linux-kernel - [PATCH v2 1/2] mtd: rawnand: meson: add missing ENOMEM check in meson_nfc_read

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Date:   Mon, 18 Mar 2019 21:47:21 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     linux-amlogic@...ts.infradead.org, linux-mtd@...ts.infradead.org,
        bbrezillon@...nel.org, miquel.raynal@...tlin.com
Cc:     liang.yang@...ogic.com, richard@....at, jianxin.pan@...ogic.com,
        linux-kernel@...r.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH v2 1/2] mtd: rawnand: meson: add missing ENOMEM check in meson_nfc_read_buf()

kzalloc() can return NULL if memory could not be allocated. Check the
return value of the kzalloc() call in meson_nfc_read_buf() to make it
consistent with other memory allocations within the meson_nand driver.

Fixes: 8fae856c53500a ("mtd: rawnand: meson: add support for Amlogic NAND flash controller")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Acked-by: Liang Yang <liang.yang@...ogic.com>
---
 drivers/mtd/nand/raw/meson_nand.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index 3e8aa71407b5..a1d8506b61c7 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -528,6 +528,9 @@ static int meson_nfc_read_buf(struct nand_chip *nand, u8 *buf, int len)
 	u8 *info;
 
 	info = kzalloc(PER_INFO_BYTE, GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
 	ret = meson_nfc_dma_buffer_setup(nand, buf, len, info,
 					 PER_INFO_BYTE, DMA_FROM_DEVICE);
 	if (ret)
-- 
2.21.0