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hujianyang f0958ab02d UBI: fix soft lockup in ubi_check_volume() ... commit 9aa272b492 upstream. Running mtd-utils/tests/ubi-tests/io_basic.c could cause soft lockup or watchdog reset. It is because *updatevol* will perform ubi_check_volume() after updating finish and this function will full scan the updated lebs if the volume is initialized as STATIC_VOLUME. This patch adds *cond_resched()* in the loop of lebs scan to avoid soft lockup. Helped by Richard Weinberger <richard@nod.at> [ 2158.067096] INFO: rcu_sched self-detected stall on CPU { 1} (t=2101 jiffies g=1606 c=1605 q=56) [ 2158.172867] CPU: 1 PID: 2073 Comm: io_basic Tainted: G O 3.10.53 #21 [ 2158.172898] [<c000f624>] (unwind_backtrace+0x0/0x120) from [<c000c294>] (show_stack+0x10/0x14) [ 2158.172918] [<c000c294>] (show_stack+0x10/0x14) from [<c008ac3c>] (rcu_check_callbacks+0x1c0/0x660) [ 2158.172936] [<c008ac3c>] (rcu_check_callbacks+0x1c0/0x660) from [<c002b480>] (update_process_times+0x38/0x64) [ 2158.172953] [<c002b480>] (update_process_times+0x38/0x64) from [<c005ff38>] (tick_sched_handle+0x54/0x60) [ 2158.172966] [<c005ff38>] (tick_sched_handle+0x54/0x60) from [<c00601ac>] (tick_sched_timer+0x44/0x74) [ 2158.172978] [<c00601ac>] (tick_sched_timer+0x44/0x74) from [<c003f348>] (__run_hrtimer+0xc8/0x1b8) [ 2158.172992] [<c003f348>] (__run_hrtimer+0xc8/0x1b8) from [<c003fd9c>] (hrtimer_interrupt+0x128/0x2a4) [ 2158.173007] [<c003fd9c>] (hrtimer_interrupt+0x128/0x2a4) from [<c0246f1c>] (arch_timer_handler_virt+0x28/0x30) [ 2158.173022] [<c0246f1c>] (arch_timer_handler_virt+0x28/0x30) from [<c0086214>] (handle_percpu_devid_irq+0x9c/0x124) [ 2158.173036] [<c0086214>] (handle_percpu_devid_irq+0x9c/0x124) from [<c0082bd8>] (generic_handle_irq+0x20/0x30) [ 2158.173049] [<c0082bd8>] (generic_handle_irq+0x20/0x30) from [<c000969c>] (handle_IRQ+0x64/0x8c) [ 2158.173060] [<c000969c>] (handle_IRQ+0x64/0x8c) from [<c0008544>] (gic_handle_irq+0x3c/0x60) [ 2158.173074] [<c0008544>] (gic_handle_irq+0x3c/0x60) from [<c02f0f80>] (__irq_svc+0x40/0x50) [ 2158.173083] Exception stack(0xc4043c98 to 0xc4043ce0) [ 2158.173092] 3c80: c4043ce4 00000019 [ 2158.173102] 3ca0: 1f8a865f c050ad10 1f8a864c 00000031 c04b5970 0003ebce 00000000 f3550000 [ 2158.173113] 3cc0: bf00bc68 00000800 0003ebce c4043ce0 c0186d14 c0186cb8 80000013 ffffffff [ 2158.173130] [<c02f0f80>] (__irq_svc+0x40/0x50) from [<c0186cb8>] (read_current_timer+0x4/0x38) [ 2158.173145] [<c0186cb8>] (read_current_timer+0x4/0x38) from [<1f8a865f>] (0x1f8a865f) [ 2183.927097] BUG: soft lockup - CPU#1 stuck for 22s! [io_basic:2073] [ 2184.002229] Modules linked in: nandflash(O) [last unloaded: nandflash] Signed-off-by: Wang Kai <morgan.wang@huawei.com> Signed-off-by: hujianyang <hujianyang@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>		History 2015-05-12 09:36:35 +01:00
..
chips	mtd: cfi_cmdset_0001.c: fix resume for LH28F640BF chips	2014-11-13 11:48:57 +00:00
devices	mtd: m25p80,spi-nor: Fix module aliases for m25p80	2014-11-13 11:48:34 +00:00
lpddr	mtd: lpddr: fix Kconfig dependency, for I/O accessors	2014-05-26 10:38:25 -07:00
maps	mtd: maps: remove check for CONFIG_MTD_SUPERH_RESERVE	2014-05-28 15:12:47 -07:00
nand	mtd: nand: pxa3xx: Fix PIO FIFO draining	2015-03-23 15:16:12 +00:00
onenand	mtd: onenand: fix build warning for dma type	2014-05-20 16:35:31 -07:00
spi-nor	mtd: m25p80,spi-nor: Fix module aliases for m25p80	2014-11-13 11:48:34 +00:00
tests	mtd: tests: abort torturetest on erase errors	2015-01-15 10:44:05 +00:00
ubi	UBI: fix soft lockup in ubi_check_volume()	2015-05-12 09:36:35 +01:00
afs.c	mtd: make register_mtd_parser return void	2014-01-03 11:22:22 -08:00
ar7part.c	mtd: make register_mtd_parser return void	2014-01-03 11:22:22 -08:00
bcm47xxpart.c	mtd: bcm47xxpart: allow enabling on ARCH_BCM_5301X	2014-03-10 22:42:29 -07:00
bcm63xxpart.c	mtd: make register_mtd_parser return void	2014-01-03 11:22:22 -08:00
cmdlinepart.c	mtd: make register_mtd_parser return void	2014-01-03 11:22:22 -08:00
ftl.c	mtd/ftl: fix the double free of the buffers allocated in build_maps()	2014-09-17 09:22:20 -07:00
inftlcore.c	mtd: nand: add a helper to detect the nand type	2013-10-27 16:27:06 -07:00
inftlmount.c	mtd: delete non-required instances of include <linux/init.h>	2014-03-10 22:42:22 -07:00
Kconfig	mtd: spi-nor: add the framework for SPI NOR	2014-04-14 11:22:58 -07:00
Makefile	mtd: spi-nor: shorten Kconfig naming	2014-04-14 11:23:01 -07:00
mtd_blkdevs.c	MTD updates for 3.16:	2014-06-11 08:35:34 -07:00
mtdblock.c	mtd: Move major number definitions to major.h	2013-11-06 23:32:59 -08:00
mtdblock_ro.c	mtd: Move major number definitions to major.h	2013-11-06 23:32:59 -08:00
mtdchar.c	mtd: Fix warning in access_ok() parameter passing	2014-05-20 16:35:29 -07:00
mtdconcat.c	mtd: unify initialization of erase_info->fail_addr	2012-03-27 01:02:24 +01:00
mtdcore.c	mtd: Fix the behavior of OTP write if there is not enough room for data	2014-03-10 22:42:31 -07:00
mtdcore.h	mtd: merge mtdchar module with mtdcore	2013-04-05 13:16:54 +01:00
mtdoops.c	mtdoops: don't erase flash at each boot	2012-11-15 15:37:51 +02:00
mtdpart.c	mtd: Add a retlen parameter to _get_{fact,user}_prot_info	2014-03-10 22:42:28 -07:00
mtdsuper.c	mtd: Move major number definitions to major.h	2013-11-06 23:32:59 -08:00
mtdswap.c	mtd: mtdswap: replace strict_strtoul() with kstrtoul()	2013-08-30 21:52:51 +01:00
nftlcore.c	mtd: nand: add a helper to detect the nand type	2013-10-27 16:27:06 -07:00
nftlmount.c	mtd: introduce mtd_block_markbad interface	2012-01-09 18:25:48 +00:00
ofpart.c	mtd: make register_mtd_parser return void	2014-01-03 11:22:22 -08:00
redboot.c	mtd: make register_mtd_parser return void	2014-01-03 11:22:22 -08:00
rfd_ftl.c	mtd: remove some duplicative checks	2014-03-10 22:42:25 -07:00
sm_ftl.c	mtd: sm_ftl: heap corruption in sm_create_sysfs_attributes()	2014-03-10 22:42:21 -07:00
sm_ftl.h	mtd: sm_ftl: cosmetic, use bool when possible	2010-10-25 01:33:08 +01:00
ssfdc.c	mtd: nand: add a helper to detect the nand type	2013-10-27 16:27:06 -07:00