[SCSI] scsi_scan: Cope with kthread_run failing
If kthread_run failed, we would fail to scan the host, and leak the
allocated async_scan_data. Since using a separate thread is just an
optimisation, do the scan synchronously if we fail to spawn a thread.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 20df7fe..b53c5f6 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -1799,6 +1799,7 @@
**/
void scsi_scan_host(struct Scsi_Host *shost)
{
+ struct task_struct *p;
struct async_scan_data *data;
if (strncmp(scsi_scan_type, "none", 4) == 0)
@@ -1810,7 +1811,9 @@
return;
}
- kthread_run(do_scan_async, data, "scsi_scan_%d", shost->host_no);
+ p = kthread_run(do_scan_async, data, "scsi_scan_%d", shost->host_no);
+ if (unlikely(IS_ERR(p)))
+ do_scan_async(data);
}
EXPORT_SYMBOL(scsi_scan_host);