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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>
This commit is contained in:
Tejun Heo 2009-04-19 08:46:02 +09:00 committed by Jens Axboe
parent 765139ef5f
commit 08f370f0a2
2 changed files with 2 additions and 0 deletions
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1
drivers/ide/ide-floppy.c
View File

@ -141,6 +141,7 @@ static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
drive->failed_pc = NULL; drive->failed_pc = NULL;
drive->pc_callback(drive, 0); drive->pc_callback(drive, 0);
ide_complete_rq(drive, -EIO, blk_rq_bytes(drive->hwif->rq));
return ide_stopped; return ide_stopped;
} }

1
drivers/ide/ide-tape.c
View File

@ -643,6 +643,7 @@ static ide_startstop_t ide_tape_issue_pc(ide_drive_t *drive,
} }
drive->failed_pc = NULL; drive->failed_pc = NULL;
drive->pc_callback(drive, 0); drive->pc_callback(drive, 0);
ide_complete_rq(drive, -EIO, blk_rq_bytes(drive->hwif->rq));
return ide_stopped; return ide_stopped;
} }
debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]); debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]);