From: Michal Pecio <michal.pecio@gmail.com>
To: Mathias Nyman <mathias.nyman@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] usb: xhci: Update a comment about Stop Endpoint retries
Date: Wed, 20 Aug 2025 16:08:55 +0200 [thread overview]
Message-ID: <20250820160855.06ad74aa@foxbook> (raw)
In-Reply-To: <20250820160746.74276b40@foxbook>
Retries are no longer gated by a quirk, so remove that part.
Add a brief explanation of the timeout.
Signed-off-by: Michal Pecio <michal.pecio@gmail.com>
---
drivers/usb/host/xhci-ring.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 3fef6454f3be..9389645a1dd5 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1262,8 +1262,9 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
* Stopped state, but it will soon change to Running.
*
* Assume this bug on unexpected Stop Endpoint failures.
- * Keep retrying until the EP starts and stops again, on
- * chips where this is known to help. Wait for 100ms.
+ * Keep retrying until the EP starts and stops again or
+ * up to a timeout (a defective HC may never start, or a
+ * driver bug may cause stopping an already stopped EP).
*/
if (time_is_before_jiffies(ep->stop_time + msecs_to_jiffies(100)))
break;
--
2.48.1
prev parent reply other threads:[~2025-08-20 14:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-20 14:07 [PATCH 1/2] Revert "usb: xhci: Avoid Stop Endpoint retry loop if the endpoint seems Running" Michal Pecio
2025-08-20 14:08 ` Michal Pecio [this message]
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