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zram: allow request end to coincide with disksize

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commit 75c7caf5a0 upstream.

Pass valid_io_request() checks if request end coincides with disksize
(end equals bound), only fail if we attempt to read beyond the bound.

mkfs.ext2 produces numerous errors:
[ 2164.632747] quiet_error: 1 callbacks suppressed
[ 2164.633260] Buffer I/O error on device zram0, logical block 153599
[ 2164.633265] lost page write due to I/O error on zram0

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Thomas Backlund <tmb@mageia.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergey Senozhatsky 2013-06-22 17:21:00 +03:00 • committed by Greg Kroah-Hartman
commit 94bcc7deb8
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/zram/zram_drv.c
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@ -432,7 +432,7 @@ static inline int valid_io_request(struct zram *zram, struct bio *bio)
end = start + (bio->bi_size >> SECTOR_SHIFT);
bound = zram->disksize >> SECTOR_SHIFT;
/* out of range range */
if (unlikely(start >= bound || end >= bound || start > end))
if (unlikely(start >= bound || end > bound || start > end))
return 0;
/* I/O request is valid */