[PATCH 4.19 375/425] usb: xhci: Increase timeout for HC halt

[Greg Kroah-Hartman]

From: Maximilian Luz <luzmaximilian@xxxxxxxxx>

commit ca09b1bea63ab83f4cca3a2ae8bc4f597ec28851 upstream.

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@xxxxxxxxxxxxxxx>
Signed-off-by: Maximilian Luz <luzmaximilian@xxxxxxxxx>
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210512080816.866037-5-mathias.nyman@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/host/xhci-ext-caps.h |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- 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)