diff options
| author | Linus Torvalds <torvalds@g5.osdl.org> | 2005-12-12 11:25:04 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-12-12 11:25:04 -0800 |
| commit | 49d7bc64283970ee83d2c954d04ba00d04e5943d (patch) | |
| tree | 7011cfcf89a09a2ef4fdcd04cb835bfed4b6677a | |
| parent | 5036805be7b815eb18dcce489d974f3aee4f3841 (diff) | |
Revert revert of "[SCSI] fix usb storage oops"
This reverts commit 1b0997f561bf46689cc6e0903f342e9bf2506bf1, which in
turn reverted 34ea80ec6a02ad02e6b9c75c478c18e5880d6713 (which is thus
re-instated).
Quoth James Bottomley:
"All it's doing is deferring the device_put() from the
scsi_put_command() to after the scsi_run_queue(), which doesn't fix
the sleep while atomic problem of the device release method. In both
cases we still get the semaphore in atomic context problem which is
caused by scsi_reap_target() doing a device_del(), which I assumed
(wrongly) was valid from atomic context."
who also promised to fix scsi_reap_target().
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 4afef5cdcb1..ce9d73a292e 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -542,10 +542,17 @@ static void scsi_requeue_command(struct request_queue *q, struct scsi_cmnd *cmd) void scsi_next_command(struct scsi_cmnd *cmd) { - struct request_queue *q = cmd->device->request_queue; + struct scsi_device *sdev = cmd->device; + struct request_queue *q = sdev->request_queue; + + /* need to hold a reference on the device before we let go of the cmd */ + get_device(&sdev->sdev_gendev); scsi_put_command(cmd); scsi_run_queue(q); + + /* ok to remove device now */ + put_device(&sdev->sdev_gendev); } void scsi_run_host_queues(struct Scsi_Host *shost) |