drivers/block/zram/zram_drv.c: fix error return codes not being returned in writeback...
authorColin Ian King <colin.king@canonical.com>
Fri, 31 Jan 2020 06:15:25 +0000 (22:15 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 31 Jan 2020 18:30:39 +0000 (10:30 -0800)
commit3b82a051c10143639a378dcd12019f2353cc9054
tree203276710640a066792e73a97d5072cf6a15a39a
parent90f82cbfe502e96e602614ebbaf7725470c5208a
drivers/block/zram/zram_drv.c: fix error return codes not being returned in writeback_store

Currently when an error code -EIO or -ENOSPC in the for-loop of
writeback_store the error code is being overwritten by a ret = len
assignment at the end of the function and the error codes are being
lost.  Fix this by assigning ret = len at the start of the function and
remove the assignment from the end, hence allowing ret to be preserved
when error codes are assigned to it.

Addresses Coverity ("Unused value")

Link: http://lkml.kernel.org/r/20191128122958.178290-1-colin.king@canonical.com
Fixes: a939888ec38b ("zram: support idle/huge page writeback")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/block/zram/zram_drv.c