From: <gregkh@linuxfoundation.org>
To: luzmaximilian@gmail.com, gregkh@linuxfoundation.org,
mathias.nyman@linux.intel.com, stable@vger.kernel.org
Subject: patch "usb: xhci: Increase timeout for HC halt" added to usb-linus
Date: Thu, 13 May 2021 14:47:55 +0200 [thread overview]
Message-ID: <1620910075197231@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
usb: xhci: Increase timeout for HC halt
to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
From ca09b1bea63ab83f4cca3a2ae8bc4f597ec28851 Mon Sep 17 00:00:00 2001
From: Maximilian Luz <luzmaximilian@gmail.com>
Date: Wed, 12 May 2021 11:08:15 +0300
Subject: usb: xhci: Increase timeout for HC halt
On some devices (specifically the SC8180x based Surface Pro X with
QCOM04A6) HC halt / xhci_halt() times out during boot. Manually binding
the xhci-hcd driver at some point later does not exhibit this behavior.
To work around this, double XHCI_MAX_HALT_USEC, which also resolves this
issue.
Cc: <stable@vger.kernel.org>
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210512080816.866037-5-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/xhci-ext-caps.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-ext-caps.h b/drivers/usb/host/xhci-ext-caps.h
index fa59b242cd51..e8af0a125f84 100644
--- a/drivers/usb/host/xhci-ext-caps.h
+++ b/drivers/usb/host/xhci-ext-caps.h
@@ -7,8 +7,9 @@
* Author: Sarah Sharp
* Some code borrowed from the Linux EHCI driver.
*/
-/* Up to 16 ms to halt an HC */
-#define XHCI_MAX_HALT_USEC (16*1000)
+
+/* HC should halt within 16 ms, but use 32 ms as some hosts take longer */
+#define XHCI_MAX_HALT_USEC (32 * 1000)
/* HC not running - set to 1 when run/stop bit is cleared. */
#define XHCI_STS_HALT (1<<0)
--
2.31.1
reply other threads:[~2021-05-13 12:48 UTC|newest]
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