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[4.2.y-ckt,stable] Patch "usb: host: xhci-rcar: Avoid long wait in xhci_reset()" has been added to the 4.2.y-ckt tree

Message ID 1465482875-22091-1-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa June 9, 2016, 2:34 p.m. UTC
This is a note to let you know that I have just added a patch titled

    usb: host: xhci-rcar: Avoid long wait in xhci_reset()

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    https://git.launchpad.net/~canonical-kernel/linux/+git/linux-stable-ckt/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt12.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

From fbebe97c29c888c5b53f6f50e5e61d05587561e7 Mon Sep 17 00:00:00 2001
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Date: Fri, 6 May 2016 15:20:11 +0900
Subject: usb: host: xhci-rcar: Avoid long wait in xhci_reset()

commit f879fc32aa0c96fbac261b3d857a1239d554ad01 upstream.

The firmware of R-Car USB 3.0 host controller will control the reset.
So, if the xhci driver doesn't do firmware downloading (e.g. kernel
configuration is CONFIG_USB_XHCI_PLATFORM=y and CONFIG_USB_XHCI_RCAR
is not set), the reset of USB 3.0 host controller doesn't work
correctly. Then, the host controller will cause long wait in
xhci_reset() because the CMD_RESET bit of op_regs->command is not
cleared for 10 seconds.

So, this patch modifies the Kconfig to enable both CONFIG_USB_XHCI_PLATFORM
and CONFIG_USB_XHCI_RCAR.

Fixes: 4ac8918f3a7 (usb: host: xhci-plat: add support for the R-Car H2 and M2 xHCI controllers)
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ kamal: backport to 4.2-stable: s/ARCH_RENESAS/ARCH_SHMOBILE/ ]
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/usb/host/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--
2.7.4
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Patch

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 8afc3c1..a69b405 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -33,6 +33,7 @@  config USB_XHCI_PCI

 config USB_XHCI_PLATFORM
 	tristate
+	select USB_XHCI_RCAR if ARCH_SHMOBILE

 config USB_XHCI_MVEBU
 	tristate "xHCI support for Marvell Armada 375/38x"
@@ -44,7 +45,7 @@  config USB_XHCI_MVEBU

 config USB_XHCI_RCAR
 	tristate "xHCI support for Renesas R-Car SoCs"
-	select USB_XHCI_PLATFORM
+	depends on USB_XHCI_PLATFORM
 	depends on ARCH_SHMOBILE || COMPILE_TEST
 	---help---
 	  Say 'Y' to enable the support for the xHCI host controller