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s390/blacklist: Perform subchannel scan only when needed

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Move scheduling of a subchannel scan to those instances where new
devices may actually have become available. This reduces unnecessary
scan work in case devices were added to the blacklist.

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter 2013-11-26 15:00:37 +01:00 committed by Martin Schwidefsky
parent 47d30674d6
commit e6b2551425
1 changed files with 3 additions and 3 deletions
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6
drivers/s390/cio/blacklist.c
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@ -260,16 +260,16 @@ static int blacklist_parse_proc_parameters(char *buf)
parm = strsep(&buf, " ");
if (strcmp("free", parm) == 0)
if (strcmp("free", parm) == 0) {
rc = blacklist_parse_parameters(buf, free, 0);
else if (strcmp("add", parm) == 0)
css_schedule_eval_all_unreg(0);
} else if (strcmp("add", parm) == 0)
rc = blacklist_parse_parameters(buf, add, 0);
else if (strcmp("purge", parm) == 0)
return ccw_purge_blacklisted();
else
return -EINVAL;
css_schedule_eval_all_unreg(0);
return rc;
}