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Commit 7cbf41a2 authored by Xiaojun Sang's avatar Xiaojun Sang
Browse files

ASoC: soundwire: add null check before pointer dereference. 



Pointer to soundwire register map returned from
dev_get_name may be null.
Add null check before dereference.

CRs-Fixed: 1059492
Change-Id: I0d96a64b866f4ef10e237e8780fefbd8139a878d
Signed-off-by: default avatarXiaojun Sang <xsang@codeaurora.org>
parent 4e2a8a0f

drivers/base/regmap/regmap-swr.c

+12 −2
Original line number Diff line number Diff line
@@ -28,11 +28,16 @@ static int regmap_swr_gather_write(void *context, 
	struct device *dev = context;

	struct swr_device *swr = to_swr_device(dev);

	struct regmap *map = dev_get_regmap(dev, NULL);

	size_t addr_bytes = map->format.reg_bytes;

	size_t addr_bytes;

	size_t val_bytes;

	int i, ret = 0;

	u16 reg_addr = 0;



	if (map == NULL) {

		dev_err(dev, "%s: regmap is NULL\n", __func__);

		return -EINVAL;

	}

	addr_bytes = map->format.reg_bytes;

	if (swr == NULL) {

		dev_err(dev, "%s: swr device is NULL\n", __func__);

		return -EINVAL;
@@ -154,10 +159,15 @@ static int regmap_swr_read(void *context, 
	struct device *dev = context;

	struct swr_device *swr = to_swr_device(dev);

	struct regmap *map = dev_get_regmap(dev, NULL);

	size_t addr_bytes = map->format.reg_bytes;

	size_t addr_bytes;

	int ret = 0;

	u16 reg_addr = 0;



	if (map == NULL) {

		dev_err(dev, "%s: regmap is NULL\n", __func__);

		return -EINVAL;

	}

	addr_bytes = map->format.reg_bytes;

	if (swr == NULL) {

		dev_err(dev, "%s: swr is NULL\n", __func__);

		return -EINVAL;