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| author | Nitin Gupta <ngupta@vflare.org> | 2010-12-30 04:07:58 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-12-30 12:07:22 -0800 |
| commit | e983dc2428164698571e1dd1b25c4322181adbac (patch) | |
| tree | 8daebe3e685971ea0db8ddc0dcda96a1781019b2 | |
| parent | ff20f1779b7f60a9682aa8d62f8ca3b650e4c360 (diff) | |
| download | linux-e983dc2428164698571e1dd1b25c4322181adbac.tar.gz linux-e983dc2428164698571e1dd1b25c4322181adbac.tar.bz2 linux-e983dc2428164698571e1dd1b25c4322181adbac.zip | |
Revert "Staging: zram: work around oops due to startup ordering snafu"
This reverts commit 7e24cce38a99f373450db67bf576fe73e8168d66 because it
was never appropriate for mainline.
Do not check for init flag before starting I/O - zram module is unusable
without this fix.
The oops mentioned in the reverted commit message was actually a problem
only with the zram version as present in project's own repository where
we allocate struct zram_stats_cpu upon device initialization. OTOH, In
mainline/staging version of zram, we allocate struct stats upfront, so
this oops cannot happen in mainline version.
Checking for init_done flag in zram_make_request() results in a *no-op*
for any I/O operation since we simply always return success. This flag
is actually set when the first write occurs on a zram disk which
triggers its initialization.
Bug report: https://bugzilla.kernel.org/show_bug.cgi?id=25722
Reported-by: Dennis Jansen <dennis.jansen@web.de>
Signed-off-by: Nitin Gupta <ngupta@vflare.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/staging/zram/zram_drv.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c index 8c3c057aa847..d0e9e0207539 100644 --- a/drivers/staging/zram/zram_drv.c +++ b/drivers/staging/zram/zram_drv.c @@ -435,12 +435,6 @@ static int zram_make_request(struct request_queue *queue, struct bio *bio) int ret = 0; struct zram *zram = queue->queuedata; - if (unlikely(!zram->init_done)) { - set_bit(BIO_UPTODATE, &bio->bi_flags); - bio_endio(bio, 0); - return 0; - } - if (!valid_io_request(zram, bio)) { zram_stat64_inc(zram, &zram->stats.invalid_io); bio_io_error(bio); |