Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | "Christian A. Ehrhardt" <> | Subject | [PATCH 1/5] usb: typec: ucsi: Clear EVENT_PENDING under PPM lock | Date | Wed, 20 Mar 2024 08:39:22 +0100 |
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Suppose we sleep on the PPM lock after clearing the EVENT_PENDING bit because the thread for another connector is executing a command. In this case the command completion of the other command will still report the connector change for our connector.
Clear the EVENT_PENDING bit under the PPM lock to avoid another useless call to ucsi_handle_connector_change() in this case.
Fixes: c9aed03a0a68 ("usb: ucsi: Add missing ppm_lock") Signed-off-by: Christian A. Ehrhardt <lk@c--e.de> --- drivers/usb/typec/ucsi/ucsi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index cf52cb34d285..8a6645ffd938 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -1215,11 +1215,11 @@ static void ucsi_handle_connector_change(struct work_struct *work) if (con->status.change & UCSI_CONSTAT_CAM_CHANGE) ucsi_partner_task(con, ucsi_check_altmodes, 1, 0); - clear_bit(EVENT_PENDING, &con->ucsi->flags); - mutex_lock(&ucsi->ppm_lock); + clear_bit(EVENT_PENDING, &con->ucsi->flags); ret = ucsi_acknowledge_connector_change(ucsi); mutex_unlock(&ucsi->ppm_lock); + if (ret) dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret); -- 2.40.1
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