rivers may have similar issue if it assumes that the pages
allocated are completely zeroed.
This patch ensures that the pages returned are fully cleared.
Signed-off-by: Tim Chen
---
arch/x86/kernel/pci-dma.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/kernel/pci-dma.c b/arch/
On Sat, 2015-01-31 at 00:03 +0300, Sergei Shtylyov wrote:
> On 01/30/2015 10:54 PM, Tim Chen wrote:
> >
> > return NULL;
> > }
> > + /* round up to full page size */
> > + size = (((size-1) >> PAGE_SHIFT) + 1) * PAGE_SIZE;
>
>
On Fri, 2015-01-30 at 11:58 -0800, Greg KH wrote:
>
> Shouldn't this go to stable trees too?
>
Yes. Added the stable tag in updated patch that's resent.
> Also, why is the xhci driver not asking for the memory it is going to
> need? If it wants to use the full page, shouldn't it ask for it?
>
On Fri, 2015-01-30 at 14:07 -0800, Greg KH wrote:
> On Fri, Jan 30, 2015 at 02:01:58PM -0800, Tim Chen wrote:
> > On Fri, 2015-01-30 at 11:58 -0800, Greg KH wrote:
> >
> > >
> > > Shouldn't this go to stable trees too?
> > >
> >
> &g
On Mon, 2015-02-02 at 19:39 +0300, Sergei Shtylyov wrote:
>
> > Hi, is this an open-coded version of PAGE_ALIGN?
>
> Yes, it appears so. :-)
>
> WBR, Sergei
>
Thanks for the suggestion by Jiri. I updated the patch to use PAGE_ALIGN
below.
Regards,
Tim
--->8
On Wed, 2015-02-04 at 10:30 -0800, Tim Chen wrote:
> On Mon, 2015-02-02 at 19:39 +0300, Sergei Shtylyov wrote:
>
> >
> > > Hi, is this an open-coded version of PAGE_ALIGN?
> >
> > Yes, it appears so. :-)
> >
> > WBR, Sergei
> >
>
&g
On Wed, 2015-02-18 at 14:53 -0500, Alan Stern wrote:
> On Wed, 18 Feb 2015, Tim Chen wrote:
>
> > On Wed, 2015-02-04 at 10:30 -0800, Tim Chen wrote:
> > > On Mon, 2015-02-02 at 19:39 +0300, Sergei Shtylyov wrote:
> > >
> > > >
> > >
On Wed, 2015-02-18 at 15:45 -0500, Alan Stern wrote:
> On Wed, 18 Feb 2015, Tim Chen wrote:
>
> > > Have you tried doing the experiments I suggested in
> > >
> > > http://marc.info/?l=linux-usb&m=142272448620716&w=2
> > >
> > &g
ci the use the old behavior to avoid the hang. XHCI should
do a proper fix to avoid this un-allocated memory.
Signed-off-by: Tim Chen
Cc: # 3.16+
---
drivers/usb/host/xhci-mem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/
On Thu, 2015-02-19 at 17:05 +0200, Mathias Nyman wrote:
> On 19.02.2015 02:34, Tim Chen wrote:
> >
> > Commit d92ef66c4f8f ("x86: make dma_alloc_coherent() return zeroed memory
> > if CMA is enabled") changed the dma_alloc_coherent page clearance from
> > usin
On Thu, 2015-02-19 at 17:05 +0200, Mathias Nyman wrote:
> On 19.02.2015 02:34, Tim Chen wrote:
> >
> > Commit d92ef66c4f8f ("x86: make dma_alloc_coherent() return zeroed memory
> > if CMA is enabled") changed the dma_alloc_coherent page clearance from
> > usin
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