From: Alain Volmat alain.volmat@st.com
[ 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 --- drivers/i2c/i2c-core-base.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-)
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index cefad0881942..fd3199782b6e 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 @@ static int i2c_device_probe(struct device *dev) 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; }