linux-kernel - Re: [patch 05/12] usb: xhci: Remove in

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Date:   Fri, 23 Oct 2020 16:38:57 +0300
From:   Mathias Nyman <mathias.nyman@...ux.intel.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        "Ahmed S. Darwish" <a.darwish@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org,
        Thomas Winischhofer <thomas@...ischhofer.net>,
        Johan Hovold <johan@...nel.org>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        linux-omap@...r.kernel.org, Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, Felipe Balbi <balbi@...nel.org>,
        Duncan Sands <duncan.sands@...e.fr>
Subject: Re: [patch 05/12] usb: xhci: Remove in_interrupt() checks

On 14.10.2020 17.52, Thomas Gleixner wrote:
> From: Ahmed S. Darwish <a.darwish@...utronix.de>
> 
> The usage of in_interrupt() in drivers is phased out for various reasons.
> 
> xhci_set_hc_event_deq() has an !in_interrupt() check which is pointless
> because the function is only invoked from xhci_mem_init() which is clearly
> task context as it does GFP_KERNEL allocations. Remove it.
> 
> xhci_urb_enqueue() prints a debug message if an URB is submitted after the
> underlying hardware was suspended. But that warning is only issued when
> in_interrupt() is true, which makes no sense. Simply return -ESHUTDOWN and
> be done with it.
> 
> Signed-off-by: Ahmed S. Darwish <a.darwish@...utronix.de>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Mathias Nyman <mathias.nyman@...el.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: linux-usb@...r.kernel.org
> ---
>  drivers/usb/host/xhci-mem.c |    2 +-
>  drivers/usb/host/xhci.c     |    6 ++----
>  2 files changed, 3 insertions(+), 5 deletions(-)

Acked-by: Mathias Nyman <mathias.nyman@...ux.intel.com>