linux-kernel - [PATCH] net: qlogic: check the return value of dma_alloc_coherent() in qed_vf_hw

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Date:   Wed,  2 Mar 2022 19:34:50 -0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     aelior@...vell.com, manishc@...vell.com, davem@...emloft.net,
        kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] net: qlogic: check the return value of dma_alloc_coherent() in qed_vf_hw_prepare()

The function dma_alloc_coherent() in qed_vf_hw_prepare() can fail, so
its return value should be checked.

Fixes: 1408cc1fa48c ("qed: Introduce VFs")
Reported-by: TOTE Robot <oslab@...nghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 drivers/net/ethernet/qlogic/qed/qed_vf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_vf.c b/drivers/net/ethernet/qlogic/qed/qed_vf.c
index 597cd9cd57b5..5786d7ab6310 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_vf.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_vf.c
@@ -513,6 +513,9 @@ int qed_vf_hw_prepare(struct qed_hwfn *p_hwfn)
 						    p_iov->bulletin.size,
 						    &p_iov->bulletin.phys,
 						    GFP_KERNEL);
+	if (!p_iov->bulletin.p_virt)
+		goto free_vf2pf_request;
+
 	DP_VERBOSE(p_hwfn, QED_MSG_IOV,
 		   "VF's bulletin Board [%p virt 0x%llx phys 0x%08x bytes]\n",
 		   p_iov->bulletin.p_virt,
-- 
2.17.1