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authorJulia Lawall <Julia.Lawall@lip6.fr>2012-09-04 15:23:33 +0200
committerJames Bottomley <JBottomley@Parallels.com>2012-09-24 12:11:02 +0400
commitca579c9f136af4274ccfd1bcaee7f38a29a0e2e9 (patch)
treedffc2877f9ebe9adcb69bf4821d976357098b11c /drivers/s390/scsi
parentcb45214960bc989af8b911ebd77da541c797717d (diff)
[SCSI] zfcp: remove invalid reference to list iterator variable
If list_for_each_entry, etc complete a traversal of the list, the iterator variable ends up pointing to an address at an offset from the list head, and not a meaningful structure. Thus this value should not be used after the end of the iterator. Replace port->adapter->scsi_host by adapter->scsi_host. This problem was found using Coccinelle (http://coccinelle.lip6.fr/). Oversight in upsteam commit of v2.6.37 a1ca48319a9aa1c5b57ce142f538e76050bb8972 "[SCSI] zfcp: Move ACL/CFDC code to zfcp_cfdc.c" which merged the content of zfcp_erp_port_access_changed(). Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Martin Peschke <mpeschke@linux.vnet.ibm.com> Cc: <stable@vger.kernel.org> #2.6.37+ Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/s390/scsi')
-rw-r--r--drivers/s390/scsi/zfcp_cfdc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c
index fbd8b4db602..49b82e46629 100644
--- a/drivers/s390/scsi/zfcp_cfdc.c
+++ b/drivers/s390/scsi/zfcp_cfdc.c
@@ -293,7 +293,7 @@ void zfcp_cfdc_adapter_access_changed(struct zfcp_adapter *adapter)
}
read_unlock_irqrestore(&adapter->port_list_lock, flags);
- shost_for_each_device(sdev, port->adapter->scsi_host) {
+ shost_for_each_device(sdev, adapter->scsi_host) {
zfcp_sdev = sdev_to_zfcp(sdev);
status = atomic_read(&zfcp_sdev->status);
if ((status & ZFCP_STATUS_COMMON_ACCESS_DENIED) ||