linux-kernel - [PATCH] sfc: should check the return value after allocating memory

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Message-ID: <1572426765-43211-1-git-send-email-zhongjiang@huawei.com>
Date:   Wed, 30 Oct 2019 17:12:45 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <davem@...emloft.net>
CC:     <ecree@...arflare.com>, <mhabets@...arflare.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <zhongjiang@...wei.com>
Subject: [PATCH] sfc: should check the return value after allocating memory

kcalloc may fails to allocate memory, hence if it is in that case,
We should drop out in time.

Signed-off-by: zhong jiang <zhongjiang@...wei.com>
---
 drivers/net/ethernet/sfc/efx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index 2fef740..712380a 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -3040,6 +3040,8 @@ static int efx_init_struct(struct efx_nic *efx,
 	/* Failure to allocate is not fatal, but may degrade ARFS performance */
 	efx->rps_hash_table = kcalloc(EFX_ARFS_HASH_TABLE_SIZE,
 				      sizeof(*efx->rps_hash_table), GFP_KERNEL);
+	if (!efx->rps_hash_table)
+		goto fail;
 #endif
 	efx->phy_op = &efx_dummy_phy_operations;
 	efx->mdio.dev = net_dev;
-- 
1.7.12.4