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mtd: cfi: cmdset_0001: Do not allow read/write to suspend erase block.

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Currently it is possible to read and/or write to suspend EB's.
Writing /dev/mtdX or /dev/mtdblockX from several processes may
break the flash state machine.

Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Joakim Tjernlund
2018-03-01 14:39:39 +01:00
committed by Boris Brezillon
parent 47016b341f
commit 6510bbc88e
2 changed files with 12 additions and 5 deletions
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include/linux/mtd/flashchip.h
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@@ -85,6 +85,7 @@ struct flchip {
unsigned int write_suspended:1;
unsigned int erase_suspended:1;
unsigned long in_progress_block_addr;
unsigned long in_progress_block_mask;
struct mutex mutex;
wait_queue_head_t wq; /* Wait on here when we're waiting for the chip