From: Christophe JAILLET christophe.jaillet@wanadoo.fr
stable inclusion from stable-v6.6.33 commit cd99864e1f7f6fcb166201ba9de4c84a54d00bd9 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAD6H2
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 55750148e5595bb85605e8fbb40b2759c2c4c2d7 ]
If an error occurs after the clk_prepare_enable() call, it should be undone by a corresponding clk_disable_unprepare() call, as already done in the remove() function.
As devm_clk_get() is used, we can switch to devm_clk_get_enabled() to handle it automatically and fix the probe.
Update the remove() function accordingly and remove the now useless clk_disable_unprepare() call.
Fixes: 0d676a6c4390 ("i2c: add support for Socionext SynQuacer I2C controller") Signed-off-by: Christophe JAILLET christophe.jaillet@wanadoo.fr Acked-by: Ard Biesheuvel ardb@kernel.org Signed-off-by: Andi Shyti andi.shyti@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Wang Hai wanghai38@huawei.com --- drivers/i2c/busses/i2c-synquacer.c | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-)
diff --git a/drivers/i2c/busses/i2c-synquacer.c b/drivers/i2c/busses/i2c-synquacer.c index bbea521b05dd..a73f5bb9a164 100644 --- a/drivers/i2c/busses/i2c-synquacer.c +++ b/drivers/i2c/busses/i2c-synquacer.c @@ -550,17 +550,13 @@ static int synquacer_i2c_probe(struct platform_device *pdev) device_property_read_u32(&pdev->dev, "socionext,pclk-rate", &i2c->pclkrate);
- i2c->pclk = devm_clk_get(&pdev->dev, "pclk"); - if (PTR_ERR(i2c->pclk) == -EPROBE_DEFER) - return -EPROBE_DEFER; - if (!IS_ERR_OR_NULL(i2c->pclk)) { - dev_dbg(&pdev->dev, "clock source %p\n", i2c->pclk); - - ret = clk_prepare_enable(i2c->pclk); - if (ret) - return dev_err_probe(&pdev->dev, ret, "failed to enable clock\n"); - i2c->pclkrate = clk_get_rate(i2c->pclk); - } + i2c->pclk = devm_clk_get_enabled(&pdev->dev, "pclk"); + if (IS_ERR(i2c->pclk)) + return dev_err_probe(&pdev->dev, PTR_ERR(i2c->pclk), + "failed to get and enable clock\n"); + + dev_dbg(&pdev->dev, "clock source %p\n", i2c->pclk); + i2c->pclkrate = clk_get_rate(i2c->pclk);
if (i2c->pclkrate < SYNQUACER_I2C_MIN_CLK_RATE || i2c->pclkrate > SYNQUACER_I2C_MAX_CLK_RATE) @@ -615,8 +611,6 @@ static void synquacer_i2c_remove(struct platform_device *pdev) struct synquacer_i2c *i2c = platform_get_drvdata(pdev);
i2c_del_adapter(&i2c->adapter); - if (!IS_ERR(i2c->pclk)) - clk_disable_unprepare(i2c->pclk); };
static const struct of_device_id synquacer_i2c_dt_ids[] __maybe_unused = {