Brian Norris 9ca641b0f0 mtd: nand: fix shutdown/reboot for multi-chip systems ... If multiple NAND chips are registered to the same controller, then when rebooting the system, the first one will grab the controller lock, while the second will wait forever for the first one to release it. i.e., a classic deadlock. This problem was solved for a similar case (suspend/resume) back in commit 6b0d9a8412 ("mtd: nand: fix multi-chip suspend problem"), and the shutdown state really isn't much different for us, so rather than adding a new special case to nand_get_device(), we can just overload the FL_PM_SUSPENDED state. Now, multiple chips can "get" the same controller lock (preventing further I/O), while we still allow other chips to pass through nand_shutdown(). Original report: http://thread.gmane.org/gmane.linux.drivers.mtd/59726 http://lists.infradead.org/pipermail/linux-mtd/2015-July/059992.html Fixes: 72ea403669 ("mtd: nand: added nand_shutdown") Reported-by: Andrew E. Mileski <andrewm@isoar.ca> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Cc: Scott Branden <sbranden@broadcom.com> Cc: Andrew E. Mileski <andrewm@isoar.ca> Acked-by: Scott Branden <sbranden@broadcom.com> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>		2015-11-16 10:51:39 -08:00
..
chips
devices	MTD updates for 4.4-rc1:	2015-11-06 11:50:24 -08:00
lpddr	mtd: lpddr: show parent device in sysfs	2015-10-13 09:21:17 -07:00
maps	mtd: maps: rbtx4939-flash: fix compile error	2015-10-19 18:21:25 -07:00
nand	mtd: nand: fix shutdown/reboot for multi-chip systems	2015-11-16 10:51:39 -08:00
onenand	mtd: onenand: omap2: drop owner and name assignment	2015-10-13 12:56:43 -07:00
spi-nor	mtd: fsl-quadspi: fix macro collision problems with READ/WRITE	2015-10-26 14:44:56 -07:00
tests	mtd: tests: Replace timeval with ktime_t	2015-10-26 13:23:47 -07:00
ubi	This pull request includes the following UBI/UBIFS changes:	2015-11-10 16:35:06 -08:00
afs.c
ar7part.c
bcm47xxpart.c
bcm63xxpart.c
cmdlinepart.c
ftl.c
inftlcore.c
inftlmount.c
Kconfig
Makefile
mtd_blkdevs.c	mtd: blkdevs: fix potential deadlock + lockdep warnings	2015-10-30 17:24:43 -07:00
mtdblock_ro.c
mtdblock.c
mtdchar.c
mtdconcat.c
mtdcore.c	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
mtdcore.h
mtdoops.c
mtdpart.c	mtd: mtdpart: Do not fail mtd probe when parsing partitions fails	2015-10-26 18:43:48 -07:00
mtdsuper.c
mtdswap.c
nftlcore.c
nftlmount.c
ofpart.c	mtd: ofpart: move ofpart partitions to a dedicated dt node	2015-10-30 14:01:39 -07:00
redboot.c
rfd_ftl.c
sm_ftl.c
sm_ftl.h
ssfdc.c