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| author | Mike Christie <michaelc@cs.wisc.edu> | 2006-05-30 00:37:28 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-06-05 19:12:25 -0400 |
| commit | 3219e5294150aee7d389e19029f49b44fb6b5c9f (patch) | |
| tree | 44236fd9f2eb40d5622cadb126e9f2672b129486 /include/scsi | |
| parent | 040515f53c09047c76ad074dc6a280984dc84b04 (diff) | |
| download | op-kernel-dev-3219e5294150aee7d389e19029f49b44fb6b5c9f.zip op-kernel-dev-3219e5294150aee7d389e19029f49b44fb6b5c9f.tar.gz | |
[SCSI] iscsi: fix writepsace race
We can race and misset the suspend bit if iscsi_write_space is
called then iscsi_send returns with a failure indicating
there is no space.
To handle this this patch returns a error upwards allowing xmitworker
to decide if we need to try and transmit again. For the no
write space case xmitworker will not retry, and instead
let iscsi_write_space queue it back up if needed (this relies
on the work queue code to properly requeue us if needed).
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_transport_iscsi.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index 92129b9..b684426 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -57,8 +57,12 @@ struct iscsi_mgmt_task; * Called from queuecommand with session lock held. * @init_mgmt_task: Initialize a iscsi_mgmt_task and any internal structs. * Called from iscsi_conn_send_generic with xmitmutex. - * @xmit_cmd_task: requests LLD to transfer cmd task - * @xmit_mgmt_task: requests LLD to transfer mgmt task + * @xmit_cmd_task: Requests LLD to transfer cmd task. Returns 0 or the + * the number of bytes transferred on success, and -Exyz + * value on error. + * @xmit_mgmt_task: Requests LLD to transfer mgmt task. Returns 0 or the + * the number of bytes transferred on success, and -Exyz + * value on error. * @cleanup_cmd_task: requests LLD to fail cmd task. Called with xmitmutex * and session->lock after the connection has been * suspended and terminated during recovery. If called |
