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Message-ID: <20061215162301.GI4920@skybase>
Date: Fri, 15 Dec 2006 17:23:01 +0100
From: Martin Schwidefsky <schwidefsky@...ibm.com>
To: linux-kernel@...r.kernel.org, shbader@...ibm.com
Subject: [S390] cio: css_register_subchannel race.
From: Stefan Bader <shbader@...ibm.com>
[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@...ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
---
drivers/s390/cio/css.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
diff -urpN linux-2.6/drivers/s390/cio/css.c linux-2.6-patched/drivers/s390/cio/css.c
--- linux-2.6/drivers/s390/cio/css.c 2006-12-15 16:54:55.000000000 +0100
+++ linux-2.6-patched/drivers/s390/cio/css.c 2006-12-15 16:55:14.000000000 +0100
@@ -139,6 +139,8 @@ css_register_subchannel(struct subchanne
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 subchanne
__func__, sch->dev.bus_id);
return ret;
}
- css_get_ssd_info(sch);
return ret;
}
-
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