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| author | Alexander Belyakov <abelyako@googlemail.com> | 2007-11-07 11:58:07 +0300 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2007-11-26 15:54:16 +0000 |
| commit | 6c24e4161e80a5c03e9d969b5db73d8553846037 (patch) | |
| tree | 56c24fb17325d89259fc1ce27148a58c2d5523b1 /drivers | |
| parent | 5f4d47d5d1060a93be83e33a167a53a7f8c08b20 (diff) | |
| download | op-kernel-dev-6c24e4161e80a5c03e9d969b5db73d8553846037.zip op-kernel-dev-6c24e4161e80a5c03e9d969b5db73d8553846037.tar.gz | |
[MTD] [NOR] Prevent erase command invocation on suspended chip
while running stress tests we have met cfi_cmdset_0001.c driver issue.
Working on multipartitional devices with erase suspend on write
feature enabled it is possible to get erase operation invoked on chip
with suspended erase. get_chip() looses information about earlier
suspended erase and new erase operation gets issued. New erase
operations report successful completion, but blocks remain dirty
causing, for example, JFFS2 error messages like:
...
Newly-erased block contained word 0x20031985 at offset 0x00200000
Newly-erased block contained word 0x20031985 at offset 0x00280000
Newly-erased block contained word 0x20031985 at offset 0x00240000
...
The patch below fixes that issue.
Signed-off-by: Alexander Belyakov <alexander.belyakov@intel.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0001.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index ed5ce41..350671e 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -795,6 +795,7 @@ static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) { int ret; + DECLARE_WAITQUEUE(wait, current); retry: if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING @@ -851,6 +852,20 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr spin_unlock(contender->mutex); } + /* Check if we already have suspended erase + * on this chip. Sleep. */ + if (mode == FL_ERASING && shared->erasing + && shared->erasing->oldstate == FL_ERASING) { + spin_unlock(&shared->lock); + set_current_state(TASK_UNINTERRUPTIBLE); + add_wait_queue(&chip->wq, &wait); + spin_unlock(chip->mutex); + schedule(); + remove_wait_queue(&chip->wq, &wait); + spin_lock(chip->mutex); + goto retry; + } + /* We now own it */ shared->writing = chip; if (mode == FL_ERASING) |
