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[PATCH 1/1] net: ethernet: qlogic: set error code on failure

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  [PATCH 1/1] net: ethernet: qlogic: set error code on failure Pan Bian <bianpan201603@163.com> - 2016-12-04 07:20 +0100

#1535604 — [PATCH 1/1] net: ethernet: qlogic: set error code on failure

From: Pan Bian <bianpan2016@163.com>

When calling dma_mapping_error(), the value of return variable rc is 0.
And when the call returns an unexpected value, rc is not set to a
negative errno. Thus, it will return 0 on the error path, and its
callers cannot detect the bug. This patch fixes the bug, assigning
"-ENOMEM" to err.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=189041

Signed-off-by: Pan Bian <bianpan2016@163.com>
---
 drivers/net/ethernet/qlogic/qed/qed_ll2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.c b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
index f95385c..62ae55b 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_ll2.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
@@ -1730,6 +1730,7 @@ static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb)
 						       mapping))) {
 				DP_NOTICE(cdev,
 					  "Unable to map frag - dropping packet\n");
+				rc = -ENOMEM;
 				goto err;
 			}
 		} else {
-- 
1.9.1

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