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| author | Andreas Herrmann <aherrman@de.ibm.com> | 2005-06-13 13:20:35 +0200 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-06-13 21:32:48 -0500 |
| commit | 1db2c9c0931a53fe013db55fd2ff58859db31e8d (patch) | |
| tree | 1134627ac98d91896dcdb161d5df7ecef60a4de3 /drivers/s390/scsi/zfcp_aux.c | |
| parent | 64b29a130901d5b8578e9f602cf2dae56aaff224 (diff) | |
| download | op-kernel-dev-1db2c9c0931a53fe013db55fd2ff58859db31e8d.zip op-kernel-dev-1db2c9c0931a53fe013db55fd2ff58859db31e8d.tar.gz | |
[SCSI] zfcp: fix bug during adapter shutdown
Fixes a race between zfcp_fsf_req_dismiss_all and
zfcp_qdio_reqid_check. During adapter shutdown it occurred that a
request was cleaned up twice. First during its normal
completion. Second when dismiss_all was called. The fix is to
serialize access to fsf request list between zfcp_fsf_req_dismiss_all
and zfcp_qdio_reqid_check and delete a fsf request from the list if
its completion is triggered. (Additionally a rwlock was replaced by a
spinlock and fsf_req_cleanup was eliminated.)
Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/s390/scsi/zfcp_aux.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 6bb4d33..c999042 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -520,7 +520,7 @@ zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command, out: if (fsf_req != NULL) - zfcp_fsf_req_cleanup(fsf_req); + zfcp_fsf_req_free(fsf_req); if ((adapter != NULL) && (retval != -ENXIO)) zfcp_adapter_put(adapter); @@ -1149,7 +1149,7 @@ zfcp_adapter_enqueue(struct ccw_device *ccw_device) INIT_LIST_HEAD(&adapter->port_remove_lh); /* initialize list of fsf requests */ - rwlock_init(&adapter->fsf_req_list_lock); + spin_lock_init(&adapter->fsf_req_list_lock); INIT_LIST_HEAD(&adapter->fsf_req_list_head); /* initialize abort lock */ @@ -1234,9 +1234,9 @@ zfcp_adapter_dequeue(struct zfcp_adapter *adapter) zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev); dev_set_drvdata(&adapter->ccw_device->dev, NULL); /* sanity check: no pending FSF requests */ - read_lock_irqsave(&adapter->fsf_req_list_lock, flags); + spin_lock_irqsave(&adapter->fsf_req_list_lock, flags); retval = !list_empty(&adapter->fsf_req_list_head); - read_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); + spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags); if (retval) { ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, " "%i requests outstanding\n", |
