[PATCH] ssb: Fix coherent DMA mask for PCI devices

[PATCH] ssb: Fix coherent DMA mask for PCI devices

[Michael Buesch]

This fixes setting the coherent DMA mask for PCI devices.

Signed-off-by: Michael Buesch <mb@bu3sch.de>

---

John, please queue this bugfix for 2.6.26

The whole SSB DMA API should be rewritten, as it makes too many bad
assumptions about the other subsytems. I will do that soon.
But let's apply this patch for now, as it fixes this particular bug.


Index: wireless-testing/drivers/ssb/main.c
===================================================================
--- wireless-testing.orig/drivers/ssb/main.c	2008-05-17 18:44:32.000000000 +0200
+++ wireless-testing/drivers/ssb/main.c	2008-06-12 15:24:04.000000000 +0200
@@ -1165,21 +1165,27 @@ u32 ssb_dma_translation(struct ssb_devic
 }
 EXPORT_SYMBOL(ssb_dma_translation);
 
 int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask)
 {
 	struct device *dma_dev = ssb_dev->dma_dev;
+	int err = 0;
 
 #ifdef CONFIG_SSB_PCIHOST
-	if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI)
-		return dma_set_mask(dma_dev, mask);
+	if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI) {
+		err = pci_set_dma_mask(ssb_dev->bus->host_pci, mask);
+		if (err)
+			return err;
+		err = pci_set_consistent_dma_mask(ssb_dev->bus->host_pci, mask);
+		return err;
+	}
 #endif
 	dma_dev->coherent_dma_mask = mask;
 	dma_dev->dma_mask = &dma_dev->coherent_dma_mask;
 
-	return 0;
+	return err;
 }
 EXPORT_SYMBOL(ssb_dma_set_mask);
 
 int ssb_bus_may_powerdown(struct ssb_bus *bus)
 {
 	struct ssb_chipcommon *cc;

Re: [PATCH] ssb: Fix coherent DMA mask for PCI devices

[Pekka Enberg]

On Thu, Jun 12, 2008 at 4:33 PM, Michael Buesch <mb-fseUSCV1ubazQB+pC5nmwQ@public.gmane.org> wrote:
> This fixes setting the coherent DMA mask for PCI devices.
>
> Signed-off-by: Michael Buesch <mb-fseUSCV1ubazQB+pC5nmwQ@public.gmane.org>
>
> ---
>
> John, please queue this bugfix for 2.6.26
>
> The whole SSB DMA API should be rewritten, as it makes too many bad
> assumptions about the other subsytems. I will do that soon.
> But let's apply this patch for now, as it fixes this particular bug.

Hmm. Does the patch have anything to do with this bug report?

http://bugzilla.kernel.org/show_bug.cgi?id=10819
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Re: [PATCH] ssb: Fix coherent DMA mask for PCI devices

[Michael Buesch]

On Thursday 12 June 2008 23:44:13 Pekka Enberg wrote:
> On Thu, Jun 12, 2008 at 4:33 PM, Michael Buesch <mb-fseUSCV1ubazQB+pC5nmwQ@public.gmane.org> wrote:
> > This fixes setting the coherent DMA mask for PCI devices.
> >
> > Signed-off-by: Michael Buesch <mb-fseUSCV1ubazQB+pC5nmwQ@public.gmane.org>
> >
> > ---
> >
> > John, please queue this bugfix for 2.6.26
> >
> > The whole SSB DMA API should be rewritten, as it makes too many bad
> > assumptions about the other subsytems. I will do that soon.
> > But let's apply this patch for now, as it fixes this particular bug.
> 
> Hmm. Does the patch have anything to do with this bug report?
> 
> http://bugzilla.kernel.org/show_bug.cgi?id=10819
> 
> 

Sorry. Magic crystal ball is broken. :)
Can you please try?

-- 
Greetings Michael.
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