlers for AVIC svm: Add interrupt injection via AVIC KVM: x86: Detect and Initialize AVIC support svm: Introduce new AVIC VMCB registers KVM: split kvm_vcpu_wake_up from kvm_vcpu_kick KVM: x86: Introducing kvm_x86_ops VCPU blocking/unblocking hooks KVM: x86: Introducing kvm_x86_ops VM init/destroy hooks KVM: x86: Rename kvm_apic_get_reg to kvm_lapic_get_reg KVM: x86: Misc LAPIC changes to expose helper functions KVM: shrink halt polling even more for invalid wakeups KVM: s390: set halt polling to 80 microseconds KVM: halt_polling: provide a way to qualify wakeups during poll KVM: PPC: Book3S HV: Re-enable XICS fast path for irqfd-generated interrupts kvm: Conditionally register IRQ bypass consumer ...
2016-05-18Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds
Pull SCSI updates from James Bottomley: "First round of SCSI updates for the 4.6+ merge window. This batch includes the usual quota of driver updates (bnx2fc, mp3sas, hpsa, ncr5380, lpfc, hisi_sas, snic, aacraid, megaraid_sas). There's also a multiqueue update for scsi_debug, assorted bug fixes and a few other minor updates (refactor of scsi_sg_pools into generic code, alua and VPD updates, and struct timeval conversions)" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (138 commits) mpt3sas: Used "synchronize_irq()"API to synchronize timed-out IO & TMs mpt3sas: Set maximum transfer length per IO to 4MB for VDs mpt3sas: Updating mpt3sas driver version to 13.100.00.00 mpt3sas: Fix initial Reference tag field for 4K PI drives. mpt3sas: Handle active cable exception event mpt3sas: Update MPI header to 2.00.42 Revert "lpfc: Delete unnecessary checks before the function call mempool_destroy" eata_pio: missing break statement hpsa: Fix type ZBC conditional checks scsi_lib: Decode T10 vendor IDs scsi_dh_alua: do not fail for unknown VPD identification scsi_debug: use locally assigned naa scsi_debug: uuid for lu name scsi_debug: vpd and mode page work scsi_debug: add multiple queue support bfa: fix bfa_fcb_itnim_alloc() error handling megaraid_sas: Downgrade two success messages to info cxlflash: Fix to resolve dead-lock during EEH recovery scsi_debug: rework resp_report_luns scsi_debug: use pdt constants ...
2016-05-18Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Martin Schwidefsky: "The s390 patches for the 4.7 merge window have the usual bug fixes and cleanups, and the following new features: - An interface for dasd driver to query if a volume is online to another operating system - A new ioctl for the dasd driver to verify the format for a range of tracks - Following the example of x86 the struct fpu is now allocated with the task_struct - The 'report_error' interface for the PCI bus to send an adapter-error notification from user space to the service element of the machine" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (29 commits) s390/vmem: remove unused function parameter s390/vmem: fix identity mapping s390: add missing include statements s390: add missing declarations s390: make couple of variables and functions static s390/cache: remove superfluous locking s390/cpuinfo: simplify locking and skip offline cpus early s390/3270: hangup the 3270 tty after a disconnect s390/3270: handle reconnect of a tty with a different size s390/3270: avoid endless I/O loop with disconnected 3270 terminals s390/3270: fix garbled output on 3270 tty view s390/3270: fix view reference counting s390/3270: add missing tty_kref_put s390/dumpstack: implement and use return_address() s390/cpum_sf: Remove superfluous SMP function call s390/cpum_cf: Remove superfluous SMP function call s390/Kconfig: make z196 the default processor type s390/sclp: avoid compile warning in sclp_pci_report s390/fpu: allocate 'struct fpu' with the task_struct s390/crypto: cleanup and move the header with the cpacf definitions ...
2016-05-18dax: enable dax in the presence of known media errors (badblocks)Dan Williams
1/ If a mapping overlaps a bad sector fail the request. 2/ Do not opportunistically report more dax-capable capacity than is requested when errors present. Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com> [vishal: fix a conflict with system RAM collision patches] [vishal: add a 'size' parameter to ->direct_access] [vishal: fix a conflict with DAX alignment check patches] Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
2016-05-10s390: make couple of variables and functions staticHeiko Carstens
copy_oldmem_user() and ap_jumptable are private to the files they are being used in. Therefore make them static. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-05-10s390/3270: hangup the 3270 tty after a disconnectMartin Schwidefsky
The disconnect and later reconnect of a 3270 terminal does not do a tty hangup. The current session is resumed which is a security issue. Do a tty hangup after a unit check has been received. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-05-10s390/3270: handle reconnect of a tty with a different sizeMartin Schwidefsky
If an existing 3270 terminal disconnects and reconnects with a different size, the 3270 driver still works with the old size. If the new dimensions are larger the output merely looks funny, if the new dimensions are smaller the terminal is unusable. To fix this restart the size detection after a unit check has been received. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-05-09s390/sclp: Add hmfai fieldAlexander Yarygin
Let's add hypervisor-managed facility-apportionment indications field to SCLP structs. KVM will use it to reduce maintenance cost of Non-Hypervisor-Managed facility bits. Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Eric Farman <farman@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-05-09Merge 4.6-rc7 into tty-nextGreg Kroah-Hartman
We want the pty fixes in here as well so that patches can build on it. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-04drivers: fix dev->trans_start removal falloutFlorian Westphal
kbuild test robot reported a build failure on s390. While at it, also fix missing conversion in the tilera driver. Fixes: 9b36627acecd5792 ("net: remove dev->trans_start") Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-04treewide: replace dev->trans_start update with helperFlorian Westphal
Replace all trans_start updates with netif_trans_update helper. change was done via spatch: struct net_device *d; @@ - d->trans_start = jiffies + netif_trans_update(d) Compile tested only. Cc: user-mode-linux-devel@lists.sourceforge.net Cc: linux-xtensa@linux-xtensa.org Cc: linux1394-devel@lists.sourceforge.net Cc: linux-rdma@vger.kernel.org Cc: netdev@vger.kernel.org Cc: MPT-FusionLinux.pdl@broadcom.com Cc: linux-scsi@vger.kernel.org Cc: linux-can@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linux-omap@vger.kernel.org Cc: linux-hams@vger.kernel.org Cc: linux-usb@vger.kernel.org Cc: linux-wireless@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: devel@driverdev.osuosl.org Cc: b.a.t.m.a.n@lists.open-mesh.org Cc: linux-bluetooth@vger.kernel.org Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Mugunthan V N <mugunthanvnm@ti.com> Acked-by: Antonio Quartulli <a@unstable.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-04s390/3270: avoid endless I/O loop with disconnected 3270 terminalsMartin Schwidefsky
If a 3270 terminal is disconnected while the tty view is active the 3270 driver goes into an endless loop of failed I/O requests until the terminal is connected again. Add code to the raw3270 interrupt handler to check for unit checks due to failed I/O requests and put the device to sleep with the RAW3270_FLAGS_BUSY flag until a unsolicited device end interrupt indicates that the device can be used again. while we are at it simplify the 3270 irq handling and remove unnecessary code. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-05-04s390/3270: fix garbled output on 3270 tty viewMartin Schwidefsky
The tty3270_update function tries to optimize the output stream by skipping the TO_SBA command to position the output offset if the TO_RA command of the previous line ended at the same offset. But some lines do not have the TO_RA at the end, namely those with a length equal to the number of columns. Make sure there is a TO_RA at the end of the previous line to avoid funny looking output. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-05-04s390/3270: fix view reference countingMartin Schwidefsky
The tty3270_close function set tty->driver_data to NULL after the open count dropped to zero but tty3270_cleanup still needs the pointer to the tty3270 view to drop the reference count. Move the clearing of tty->driver_data to tty3270_cleanup and drop the unnecessary tty_port_tty_set calls in tty3270_install. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-05-04s390/3270: add missing tty_kref_putMartin Schwidefsky
The tty3270_resize_work functions acquires a reference to the tty to call tty_do_resize but fails to release the reference again. Add the missing tty_kref_put. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-30tty: Replace ASYNC_INITIALIZED bit and update atomicallyPeter Hurley
Replace ASYNC_INITIALIZED bit in the tty_port::flags field with TTY_PORT_INITIALIZED bit in the tty_port::iflags field. Introduce helpers tty_port_set_initialized() and tty_port_initialized() to abstract atomic bit ops. Note: the transforms for test_and_set_bit() and test_and_clear_bit() are unnecessary as the state transitions are already mutually exclusive; the tty lock prevents concurrent open/close/hangup. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-30tty: Replace ASYNC_SUSPENDED bit and update atomicallyPeter Hurley
Replace ASYNC_SUSPENDED bit in the tty_port::flags field with TTY_PORT_SUSPENDED bit in the tty_port::iflags field. Introduce helpers tty_port_set_suspended() and tty_port_suspended() to abstract atomic bit ops. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-30tty: Replace TTY_IO_ERROR bit tests with tty_io_error()Peter Hurley
Abstract TTY_IO_ERROR status test treewide with tty_io_error(). NB: tty->flags uses atomic bit ops; replace non-atomic bit test with test_bit(). Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-27s390/sclp_ctl: fix potential information leak with /dev/sclpMartin Schwidefsky
The sclp_ctl_ioctl_sccb function uses two copy_from_user calls to retrieve the sclp request from user space. The first copy_from_user fetches the length of the request which is stored in the first two bytes of the request. The second copy_from_user gets the complete sclp request, but this copies the length field a second time. A malicious user may have changed the length in the meantime. Reported-by: Pengfei Wang <wpengfeinudt@gmail.com> Reviewed-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-21s390/sclp: avoid compile warning in sclp_pci_reportMartin Schwidefsky
Fix the initialization of a local variable to remove this warning: All warnings (new ones prefixed by >>): drivers/s390/char/sclp_pci.c: In function 'sclp_pci_report': >> drivers/s390/char/sclp_pci.c:127:9: warning: missing braces around initializer [-Wmissing-braces] struct sclp_req req = {0}; ^ drivers/s390/char/sclp_pci.c:127:9: warning: (near initialization for 'req.list') [-Wmissing-braces] Fixes: 12283a4035691697 "s390/sclp: add error notification command" Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-15zfcp: Revert to original scanning behaviourHannes Reinecke
zfcp has its own mechanism for selective scanning, so revert to the original scanning behaviour to not confuse users. Fixes: 4e91e876e9b8b6eb4255aa0d690778a89d3f1d28 Suggested-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-15s390/dasd: Add new ioctl BIODASDCHECKFMTJan Höppner
Implement new DASD IOCTL BIODASDCHECKFMT to check a range of tracks on a DASD volume for correct formatting. The following characteristics are checked: - Block size - ECKD key length - ECKD record ID - Number of records per track Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-15s390/sclp: event type macro cleanupSebastian Ott
Sort the sclp event type defines and use a macro to create the corresponding event type masks. In addition to that one unused type/mask pair is removed and another previously unused define is used now (it was probably unused/unknown because it didn't follow the EVTYP_X EVTYP_X_MASK convention). Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-15s390/sclp: add error notification commandSebastian Ott
Add SCLP event 24 "Adapter-error notification". Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-15s390/sclp: move pci related commands to separate fileSebastian Ott
sclp commands only used by the PCI code shouldn't be build for !CONFIG_PCI. Instead of adding more ifdefs to sclp_cmd.c just move them to a new file. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-15s390/dasd: add query host access to volume supportStefan Haberland
With this feature, applications can query if a DASD volume is online to another operating system instances by checking the online status of all attached hosts from the storage server. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-15s390/dcssblk: fix possible deadlock in remove vs. per-device attributesGerald Schaefer
dcssblk_remove_store() holds the dcssblk_devices_sem semaphore while calling device_unregister(), which in turn tries to acquire the kernfs kn->dev_map rwsem for the device sysfs subtree. The same rwsem is also acquired when using the per-device sysfs attributes in the device sub-tree, and the attribute handlers then also acquire the dcssblk_devices_sem. This can lead to a deadlock when removing a DCSS while concurrently reading from / writing to one of its sysfs attributes. The following lockdep warning hinted towards the issue (CPU0 = dcssblk_remove_store, CPU1 = dcssblk_shared_store): [ 76.496047] Possible unsafe locking scenario: [ 76.496054] CPU0 CPU1 [ 76.496059] ---- ---- [ 76.496087] lock(&dcssblk_devices_sem); [ 76.496090] lock(s_active#175); [ 76.496106] lock(&dcssblk_devices_sem); [ 76.496110] lock(s_active#175); [ 76.496115] *** DEADLOCK *** Fix this by releasing the dcssblk_devices_sem semaphore, which only protects internal DCSS data, before calling device_unregister(). Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-11scsi: disable automatic target scanHannes Reinecke
On larger installations it is useful to disable automatic LUN scanning, and only add the required LUNs via udev rules. This can speed up bootup dramatically. This patch introduces a new scan module parameter value 'manual', which works like 'none', but can be overridden by setting the 'rescan' value from scsi_scan_target to 'SCSI_SCAN_MANUAL'. And it updates all relevant callers to set the 'rescan' value to 'SCSI_SCAN_MANUAL' if invoked via the 'scan' option in sysfs. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Ewan D. Milne <emilne@redhat.com> Tested-by: Laurence Oberman <loberman@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-01s390/scm_blk: fix deadlock for requests != REQ_TYPE_FSSebastian Ott
When we refuse a non REQ_TYPE_FS request in the build request function we already hold the queue lock. Thus we must not call blk_end_request_all but __blk_end_request_all. Reported-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Fixes: de9587a ('s390/scm_blk: fix endless loop for requests != REQ_TYPE_FS') Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-04-01Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Martin Schwidefsky: - A proper fix for the locking issue in the dasd driver - Wire up the new preadv2 nad pwritev2 system calls - Add the mark_rodata_ro function and set DEBUG_RODATA=y - A few more bug fixes. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390: wire up preadv2/pwritev2 syscalls s390/pci: PCI function group 0 is valid for clp_query_pci_fn s390/crypto: provide correct file mode at device register. s390/mm: handle PTE-mapped tail pages in fast gup s390: add DEBUG_RODATA support s390: disable postinit-readonly for now s390/dasd: reorder lcu and device lock s390/cpum_sf: Fix cpu hotplug notifier transitions s390/cpum_cf: Fix missing cpu hotplug notifier transition
2016-03-20Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds
Pull virtio/vhost updates from Michael Tsirkin: "New features, performance improvements, cleanups: - basic polling support for vhost - rework virtio to optionally use DMA API, fixing it on Xen - balloon stats gained a new entry - using the new napi_alloc_skb speeds up virtio net - virtio blk stats can now be read while another VCPU is busy inflating or deflating the balloon plus misc cleanups in various places" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio_net: replace netdev_alloc_skb_ip_align() with napi_alloc_skb() vhost_net: basic polling support vhost: introduce vhost_vq_avail_empty() vhost: introduce vhost_has_work() virtio_balloon: Allow to resize and update the balloon stats in parallel virtio_balloon: Use a workqueue instead of "vballoon" kthread virtio/s390: size of SET_IND payload virtio/s390: use dev_to_virtio vhost: rename vhost_init_used() vhost: rename cross-endian helpers virtio_blk: VIRTIO_BLK_F_WCE->VIRTIO_BLK_F_FLUSH vring: Use the DMA API on Xen virtio_pci: Use the DMA API if enabled virtio_mmio: Use the DMA API if enabled virtio: Add improved queue allocation API virtio_ring: Support DMA APIs vring: Introduce vring_use_dma_api() s390/dma: Allow per device dma ops alpha/dma: use common noop dma ops dma: Provide simple noop dma ops
2016-03-17Merge tag 'tty-4.6-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial updates from Greg KH: "Here's the big tty/serial driver pull request for 4.6-rc1. Lots of changes in here, Peter has been on a tear again, with lots of refactoring and bugs fixes, many thanks to the great work he has been doing. Lots of driver updates and fixes as well, full details in the shortlog. All have been in linux-next for a while with no reported issues" * tag 'tty-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (220 commits) serial: 8250: describe CONFIG_SERIAL_8250_RSA serial: samsung: optimize UART rx fifo access routine serial: pl011: add mark/space parity support serial: sa1100: make sa1100_register_uart_fns a function tty: serial: 8250: add MOXA Smartio MUE boards support serial: 8250: convert drivers to use up_to_u8250p() serial: 8250/mediatek: fix building with SERIAL_8250=m serial: 8250/ingenic: fix building with SERIAL_8250=m serial: 8250/uniphier: fix modular build Revert "drivers/tty/serial: make 8250/8250_ingenic.c explicitly non-modular" Revert "drivers/tty/serial: make 8250/8250_mtk.c explicitly non-modular" serial: mvebu-uart: initial support for Armada-3700 serial port serial: mctrl_gpio: Add missing module license serial: ifx6x60: avoid uninitialized variable use tty/serial: at91: fix bad offset for UART timeout register tty/serial: at91: restore dynamic driver binding serial: 8250: Add hardware dependency to RT288X option TTY, devpts: document pty count limiting tty: goldfish: support platform_device with id -1 drivers: tty: goldfish: Add device tree bindings ...
2016-03-17s390/dasd: reorder lcu and device lockStefan Haberland
Reorder lcu and device lock to get rid of the error-prone trylock mechanism. The locking order is lcu lock -> device lock. This protects against changes to the lcu device lists and enables us to iterate over the devices, take the cdev lock and make changes to the device structures. The complicated part is the summary unit check handler that gets an interrupt on one device of the lcu that leads to structural changes of the whole lcu itself. This work needs to be done even if devices on the lcu disappear. So a device independent worker is used. The old approach tried to update some lcu structures and set up the lcu worker in the interrupt context with the device lock held. But this forced the lock order "cdev lock -> lcu lock" that made it hard to have the lcu lock held and iterate over all devices and change them. The new approach is to schedule a device specific worker that gets out of the interrupt context and rid of the device lock for summary unit checks. This worker is able to take the lcu lock and schedule the lcu worker that updates all devices. The time between interrupt and worker execution is no problem because the devices in the lcu reject all I/O in this time with an appropriate error. The dasd driver can deal with this situation and re-drive the I/O later on. Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-03-16Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Martin Schwidefsky: - Add the CPU id for the new z13s machine - Add a s390 specific XOR template for RAID-5 checksumming based on the XC instruction. Remove all other alternatives, XC is always faster - The merge of our four different stack tracers into a single one - Tidy up the code related to page tables, several large inline functions are now out-of-line. Bloat-o-meter reports ~11K text size reduction - A binary interface for the priviledged CLP instruction to retrieve the hardware view of the installed PCI functions - Improvements for the dasd format code - Bug fixes and cleanups * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (31 commits) s390/pci: enforce fmb page boundary rule s390: fix floating pointer register corruption (again) s390/cpumf: add missing lpp magic initialization s390: Fix misspellings in comments s390/mm: split arch/s390/mm/pgtable.c s390/mm: uninline pmdp_xxx functions from pgtable.h s390/mm: uninline ptep_xxx functions from pgtable.h s390/pci: add ioctl interface for CLP s390: Use pr_warn instead of pr_warning s390/dasd: remove casts to dasd_*_private s390/dasd: Refactor dasd format functions s390/dasd: Simplify code in format logic s390/dasd: Improve dasd format code s390/percpu: remove this_cpu_cmpxchg_double_4 s390/cpumf: Improve guest detection heuristics s390/fault: merge report_user_fault implementations s390/dis: use correct escape sequence for '%' character s390/kvm: simplify set_guest_storage_key s390/oprofile: add z13/z13s model numbers s390: add z13s model number to z13 elf platform ...
2016-03-07s390: Use pr_warn instead of pr_warningJoe Perches
Convert the uses of pr_warning to pr_warn so there are fewer uses of the old pr_warning. Miscellanea: o Align arguments o Coalesce formats Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-03-07s390/dasd: remove casts to dasd_*_privateSebastian Ott
Convert dasd_device.private to be a void pointer to get rid of a lot of explicit casts. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-03-07s390/dasd: Refactor dasd format functionsJan Höppner
Prepare for new format checking function by renaming functions and moving reusable code to separate functions: - Move sanity checks into a new function and make it reusable. - Move common format code to a new function called dasd_eckd_format_process_data. - Create the generic function dasd_eckd_format_build_ccw_req, which itself will then decide what ccw request is being built according to the input data. (with upcoming functionality). Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-03-07s390/dasd: Simplify code in format logicJan Höppner
Currently, dasd_format is calling the format logic of a DASD discipline with PAV enabled. If that fails with an error code of -EAGAIN the value of retries is decremented and the discipline function is called with PAV turned off. The loop is supposed to try this up to 255 times until success. However, -EAGAIN can only occur once here and therefore the loop will never reach the 255 retries. So, replace the unnecessarily complicated loop logic and simply try again without PAV enabled in case of an -EAGAIN error. Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-03-07s390/dasd: Improve dasd format codeJan Höppner
- Make sure a calling function can rely on data in fdata by resetting to its initial values - Move special treatment for track 0 and 1 to dasd_eckd_build_format - Replace dangerous backward goto with a loop logic - Add define for number that specifies the maximum amount of CCWs per request and is used for format_step calculation - Remove unused variable Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-03-02virtio/s390: size of SET_IND payloadCornelia Huck
SET_IND takes as a payload the _address_ of the indicators, meaning that we have one of the rare cases where kmalloc(sizeof(&...)) is actually correct. Let's clarify that with a comment. The count for the ccw, however, was only correct because the indicators are 64 bit. Let's use the correct value. Reported-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-03-02virtio/s390: use dev_to_virtioGeliang Tang
Use dev_to_virtio() instead of open-coding it. Signed-off-by: Geliang Tang <geliangtang@163.com> Message-Id: <912bf59bd3a48f2d4d4994681e898dc084fe29d3.1451484163.git.geliangtang@163.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-03-02s390/dasd: fix diag 0x250 inline assemblyHeiko Carstens
git commit 1ec2772e0c3c ("s390/diag: add a statistic for diagnose calls") added function calls to gather diagnose statistics. In case of the dasd diag driver the function call was added between a register asm statement which initialized register r2 and the inline assembly itself. The function call clobbers the contents of register r2 and therefore the diag 0x250 call behaves in a more or less random way. Fix this by extracting the function call into a separate function like we do everywhere else. Fixes: 1ec2772e0c3c ("s390/diag: add a statistic for diagnose calls") Cc: <stable@vger.kernel.org> # 4.4+ Reported-and-tested-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-02-23s390/dasd: fix incorrect locking order for LCU device add/removeStefan Haberland
The correct lock order for LCU lock and cdev lock is to take the cdev lock first and afterwards the LCU lock. This is caused by the fact that LCU functions are called in an interrupt context with the cdev lock implicitly hold by CIO. To assure the right locking order but also be able to iterate over devices in a LCU introduce a trylock block that can be called with the device lock for one device hold and then takes the LCU lock and try to lock all devices accounted to this LCU. Afterwards all devices and the LCU itself are locked. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-02-17s390/dasd: fix performance dropStefan Haberland
Commit ca369d51b ("sd: Fix device-imposed transfer length limits") introduced a new queue limit max_dev_sectors which limits the maximum sectors for requests. The default value leads to small dasd requests and therefor to a performance drop. Set the max_dev_sectors value to the same value as the max_hw_sectors to use the maximum available request size for DASD devices. Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com> Cc: stable@vger.kernel.org # 4.4+ Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-02-11s390/dasd: fix refcount for PAV reassignmentStefan Haberland
Add refcount to the DASD device when a summary unit check worker is scheduled. This prevents that the device is set offline with worker in place. Cc: stable@vger.kernel.org Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-02-11s390/dasd: prevent incorrect length error under z/VM after PAV changesStefan Haberland
The channel checks the specified length and the provided amount of data for CCWs and provides an incorrect length error if the size does not match. Under z/VM with simulation activated the length may get changed. Having the suppress length indication bit set is stated as good CCW coding practice and avoids errors under z/VM. Cc: stable@vger.kernel.org Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-02-01Merge 4.5-rc2 into tty-nextGreg Kroah-Hartman
We want the tty/serial fixes in here as well to make merges easier. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28tty: Remove ASYNC_CLOSINGPeter Hurley
The tty core no longer provides nor uses ASYNC_CLOSING; remove from tty_port_close_start() and tty_port_close_end() as well as tty drivers which open-code these state changes. Unfortunately, even though the bit is masked from userspace, its inclusion in a uapi header precludes removing the macro. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux-s390@vger.kernel.org Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: linux-cris-kernel@axis.com Cc: Samuel Ortiz <samuel@sortiz.org> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>