diff options
| author | Sumit Semwal <sumit.semwal@linaro.org> | 2017-09-15 18:14:44 -0700 |
|---|---|---|
| committer | Sumit Semwal <sumit.semwal@linaro.org> | 2017-09-15 18:14:44 -0700 |
| commit | 357fdc8959dc79696d9c43c2a3f7a93e3a503d87 (patch) | |
| tree | ee11e23191b602d459c2ddd42ad8688435907fc7 /drivers/scsi/sg.c | |
| parent | c6838a60d7c26d484dee76609ab0d528ff90a805 (diff) | |
| parent | b52c9082f2eb3a6f7fbbc86fad3eaa2a1725da66 (diff) | |
Merge remote-tracking branch 'stable/linux-4.4.y' into lts-4.4.y-hikey4.4.88-hikey
Try to fix adv7511.c collision
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Diffstat (limited to 'drivers/scsi/sg.c')
| -rw-r--r-- | drivers/scsi/sg.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 8a9e139e2853..71325972e503 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1254,6 +1254,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma) unsigned long req_sz, len, sa; Sg_scatter_hold *rsv_schp; int k, length; + int ret = 0; if ((!filp) || (!vma) || (!(sfp = (Sg_fd *) filp->private_data))) return -ENXIO; @@ -1264,8 +1265,11 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma) if (vma->vm_pgoff) return -EINVAL; /* want no offset */ rsv_schp = &sfp->reserve; - if (req_sz > rsv_schp->bufflen) - return -ENOMEM; /* cannot map more than reserved buffer */ + mutex_lock(&sfp->f_mutex); + if (req_sz > rsv_schp->bufflen) { + ret = -ENOMEM; /* cannot map more than reserved buffer */ + goto out; + } sa = vma->vm_start; length = 1 << (PAGE_SHIFT + rsv_schp->page_order); @@ -1279,7 +1283,9 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma) vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP; vma->vm_private_data = sfp; vma->vm_ops = &sg_mmap_vm_ops; - return 0; +out: + mutex_unlock(&sfp->f_mutex); + return ret; } static void @@ -1751,9 +1757,12 @@ sg_start_req(Sg_request *srp, unsigned char *cmd) !sfp->res_in_use) { sfp->res_in_use = 1; sg_link_reserve(sfp, srp, dxfer_len); - } else if ((hp->flags & SG_FLAG_MMAP_IO) && sfp->res_in_use) { + } else if (hp->flags & SG_FLAG_MMAP_IO) { + res = -EBUSY; /* sfp->res_in_use == 1 */ + if (dxfer_len > rsv_schp->bufflen) + res = -ENOMEM; mutex_unlock(&sfp->f_mutex); - return -EBUSY; + return res; } else { res = sg_build_indirect(req_schp, sfp, dxfer_len); if (res) { |