This is a note to let you know that I've just added the patch titled
thunderbolt: Read retimer NVM authentication status prior tb_retimer_set_inbound_sbtx()
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
thunderbolt-read-retimer-nvm-authentication-status-p.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6cf97c06d9a7463c67e619a044b444e0dde64304
Author: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Date: Fri May 26 14:46:44 2023 +0300
thunderbolt: Read retimer NVM authentication status prior tb_retimer_set_inbound_sbtx()
[ Upstream commit 1402ba08abae5cfa583ff1a40b99c098a0532d41 ]
According to the USB4 retimer guide the correct order is immediately
after sending ENUMERATE_RETIMERS so update the code to follow this.
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/thunderbolt/retimer.c b/drivers/thunderbolt/retimer.c
index 9cc28197dbc45..edbd92435b41a 100644
--- a/drivers/thunderbolt/retimer.c
+++ b/drivers/thunderbolt/retimer.c
@@ -187,6 +187,21 @@ static ssize_t nvm_authenticate_show(struct device *dev,
return ret;
}
+static void tb_retimer_nvm_authenticate_status(struct tb_port *port, u32 *status)
+{
+ int i;
+
+ tb_port_dbg(port, "reading NVM authentication status of retimers\n");
+
+ /*
+ * Before doing anything else, read the authentication status.
+ * If the retimer has it set, store it for the new retimer
+ * device instance.
+ */
+ for (i = 1; i <= TB_MAX_RETIMER_INDEX; i++)
+ usb4_port_retimer_nvm_authenticate_status(port, i, &status[i]);
+}
+
static void tb_retimer_set_inbound_sbtx(struct tb_port *port)
{
int i;
@@ -455,18 +470,16 @@ int tb_retimer_scan(struct tb_port *port, bool add)
return ret;
/*
- * Enable sideband channel for each retimer. We can do this
- * regardless whether there is device connected or not.
+ * Immediately after sending enumerate retimers read the
+ * authentication status of each retimer.
*/
- tb_retimer_set_inbound_sbtx(port);
+ tb_retimer_nvm_authenticate_status(port, status);
/*
- * Before doing anything else, read the authentication status.
- * If the retimer has it set, store it for the new retimer
- * device instance.
+ * Enable sideband channel for each retimer. We can do this
+ * regardless whether there is device connected or not.
*/
- for (i = 1; i <= TB_MAX_RETIMER_INDEX; i++)
- usb4_port_retimer_nvm_authenticate_status(port, i, &status[i]);
+ tb_retimer_set_inbound_sbtx(port);
for (i = 1; i <= TB_MAX_RETIMER_INDEX; i++) {
/*
