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scsi_scan: don't dump trace when scsi_prep_async_scan() is called twice

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The only user of scsi_prep_async_scan() is scsi_scan_host() and it
handles the situation correctly. Move 'called twice' reporting to debug
level as well.

The issue is observed on Hyper-V: on any device add/remove event storvsc
driver calls scsi_scan_host() and in case previous scan is still running
we get the message and stack dump on console.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Alex Ng <alexng@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Vitaly Kuznetsov 2015-10-30 12:37:49 +01:00 committed by Martin K. Petersen
parent abc01f7d54
commit a4cf30e15c
1 changed files with 1 additions and 2 deletions
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3
drivers/scsi/scsi_scan.c
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@ -1713,8 +1713,7 @@ static struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost)
return NULL;
if (shost->async_scan) {
shost_printk(KERN_INFO, shost, "%s called twice\n", __func__);
dump_stack();
shost_printk(KERN_DEBUG, shost, "%s called twice\n", __func__);
return NULL;
}