From 57c1a24ee276a33190008243f986419e122c0dea Mon Sep 17 00:00:00 2001 From: Alexey Korolev Date: Tue, 6 Jan 2009 17:36:09 +0000 Subject: [MTD] [LPDDR] qinfo_probe depends on lpddr Signed-off-by: Alexey Korolev Signed-off-by: David Woodhouse --- drivers/mtd/lpddr/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mtd/lpddr/Kconfig b/drivers/mtd/lpddr/Kconfig index acd4ea9b227..5a401d8047a 100644 --- a/drivers/mtd/lpddr/Kconfig +++ b/drivers/mtd/lpddr/Kconfig @@ -12,6 +12,7 @@ config MTD_LPDDR DDR memories, intended for battery-operated systems. config MTD_QINFO_PROBE + depends on MTD_LPDDR tristate "Detect flash chips by QINFO probe" help Device Information for LPDDR chips is offered through the Overlay -- cgit v1.2.3 From 5f877607cdfe8b60bf96fb96e527e0ce2a21e68b Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Sun, 11 Jan 2009 19:52:19 +0000 Subject: [MTD] map_rom has NULL erase pointer Which means if inftl or similar are loaded with it (which is a dumb thing to do admittedly) it may oops. Closes #8108 [dwmw2: change error to -EROFS to match write-protected flash] Signed-off-by: Alan Cox Signed-off-by: David Woodhouse --- drivers/mtd/chips/map_rom.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c index 821d0ed6bae..c76d6e5f47e 100644 --- a/drivers/mtd/chips/map_rom.c +++ b/drivers/mtd/chips/map_rom.c @@ -19,6 +19,7 @@ static int maprom_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); static int maprom_write (struct mtd_info *, loff_t, size_t, size_t *, const u_char *); static void maprom_nop (struct mtd_info *); static struct mtd_info *map_rom_probe(struct map_info *map); +static int maprom_erase (struct mtd_info *mtd, struct erase_info *info); static struct mtd_chip_driver maprom_chipdrv = { .probe = map_rom_probe, @@ -42,6 +43,7 @@ static struct mtd_info *map_rom_probe(struct map_info *map) mtd->read = maprom_read; mtd->write = maprom_write; mtd->sync = maprom_nop; + mtd->erase = maprom_erase; mtd->flags = MTD_CAP_ROM; mtd->erasesize = map->size; mtd->writesize = 1; @@ -71,6 +73,12 @@ static int maprom_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *re return -EIO; } +static int maprom_erase (struct mtd_info *mtd, struct erase_info *info) +{ + /* We do our best 8) */ + return -EROFS; +} + static int __init map_rom_init(void) { register_mtd_chip_driver(&maprom_chipdrv); -- cgit v1.2.3 From 3afd522de8d8ec446efe957b86e4f63e3dd8ce9d Mon Sep 17 00:00:00 2001 From: Roel Kluin Date: Mon, 19 Jan 2009 00:15:13 +0100 Subject: [MTD] slram: Handle negative devlength correctly A negative devlength won't get noticed and clean up: Signed-off-by: Roel Kluin Signed-off-by: David Woodhouse --- drivers/mtd/devices/slram.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/devices/slram.c b/drivers/mtd/devices/slram.c index a425d09f35a..00248e81ecd 100644 --- a/drivers/mtd/devices/slram.c +++ b/drivers/mtd/devices/slram.c @@ -267,22 +267,28 @@ static int parse_cmdline(char *devname, char *szstart, char *szlength) if (*(szlength) != '+') { devlength = simple_strtoul(szlength, &buffer, 0); devlength = handle_unit(devlength, buffer) - devstart; + if (devlength < devstart) + goto err_out; + + devlength -= devstart; } else { devlength = simple_strtoul(szlength + 1, &buffer, 0); devlength = handle_unit(devlength, buffer); } T("slram: devname=%s, devstart=0x%lx, devlength=0x%lx\n", devname, devstart, devlength); - if ((devstart < 0) || (devlength < 0) || (devlength % SLRAM_BLK_SZ != 0)) { - E("slram: Illegal start / length parameter.\n"); - return(-EINVAL); - } + if (devlength % SLRAM_BLK_SZ != 0) + goto err_out; if ((devstart = register_device(devname, devstart, devlength))){ unregister_devices(); return((int)devstart); } return(0); + +err_out: + E("slram: Illegal length parameter.\n"); + return(-EINVAL); } #ifndef MODULE -- cgit v1.2.3 From e480814f138cd5d78a8efe397756ba6b6518fdb6 Mon Sep 17 00:00:00 2001 From: Atsushi Nemoto Date: Wed, 11 Feb 2009 13:12:17 -0800 Subject: [MTD] [MAPS] physmap: fix wrong free and del_mtd_{partition,device} commit 176bf2e0f10ecf1d20a97db3bd5bb2e6ba0b5668 ("physmap: fix leak of memory returned by parse_mtd_partitions") deals with a memory leak and frees the pointer array of mtd_partition after the call to add_mtd_partitions(). the problem is that mtd_table[x]->name still points to the freed memory. Aldo physmap_flash_remove() should call del_mtd_partitions() or del_mtd_device() only once. Signed-off-by: Atsushi Nemoto Reported-by: Matthias Kaehlcke Tested-by: Matthias Kaehlcke Signed-off-by: Andrew Morton Signed-off-by: David Woodhouse --- drivers/mtd/maps/physmap.c | 38 +++++++++++++++++++------------------- 1 file changed, 19 insertions(+), 19 deletions(-) diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c index 87743661d48..4b122e7ab4b 100644 --- a/drivers/mtd/maps/physmap.c +++ b/drivers/mtd/maps/physmap.c @@ -29,6 +29,7 @@ struct physmap_flash_info { struct map_info map[MAX_RESOURCES]; #ifdef CONFIG_MTD_PARTITIONS int nr_parts; + struct mtd_partition *parts; #endif }; @@ -45,25 +46,26 @@ static int physmap_flash_remove(struct platform_device *dev) physmap_data = dev->dev.platform_data; -#ifdef CONFIG_MTD_CONCAT - if (info->cmtd != info->mtd[0]) { +#ifdef CONFIG_MTD_PARTITIONS + if (info->nr_parts) { + del_mtd_partitions(info->cmtd); + kfree(info->parts); + } else if (physmap_data->nr_parts) + del_mtd_partitions(info->cmtd); + else del_mtd_device(info->cmtd); +#else + del_mtd_device(info->cmtd); +#endif + +#ifdef CONFIG_MTD_CONCAT + if (info->cmtd != info->mtd[0]) mtd_concat_destroy(info->cmtd); - } #endif for (i = 0; i < MAX_RESOURCES; i++) { - if (info->mtd[i] != NULL) { -#ifdef CONFIG_MTD_PARTITIONS - if (info->nr_parts || physmap_data->nr_parts) - del_mtd_partitions(info->mtd[i]); - else - del_mtd_device(info->mtd[i]); -#else - del_mtd_device(info->mtd[i]); -#endif + if (info->mtd[i] != NULL) map_destroy(info->mtd[i]); - } } return 0; } @@ -86,9 +88,6 @@ static int physmap_flash_probe(struct platform_device *dev) int err = 0; int i; int devices_found = 0; -#ifdef CONFIG_MTD_PARTITIONS - struct mtd_partition *parts; -#endif physmap_data = dev->dev.platform_data; if (physmap_data == NULL) @@ -167,10 +166,11 @@ static int physmap_flash_probe(struct platform_device *dev) goto err_out; #ifdef CONFIG_MTD_PARTITIONS - err = parse_mtd_partitions(info->cmtd, part_probe_types, &parts, 0); + err = parse_mtd_partitions(info->cmtd, part_probe_types, + &info->parts, 0); if (err > 0) { - add_mtd_partitions(info->cmtd, parts, err); - kfree(parts); + add_mtd_partitions(info->cmtd, info->parts, err); + info->nr_parts = err; return 0; } -- cgit v1.2.3 From 10715b8751dfc403aeb7fbc35166417fa1664eda Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Wed, 11 Feb 2009 13:12:18 -0800 Subject: [MTD] [MAPS] blackfin: fix memory leak in error path Signed-off-by: Mike Frysinger Signed-off-by: Bryan Wu Signed-off-by: Andrew Morton Signed-off-by: David Woodhouse --- drivers/mtd/maps/bfin-async-flash.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/maps/bfin-async-flash.c b/drivers/mtd/maps/bfin-async-flash.c index 6fec86aaed7..576611f605d 100644 --- a/drivers/mtd/maps/bfin-async-flash.c +++ b/drivers/mtd/maps/bfin-async-flash.c @@ -152,14 +152,18 @@ static int __devinit bfin_flash_probe(struct platform_device *pdev) if (gpio_request(state->enet_flash_pin, DRIVER_NAME)) { pr_devinit(KERN_ERR DRIVER_NAME ": Failed to request gpio %d\n", state->enet_flash_pin); + kfree(state); return -EBUSY; } gpio_direction_output(state->enet_flash_pin, 1); pr_devinit(KERN_NOTICE DRIVER_NAME ": probing %d-bit flash bus\n", state->map.bankwidth * 8); state->mtd = do_map_probe(memory->name, &state->map); - if (!state->mtd) + if (!state->mtd) { + gpio_free(state->enet_flash_pin); + kfree(state); return -ENXIO; + } #ifdef CONFIG_MTD_PARTITIONS ret = parse_mtd_partitions(state->mtd, part_probe_types, &pdata->parts, 0); -- cgit v1.2.3 From ab00d68276295a1b4da7ad924a35a3566e9c2698 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Wed, 11 Feb 2009 13:12:19 -0800 Subject: [MTD] [MAPS] blackfin async requires complex mappings Correct a build error. bfin-async uses complex mappings and so needs it. Signed-off-by: Mike Frysinger Signed-off-by: Bryan Wu Cc: David Woodhouse Signed-off-by: Andrew Morton Signed-off-by: David Woodhouse --- drivers/mtd/maps/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig index 0225cbbf22d..043d50fb6ef 100644 --- a/drivers/mtd/maps/Kconfig +++ b/drivers/mtd/maps/Kconfig @@ -491,7 +491,7 @@ config MTD_PCMCIA_ANONYMOUS config MTD_BFIN_ASYNC tristate "Blackfin BF533-STAMP Flash Chip Support" - depends on BFIN533_STAMP && MTD_CFI + depends on BFIN533_STAMP && MTD_CFI && MTD_COMPLEX_MAPPINGS select MTD_PARTITIONS default y help -- cgit v1.2.3 From efab0b5d3eed6aa71f8e3233e4e11774eedc04dc Mon Sep 17 00:00:00 2001 From: Andres Salomon Date: Wed, 11 Feb 2009 13:27:02 -0800 Subject: [JFFS2] force the jffs2 GC daemon to behave a bit better I've noticed some pretty poor behavior on OLPC machines after bootup, when gdm/X are starting. The GCD monopolizes the scheduler (which in turns means it gets to do more nand i/o), which results in processes taking much much longer than they should to start. As an example, on an OLPC machine going from OFW to a usable X (via auto-login gdm) takes 2m 30s. The majority of this time is consumed by the switch into graphical mode. With this patch, we cut a full 60s off of bootup time. After bootup, things are much snappier as well. Note that we have seen a CRC node error with this patch that causes the machine to fail to boot, but we've also seen that problem without this patch. Signed-off-by: Andres Salomon Signed-off-by: Andrew Morton Signed-off-by: David Woodhouse --- fs/jffs2/background.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/fs/jffs2/background.c b/fs/jffs2/background.c index 3cceef4ad2b..e9580104b6b 100644 --- a/fs/jffs2/background.c +++ b/fs/jffs2/background.c @@ -95,13 +95,17 @@ static int jffs2_garbage_collect_thread(void *_c) spin_unlock(&c->erase_completion_lock); - /* This thread is purely an optimisation. But if it runs when - other things could be running, it actually makes things a - lot worse. Use yield() and put it at the back of the runqueue - every time. Especially during boot, pulling an inode in - with read_inode() is much preferable to having the GC thread - get there first. */ - yield(); + /* Problem - immediately after bootup, the GCD spends a lot + * of time in places like jffs2_kill_fragtree(); so much so + * that userspace processes (like gdm and X) are starved + * despite plenty of cond_resched()s and renicing. Yield() + * doesn't help, either (presumably because userspace and GCD + * are generally competing for a higher latency resource - + * disk). + * This forces the GCD to slow the hell down. Pulling an + * inode in with read_inode() is much preferable to having + * the GC thread get there first. */ + schedule_timeout_interruptible(msecs_to_jiffies(50)); /* Put_super will send a SIGKILL and then wait on the sem. */ -- cgit v1.2.3 From 4c41bd0ec953954158f92bed5d3062645062b98e Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 16 Feb 2009 21:29:31 +0100 Subject: [JFFS2] fix mount crash caused by removed nodes At scan time we observed following scenario: node A inserted node B inserted node C inserted -> sets overlapped flag on node B node A is removed due to CRC failure -> overlapped flag on node B remains while (tn->overlapped) tn = tn_prev(tn); ==> crash, when tn_prev(B) is referenced. When the ultimate node is removed at scan time and the overlapped flag is set on the penultimate node, then nothing updates the overlapped flag of that node. The overlapped iterators blindly expect that the ultimate node does not have the overlapped flag set, which causes the scan code to crash. It would be a huge overhead to go through the node chain on node removal and fix up the overlapped flags, so detecting such a case on the fly in the overlapped iterators is a simpler and reliable solution. Cc: stable@kernel.org Signed-off-by: Thomas Gleixner Signed-off-by: David Woodhouse --- fs/jffs2/readinode.c | 42 +++++++++++++++++++++++++++++++++--------- 1 file changed, 33 insertions(+), 9 deletions(-) diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c index 6ca08ad887c..1fc1e92356e 100644 --- a/fs/jffs2/readinode.c +++ b/fs/jffs2/readinode.c @@ -220,7 +220,7 @@ static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info *tn) { uint32_t fn_end = tn->fn->ofs + tn->fn->size; - struct jffs2_tmp_dnode_info *this; + struct jffs2_tmp_dnode_info *this, *ptn; dbg_readinode("insert fragment %#04x-%#04x, ver %u at %08x\n", tn->fn->ofs, fn_end, tn->version, ref_offset(tn->fn->raw)); @@ -251,11 +251,18 @@ static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c, if (this) { /* If the node is coincident with another at a lower address, back up until the other node is found. It may be relevant */ - while (this->overlapped) - this = tn_prev(this); - - /* First node should never be marked overlapped */ - BUG_ON(!this); + while (this->overlapped) { + ptn = tn_prev(this); + if (!ptn) { + /* + * We killed a node which set the overlapped + * flags during the scan. Fix it up. + */ + this->overlapped = 0; + break; + } + this = ptn; + } dbg_readinode("'this' found %#04x-%#04x (%s)\n", this->fn->ofs, this->fn->ofs + this->fn->size, this->fn ? "data" : "hole"); } @@ -360,7 +367,17 @@ static int jffs2_add_tn_to_tree(struct jffs2_sb_info *c, } if (!this->overlapped) break; - this = tn_prev(this); + + ptn = tn_prev(this); + if (!ptn) { + /* + * We killed a node which set the overlapped + * flags during the scan. Fix it up. + */ + this->overlapped = 0; + break; + } + this = ptn; } } @@ -456,8 +473,15 @@ static int jffs2_build_inode_fragtree(struct jffs2_sb_info *c, eat_last(&rii->tn_root, &last->rb); ver_insert(&ver_root, last); - if (unlikely(last->overlapped)) - continue; + if (unlikely(last->overlapped)) { + if (pen) + continue; + /* + * We killed a node which set the overlapped + * flags during the scan. Fix it up. + */ + last->overlapped = 0; + } /* Now we have a bunch of nodes in reverse version order, in the tree at ver_root. Most of the time, -- cgit v1.2.3 From b50be33e42e2c87812b30aee1a2b2a5ac6cb3ffa Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Fri, 27 Feb 2009 04:51:33 +0900 Subject: [MTD] [MAPS] Remove MODULE_DEVICE_TABLE() from ck804rom driver. We really don't want the BIOS flash mapping hacks to get automatically loaded. No idea why it isn't using pci_register_driver() though -- that should be fine... and is even _present_ but disabled by #if 0. Signed-off-by: David Woodhouse --- drivers/mtd/maps/ck804xrom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/maps/ck804xrom.c b/drivers/mtd/maps/ck804xrom.c index 5f7a245ed13..424f17d6ffd 100644 --- a/drivers/mtd/maps/ck804xrom.c +++ b/drivers/mtd/maps/ck804xrom.c @@ -342,9 +342,9 @@ static struct pci_device_id ck804xrom_pci_tbl[] = { { 0, } }; +#if 0 MODULE_DEVICE_TABLE(pci, ck804xrom_pci_tbl); -#if 0 static struct pci_driver ck804xrom_driver = { .name = MOD_NAME, .id_table = ck804xrom_pci_tbl, -- cgit v1.2.3