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Date: Thu, 8 May 2014 09:21:51 -0700 From: Dan Williams <dan.j.williams@...el.com> To: Mathias Nyman <mathias.nyman@...ux.intel.com> Cc: Greg KH <gregkh@...uxfoundation.org>, USB list <linux-usb@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Sarah Sharp <sarah.a.sharp@...ux.intel.com>, Alan Stern <stern@...land.harvard.edu> Subject: Re: [PATCH 03/10] usb: catch attempts to submit urbs with a vmalloc'd transfer buffer On Thu, May 8, 2014 at 9:25 AM, Mathias Nyman <mathias.nyman@...ux.intel.com> wrote: > From: Dan Williams <dan.j.williams@...el.com> > > Save someone else the debug cycles of figuring out why a driver's > transfer request is failing or causing undefined system behavior. > Buffers submitted for dma must come from GFP allocated / DMA-able > memory. > > Return -EAGAIN matching the return value for dma_mapping_error() cases. > > Cc: Alan Stern <stern@...land.harvard.edu> > Cc: Sarah Sharp <sarah.a.sharp@...ux.intel.com> > Cc: Mathias Nyman <mathias.nyman@...ux.intel.com> > Signed-off-by: Dan Williams <dan.j.williams@...el.com> > Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com> Thanks Mathias. One note, this was acked-by Alan here: http://marc.info/?l=linux-usb&m=139327920501989&w=2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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