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| author | Chuhong Yuan <hslester96@gmail.com> | 2019-10-15 16:59:15 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-10-25 00:48:56 +0300 |
| commit | a0219deefe9ee5006a28d48522f76b217d198c51 (patch) | |
| tree | 360fea14b0de5460333dc1ad78307cfde169fd17 | |
| parent | 61c03b631b74a38ab53753f3ee971a55886d4843 (diff) | |
| download | linux-a0219deefe9ee5006a28d48522f76b217d198c51.tar.xz | |
media: imx7-mipi-csis: Add a check for devm_regulator_get
devm_regulator_get may return an error but mipi_csis_phy_init misses
a check for it.
This may lead to problems when regulator_set_voltage uses the unchecked
pointer.
This patch adds a check for devm_regulator_get to avoid potential risk.
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
| -rw-r--r-- | drivers/staging/media/imx/imx7-mipi-csis.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c b/drivers/staging/media/imx/imx7-mipi-csis.c index 7477e58054b2..70b830de0ea5 100644 --- a/drivers/staging/media/imx/imx7-mipi-csis.c +++ b/drivers/staging/media/imx/imx7-mipi-csis.c @@ -350,6 +350,8 @@ static void mipi_csis_sw_reset(struct csi_state *state) static int mipi_csis_phy_init(struct csi_state *state) { state->mipi_phy_regulator = devm_regulator_get(state->dev, "phy"); + if (IS_ERR(state->mipi_phy_regulator)) + return PTR_ERR(state->mipi_phy_regulator); return regulator_set_voltage(state->mipi_phy_regulator, 1000000, 1000000); @@ -956,7 +958,10 @@ static int mipi_csis_probe(struct platform_device *pdev) return ret; } - mipi_csis_phy_init(state); + ret = mipi_csis_phy_init(state); + if (ret < 0) + return ret; + mipi_csis_phy_reset(state); state->regs = devm_platform_ioremap_resource(pdev, 0); |