Commit 25335b30 authored by Mika Westerberg's avatar Mika Westerberg
Browse files

thunderbolt: Check for NVM authentication status after the operation started 



If the NVM authentication fails immediately, like if the firmware
detects that the image is not valid for some reason, better to read the
status once and if set to non-zero fail the operation accordingly.

Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent faa1c615

drivers/thunderbolt/retimer.c

+19 −1
Original line number Diff line number Diff line
@@ -151,6 +151,7 @@ static int tb_retimer_nvm_validate_and_write(struct tb_retimer *rt) 


static int tb_retimer_nvm_authenticate(struct tb_retimer *rt, bool auth_only)

{

	u32 status;

	int ret;



	if (auth_only) {
@@ -159,7 +160,24 @@ static int tb_retimer_nvm_authenticate(struct tb_retimer *rt, bool auth_only) 
			return ret;

	}



	return usb4_port_retimer_nvm_authenticate(rt->port, rt->index);

	ret = usb4_port_retimer_nvm_authenticate(rt->port, rt->index);

	if (ret)

		return ret;



	usleep_range(100, 150);



	/*

	 * Check the status now if we still can access the retimer. It

	 * is expected that the below fails.

	 */

	ret = usb4_port_retimer_nvm_authenticate_status(rt->port, rt->index,

							&status);

	if (!ret) {

		rt->auth_status = status;

		return status ? -EINVAL : 0;

	}



	return 0;

}



static ssize_t device_show(struct device *dev, struct device_attribute *attr,