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| author |   Sean Nyekjaer <sean@geanix.com> | 2022-02-08 09:52:13 +0100 |
|---|---|---|
| committer |   Miquel Raynal <miquel.raynal@bootlin.com> | 2022-02-09 09:30:21 +0100 |
| commit | 8cba323437a49a45756d661f500b324fc2d486fe (patch) | |
| tree | a152aef06ae0d4c676ff34a33ebd3abde6a32ede /include/linux/mtd/rawnand.h | |
| parent | mtd: rawnand: brcmnand: Fix sparse warnings in bcma_nand (diff) | |
| download | linux-dev-8cba323437a49a45756d661f500b324fc2d486fe.tar.xz linux-dev-8cba323437a49a45756d661f500b324fc2d486fe.zip | |
mtd: rawnand: protect access to rawnand devices while in suspend
Prevent rawnand access while in a suspended state.
Commit 013e6292aaf5 ("mtd: rawnand: Simplify the locking") allows the
rawnand layer to return errors rather than waiting in a blocking wait.
Tested on a iMX6ULL.
Fixes: 013e6292aaf5 ("mtd: rawnand: Simplify the locking")
Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Cc: stable@vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220208085213.1838273-1-sean@geanix.com
Diffstat (limited to 'include/linux/mtd/rawnand.h')
| -rw-r--r-- | include/linux/mtd/rawnand.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 5b88cd51fadb..dcf90144d70b 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1240,6 +1240,7 @@ struct nand_secure_region { * @lock: Lock protecting the suspended field. Also used to serialize accesses * to the NAND device * @suspended: Set to 1 when the device is suspended, 0 when it's not + * @resume_wq: wait queue to sleep if rawnand is in suspended state. * @cur_cs: Currently selected target. -1 means no target selected, otherwise we * should always have cur_cs >= 0 && cur_cs < nanddev_ntargets(). * NAND Controller drivers should not modify this value, but they're @@ -1294,6 +1295,7 @@ struct nand_chip { /* Internals */ struct mutex lock; unsigned int suspended : 1; + wait_queue_head_t resume_wq; int cur_cs; int read_retries; struct nand_secure_region *secure_regions; |