From: Stefan Bader <shbader@de.ibm.com>
Date: Fri, 15 Dec 2006 16:18:30 +0000 (+0100)
Subject: [S390] cio: css_register_subchannel race.
X-Git-Tag: v2.6.20-rc2~127^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e42734e270b9e5ada83188d73b733533ce11ee4a;p=linux-2.6

[S390] cio: css_register_subchannel race.

Asynchronous probe can release memory of a subchannel before
css_get_ssd_info is called. To fix this call css_get_ssd_info
before registering with driver core.

Signed-off-by: Stefan Bader <shbader@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 4c81d89079..9d6c024468 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -139,6 +139,8 @@ css_register_subchannel(struct subchannel *sch)
 	sch->dev.release = &css_subchannel_release;
 	sch->dev.groups = subch_attr_groups;
 
+	css_get_ssd_info(sch);
+
 	/* make it known to the system */
 	ret = css_sch_device_register(sch);
 	if (ret) {
@@ -146,7 +148,6 @@ css_register_subchannel(struct subchannel *sch)
 			__func__, sch->dev.bus_id);
 		return ret;
 	}
-	css_get_ssd_info(sch);
 	return ret;
 }