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authorTejun Heo <tj@kernel.org>2009-04-19 08:46:02 +0900
committerJens Axboe <jens.axboe@oracle.com>2009-04-28 07:37:31 +0200
commit08f370f0a2fb223bf48d0bfa2a173be0393c19dc (patch)
tree1e9af2e0941f1c8bd590f32c342676763f451046
parent765139ef5f1a4b1d5cb1f1a7a12de7ee61f6500f (diff)
ide-tape,floppy: fix failed command completion after request sense
Impact: fix infinite retry loop After a command failed, ide-tape and floppy inserts REQUEST_SENSE in front of the failed command and according to the result, sets pc->retries, flags and errors. After REQUEST_SENSE is complete, the failed command is again at the front of the queue and if the verdict was to terminate the request, the issue functions tries to complete it directly by calling drive->pc_callback() and returning ide_stopped. However, drive->pc_callback() doesn't complete a request. It only prepares for completion of the request. As a result, this creates an infinite loop where the failed request is retried perpetually. Fix it by actually ending the request by calling ide_complete_rq(). Signed-off-by: Tejun Heo <tj@kernel.org>
-rw-r--r--drivers/ide/ide-floppy.c1
-rw-r--r--drivers/ide/ide-tape.c1
2 files changed, 2 insertions, 0 deletions
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index d3302cc891e..d20704ac318 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -141,6 +141,7 @@ static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
drive->failed_pc = NULL;
drive->pc_callback(drive, 0);
+ ide_complete_rq(drive, -EIO, blk_rq_bytes(drive->hwif->rq));
return ide_stopped;
}
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 9b762a2d5d9..2b9a13671c5 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -643,6 +643,7 @@ static ide_startstop_t ide_tape_issue_pc(ide_drive_t *drive,
}
drive->failed_pc = NULL;
drive->pc_callback(drive, 0);
+ ide_complete_rq(drive, -EIO, blk_rq_bytes(drive->hwif->rq));
return ide_stopped;
}
debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]);