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usb: typec: ucsi: Clear EVENT_PENDING under PPM lock 

commit 15b2e71b4653b3e13df34695a29ebeee237c5af2 upstream.

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")
Cc: stable <stable@kernel.org>
Signed-off-by: Christian A. Ehrhardt <lk@c--e.de>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Link: https://lore.kernel.org/r/20240320073927.1641788-2-lk@c--e.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian A. Ehrhardt 2024-03-20 08:39:22 +01:00 committed by Greg Kroah-Hartman
parent c708b704c2
commit 68f57d0138
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/typec/ucsi/ucsi.c
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@ -933,11 +933,11 @@ 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);