linux-kernel - [PATCH] sg: add missing sg_init

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Message-ID: <20071024052900.GB12335@osiris.boeblingen.de.ibm.com>
Date:	Wed, 24 Oct 2007 07:29:00 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Christoph Schmitt <schmichr@...ibm.com>,
	Swen Schillig <swen@...t.ibm.com>,
	linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org
Subject: [PATCH] sg: add missing sg_init_table calls to zfcp

From: Heiko Carstens <heiko.carstens@...ibm.com>

CONFIG_DEBUG_SG reveals two missing sg_init_table calls. Add them.

kernel BUG at include/linux/scatterlist.h:50!
illegal operation: 0001 [#1]
[...]
Call Trace:
([<000000000026f184>] zfcp_ns_gid_pn_request+0x4c/0x2a0)
 [<0000000000276dd4>] zfcp_erp_strategy_do_action+0x1410/0x1938
 [<0000000000278412>] zfcp_erp_thread+0x4fa/0x1430
 [<000000000001990a>] kernel_thread_starter+0x6/0xc
 [<0000000000019904>] kernel_thread_starter+0x0/0xc

Cc: Swen Schillig <swen@...t.ibm.com>
Cc: Christof Schmitt <christof.schmitt@...ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
---

Jens, could you please push this one via your tree? Thanks!

 drivers/s390/scsi/zfcp_aux.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-2.6/drivers/s390/scsi/zfcp_aux.c
===================================================================
--- linux-2.6.orig/drivers/s390/scsi/zfcp_aux.c
+++ linux-2.6/drivers/s390/scsi/zfcp_aux.c
@@ -1518,6 +1518,8 @@ zfcp_gid_pn_buffers_alloc(struct zfcp_gi
                 return -ENOMEM;
 
 	memset(data, 0, sizeof(*data));
+	sg_init_table(&data->req , 1);
+	sg_init_table(&data->resp , 1);
         data->ct.req = &data->req;
         data->ct.resp = &data->resp;
 	data->ct.req_count = data->ct.resp_count = 1;
-
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