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path: root/drivers/scsi/scsi_transport_fc.c
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Diffstat (limited to 'drivers/scsi/scsi_transport_fc.c')
-rw-r--r--drivers/scsi/scsi_transport_fc.c30
1 files changed, 23 insertions, 7 deletions
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 6cfffc88022..06813789145 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -834,7 +834,7 @@ static ssize_t
store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- int val;
+ unsigned long val;
struct fc_rport *rport = transport_class_to_rport(dev);
struct Scsi_Host *shost = rport_to_shost(rport);
struct fc_internal *i = to_fc_internal(shost->transportt);
@@ -848,6 +848,12 @@ store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
return -EINVAL;
/*
+ * Check for overflow; dev_loss_tmo is u32
+ */
+ if (val > UINT_MAX)
+ return -EINVAL;
+
+ /*
* If fast_io_fail is off we have to cap
* dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
*/
@@ -2865,7 +2871,7 @@ void
fc_remote_port_delete(struct fc_rport *rport)
{
struct Scsi_Host *shost = rport_to_shost(rport);
- int timeout = rport->dev_loss_tmo;
+ unsigned long timeout = rport->dev_loss_tmo;
unsigned long flags;
/*
@@ -3191,23 +3197,33 @@ fc_scsi_scan_rport(struct work_struct *work)
*
* This routine can be called from a FC LLD scsi_eh callback. It
* blocks the scsi_eh thread until the fc_rport leaves the
- * FC_PORTSTATE_BLOCKED. This is necessary to avoid the scsi_eh
- * failing recovery actions for blocked rports which would lead to
- * offlined SCSI devices.
+ * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
+ * necessary to avoid the scsi_eh failing recovery actions for blocked
+ * rports which would lead to offlined SCSI devices.
+ *
+ * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
+ * FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
+ * passed back to scsi_eh.
*/
-void fc_block_scsi_eh(struct scsi_cmnd *cmnd)
+int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
unsigned long flags;
spin_lock_irqsave(shost->host_lock, flags);
- while (rport->port_state == FC_PORTSTATE_BLOCKED) {
+ while (rport->port_state == FC_PORTSTATE_BLOCKED &&
+ !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
spin_unlock_irqrestore(shost->host_lock, flags);
msleep(1000);
spin_lock_irqsave(shost->host_lock, flags);
}
spin_unlock_irqrestore(shost->host_lock, flags);
+
+ if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
+ return FAST_IO_FAIL;
+
+ return 0;
}
EXPORT_SYMBOL(fc_block_scsi_eh);