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[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>
This commit is contained in:
Matthew Wilcox 2007-08-20 09:18:48 -06:00 committed by James Bottomley
parent 31765d7d3d
commit a57b1fccdf
1 changed files with 4 additions and 1 deletions
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5
drivers/scsi/scsi_scan.c
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@ -1799,6 +1799,7 @@ static int do_scan_async(void *_data)
**/ **/
void scsi_scan_host(struct Scsi_Host *shost) void scsi_scan_host(struct Scsi_Host *shost)
{ {
struct task_struct *p;
struct async_scan_data *data; struct async_scan_data *data;
if (strncmp(scsi_scan_type, "none", 4) == 0) if (strncmp(scsi_scan_type, "none", 4) == 0)
@ -1810,7 +1811,9 @@ void scsi_scan_host(struct Scsi_Host *shost)
return; 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); EXPORT_SYMBOL(scsi_scan_host);