From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Felipe Balbi <balbi@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Vladimir Zapolskiy <vz@mleia.com>,
James Grant <james.grant@jci.com>,
Sylvain Lemieux <slemieux.tyco@gmail.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] usb: gadget: udc: lpc32xx: allocate descriptor with GFP_ATOMIC
Date: Tue, 18 Jun 2019 09:46:33 +0200 [thread overview]
Message-ID: <20190618074633.GC23549@piout.net> (raw)
In-Reply-To: <87zhmffiui.fsf@linux.intel.com>
Hi,
On 18/06/2019 10:33:41+0300, Felipe Balbi wrote:
> Alexandre Belloni <alexandre.belloni@bootlin.com> writes:
>
> > Gadget drivers may queue request in interrupt context. This would lead to
> > a descriptor allocation in that context. In that case we would hit
> > BUG_ON(in_interrupt()) in __get_vm_area_node.
> >
> > Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
> > ---
> > drivers/usb/gadget/udc/lpc32xx_udc.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c
> > index d8f1c60793ed..b706d9c85a35 100644
> > --- a/drivers/usb/gadget/udc/lpc32xx_udc.c
> > +++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
> > @@ -938,7 +938,7 @@ static struct lpc32xx_usbd_dd_gad *udc_dd_alloc(struct lpc32xx_udc *udc)
> > struct lpc32xx_usbd_dd_gad *dd;
> >
> > dd = (struct lpc32xx_usbd_dd_gad *) dma_pool_alloc(
> > - udc->dd_cache, (GFP_KERNEL | GFP_DMA), &dma);
> > + udc->dd_cache, (GFP_ATOMIC | GFP_DMA), &dma);
>
> doesn't apply:
>
> checking file drivers/usb/gadget/udc/lpc32xx_udc.c
> Hunk #1 FAILED at 938.
>
You already applied it for v5.2-rc5
--
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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next prev parent reply other threads:[~2019-06-18 7:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-10 12:42 [PATCH] usb: gadget: udc: lpc32xx: allocate descriptor with GFP_ATOMIC Alexandre Belloni
2019-05-10 15:59 ` Joe Perches
2019-05-13 11:33 ` James Grant
2019-06-18 7:33 ` Felipe Balbi
2019-06-18 7:46 ` Alexandre Belloni [this message]
2019-06-18 8:45 ` Felipe Balbi
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