RE: [added to the 3.18 stable tree] usb: host: xhci-rcar: Avoid long wait in xhci_reset()

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Hi,

> From: Sasha Levin
> Sent: Saturday, June 04, 2016 6:46 AM
> 
> From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> 
> This patch has been added to the 3.18 stable tree. If you have any
> objections, please let us know.

As I sent an email for v4.1 stable before,
I also found that this patch doesn't need on v3.18.

Best regards,
Yoshihiro Shimoda

> ===============
> 
> [ Upstream commit f879fc32aa0c96fbac261b3d857a1239d554ad01 ]
> 
> 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)
> Cc: <stable@xxxxxxxxxxxxxxx> # v3.17+
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> Reviewed-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
> ---
>  drivers/usb/host/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index 1e225f5..2f38746 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -33,6 +33,7 @@ config USB_XHCI_PCI
> 
>  config USB_XHCI_PLATFORM
>  	tristate "Generic xHCI driver for a platform device"
> +	select USB_XHCI_RCAR if ARCH_RENESAS
>  	---help---
>  	  Adds an xHCI host driver for a generic platform device, which
>  	  provides a memory space and an irq.
> @@ -51,7 +52,7 @@ 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_RENESAS || COMPILE_TEST
>  	---help---
>  	  Say 'Y' to enable the support for the xHCI host controller
> --
> 2.5.0

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