[PATCH 4.9 104/207] mmc: mxs-mmc: disable regulator on error and in the remove function

Greg Kroah-Hartman
2021-11-24T12:21:39Z

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

[ Upstream commit ce5f6c2c9b0fcb4094f8e162cfd37fb4294204f7 ]

The 'reg_vmmc' regulator is enabled in the probe. It is never disabled.
Neither in the error handling path of the probe nor in the remove
function.

Register a devm_action to disable it when needed.

Fixes: 4dc5a79f1350 ("mmc: mxs-mmc: enable regulator for mmc slot")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/4aadb3c97835f7b80f00819c3d549e6130384e67.1634365151.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mmc/host/mxs-mmc.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 687fd68fbbcd1..77a03301b2a58 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -571,6 +571,11 @@ static const struct of_device_id mxs_mmc_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, mxs_mmc_dt_ids);

+static void mxs_mmc_regulator_disable(void *regulator)
+{
+ regulator_disable(regulator);
+}
+
static int mxs_mmc_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id =
@@ -614,6 +619,11 @@ static int mxs_mmc_probe(struct platform_device *pdev)
"Failed to enable vmmc regulator: %d\n", ret);
goto out_mmc_free;
}
+
+ ret = devm_add_action_or_reset(&pdev->dev, mxs_mmc_regulator_disable,
+ reg_vmmc);
+ if (ret)
+ goto out_mmc_free;
}

ssp->clk = devm_clk_get(&pdev->dev, NULL);
--
2.33.0