linux-kernel - [patch] [SCSI] qla4xxx: don't free pool that wasn't allocated

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Message-ID: <20120517071120.GG14660@elgon.mountain>
Date:	Thu, 17 May 2012 10:11:20 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Ravi Anand <ravi.anand@...gic.com>
Cc:	Vikas Chaudhary <vikas.chaudhary@...gic.com>,
	iscsi-driver@...gic.com,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] [SCSI] qla4xxx: don't free pool that wasn't allocated

In the original code if dma_pool_alloc() fails then we call
dma_pool_free().  The problem is that "chap_table" is NULL and
"chap_dma" is uninitialized so it will cause an error.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/scsi/qla4xxx/ql4_mbx.c b/drivers/scsi/qla4xxx/ql4_mbx.c
index 7ac21da..21dce92 100644
--- a/drivers/scsi/qla4xxx/ql4_mbx.c
+++ b/drivers/scsi/qla4xxx/ql4_mbx.c
@@ -1329,10 +1329,8 @@ int qla4xxx_get_chap(struct scsi_qla_host *ha, char *username, char *password,
 	dma_addr_t chap_dma;
 
 	chap_table = dma_pool_alloc(ha->chap_dma_pool, GFP_KERNEL, &chap_dma);
-	if (chap_table == NULL) {
-		ret = -ENOMEM;
-		goto exit_get_chap;
-	}
+	if (chap_table == NULL)
+		return -ENOMEM;
 
 	chap_size = sizeof(struct ql4_chap_table);
 	memset(chap_table, 0, chap_size);
--
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