5.15-stable review patch. If anyone has any objections, please let me know.
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From: Lars-Peter Clausen lars@metafoo.de
[ Upstream commit d663d93bb47e7ab45602b227701022d8aa16040a ]
The xiic_xfer() function gets a runtime PM reference when the function is entered. This reference is released when the function is exited. There is currently one error path where the function exits directly, which leads to a leak of the runtime PM reference.
Make sure that this error path also releases the runtime PM reference.
Fixes: fdacc3c7405d ("i2c: xiic: Switch from waitqueue to completion") Signed-off-by: Lars-Peter Clausen lars@metafoo.de Reviewed-by: Michal Simek michal.simek@amd.com Signed-off-by: Wolfram Sang wsa@kernel.org Stable-dep-of: 1d4a1adbed25 ("i2c: xiic: Try re-initialization on bus busy timeout") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i2c/busses/i2c-xiic.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c index 3444e4d017f7f..695233db07acd 100644 --- a/drivers/i2c/busses/i2c-xiic.c +++ b/drivers/i2c/busses/i2c-xiic.c @@ -744,7 +744,7 @@ static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) err = xiic_start_xfer(i2c, msgs, num); if (err < 0) { dev_err(adap->dev.parent, "Error xiic_start_xfer\n"); - return err; + goto out; }
err = wait_for_completion_timeout(&i2c->completion, XIIC_XFER_TIMEOUT); @@ -762,6 +762,8 @@ static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) err = (i2c->state == STATE_DONE) ? num : -EIO; } mutex_unlock(&i2c->lock); + +out: pm_runtime_mark_last_busy(i2c->dev); pm_runtime_put_autosuspend(i2c->dev); return err;