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Date: Wed, 02 Jul 2008 16:50:06 +0100
From: Andy Burns <linux-dvb@adslpipe.co.uk>
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Subject: Re: [linux-dvb] [PATCH] Shrink saa7134 mmio mapped size
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The saa7134 driver attempts to map a fixed 4K starting from the base 
address of its mmio area, regardless of the actual size of the area.
Any excessive mapping may extend past the end of a page, which goes 
un-noticed on bare-metal, but is detected and denied when the card is 
used with pci passthrough to a xen domU. If shared IRQ is used the 
"pollirq" kernel option may be required in dom0.

Signed-off-by: Andy Burns <andy@burns.net>
---- drivers/media/video/saa7134/saa7134-core.c.orig     2008-07-01 
16:46:49.000000000 +0100
+++ drivers/media/video/saa7134/saa7134-core.c  2008-07-02 
16:41:37.000000000 +0100
@@ -908,7 +908,8 @@
                        dev->name,(unsigned long 
long)pci_resource_start(pci_dev,0));
                 goto fail1;
         }
-       dev->lmmio = ioremap(pci_resource_start(pci_dev,0), 0x1000);
+       dev->lmmio = ioremap(pci_resource_start(pci_dev,0),
+                             pci_resource_len(pci_dev,0));
         dev->bmmio = (__u8 __iomem *)dev->lmmio;
         if (NULL == dev->lmmio) {
                 err = -EIO;


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