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SubjectRe: [PATCH stable 5.4] usb: host: xhci-plat: add wakeup entry at sysfs
On Wed, Feb 01, 2023 at 09:44:04AM -0800, Florian Fainelli wrote:
> From: Peter Chen <peter.chen@nxp.com>
>
> commit 4bb4fc0dbfa23acab9b762949b91ffd52106fe4b upstream
>
> With this change, there will be a wakeup entry at /sys/../power/wakeup,
> and the user could use this entry to choose whether enable xhci wakeup
> features (wake up system from suspend) or not.
>
> Tested-by: Matthias Kaehlcke <mka@chromium.org>
> Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> Signed-off-by: Peter Chen <peter.chen@nxp.com>
> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
> Link: https://lore.kernel.org/r/20200918131752.16488-6-mathias.nyman@linux.intel.com
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
> ---
> drivers/usb/host/xhci-plat.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

Why is this new feature needed on these older kernels? What does it fix
that is broken?

And why not just use a newer kernel release if you want to use this
feature?

thanks,

greg k-h

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