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usb: typec: ucsi: Optimise ucsi_unregister() 

There is no need to reset the PPM when the interface is
unregistered. Quietly silencing the notifications and then
unregistering everything is enough. This speeds up
ucsi_unregister() a lot.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Ajay Gupta <ajayg@nvidia.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20191104142435.29960-19-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Heikki Krogerus 2019-11-04 17:24:35 +03:00 committed by Greg Kroah-Hartman
parent e716bb38ed
commit 74ce3e4127
1 changed files with 3 additions and 6 deletions
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9
drivers/usb/typec/ucsi/ucsi.c
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@ -1045,15 +1045,14 @@ EXPORT_SYMBOL_GPL(ucsi_register);
*/
void ucsi_unregister(struct ucsi *ucsi)
{
u64 command;
u64 cmd = UCSI_SET_NOTIFICATION_ENABLE;
int i;
/* Make sure that we are not in the middle of driver initialization */
cancel_work_sync(&ucsi->work);
/* Disable everything except command complete notification */
command = UCSI_SET_NOTIFICATION_ENABLE | UCSI_ENABLE_NTFY_CMD_COMPLETE;
ucsi_send_command(ucsi, command, NULL, 0);
/* Disable notifications */
ucsi->ops->async_write(ucsi, UCSI_CONTROL, &cmd, sizeof(cmd));
for (i = 0; i < ucsi->cap.num_connectors; i++) {
cancel_work_sync(&ucsi->connector[i].work);
@ -1063,8 +1062,6 @@ void ucsi_unregister(struct ucsi *ucsi)
typec_unregister_port(ucsi->connector[i].port);
}
ucsi_reset_ppm(ucsi);
kfree(ucsi->connector);
}
EXPORT_SYMBOL_GPL(ucsi_unregister);