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author | Alain Volmat <alain.volmat@st.com> | 2020-04-30 17:43:21 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-27 17:46:15 +0200 |
commit | 33769c19feba67c484350810431db7c62f88923f (patch) | |
tree | 3af17326b51381e7bc8662fa01a7440967b2eb45 | |
parent | 9f885f17501d57fbb45d5de709adc9bf2223d8c7 (diff) | |
download | linux-stable-33769c19feba67c484350810431db7c62f88923f.tar.gz linux-stable-33769c19feba67c484350810431db7c62f88923f.tar.bz2 linux-stable-33769c19feba67c484350810431db7c62f88923f.zip |
i2c: fix missing pm_runtime_put_sync in i2c_device_probe
[ Upstream commit 3c3dd56f760da056e821ac177e3ad0de4209a435 ]
In case of the I2C client exposes the flag I2C_CLIENT_HOST_NOTIFY,
pm_runtime_get_sync is called in order to always keep active the
adapter. However later on, pm_runtime_put_sync is never called
within the function in case of an error. This commit add this
error handling.
Fixes: 72bfcee11cf8 ("i2c: Prevent runtime suspend of adapter when Host Notify is required")
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Reviewed-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r-- | drivers/i2c/i2c-core-base.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 810a942eaa8e..cc193f2ba5d3 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -338,8 +338,10 @@ static int i2c_device_probe(struct device *dev) } else if (ACPI_COMPANION(dev)) { irq = i2c_acpi_get_irq(client); } - if (irq == -EPROBE_DEFER) - return irq; + if (irq == -EPROBE_DEFER) { + status = irq; + goto put_sync_adapter; + } if (irq < 0) irq = 0; @@ -353,15 +355,19 @@ static int i2c_device_probe(struct device *dev) */ if (!driver->id_table && !i2c_acpi_match_device(dev->driver->acpi_match_table, client) && - !i2c_of_match_device(dev->driver->of_match_table, client)) - return -ENODEV; + !i2c_of_match_device(dev->driver->of_match_table, client)) { + status = -ENODEV; + goto put_sync_adapter; + } if (client->flags & I2C_CLIENT_WAKE) { int wakeirq; wakeirq = of_irq_get_byname(dev->of_node, "wakeup"); - if (wakeirq == -EPROBE_DEFER) - return wakeirq; + if (wakeirq == -EPROBE_DEFER) { + status = wakeirq; + goto put_sync_adapter; + } device_init_wakeup(&client->dev, true); @@ -408,6 +414,10 @@ err_detach_pm_domain: err_clear_wakeup_irq: dev_pm_clear_wake_irq(&client->dev); device_init_wakeup(&client->dev, false); +put_sync_adapter: + if (client->flags & I2C_CLIENT_HOST_NOTIFY) + pm_runtime_put_sync(&client->adapter->dev); + return status; } |