V4L/DVB (4632): Zoran: Implement pcipci failure check

We should be doing this on all devices doing PCI<->PCI DMA. We only set
the _FAIL ones when the DMA will fail or may cause crashes. This relies
on the PCIAGP_FAIL patch I sent to Andrew already

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/media/video/zoran_driver.c b/drivers/media/video/zoran_driver.c
index 5f90db27892b..862a984c2155 100644
--- a/drivers/media/video/zoran_driver.c
+++ b/drivers/media/video/zoran_driver.c
@@ -1512,6 +1512,13 @@ setup_fbuffer (struct file               *file,
         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
                 return -EPERM;
 
+        /* Don't allow frame buffer overlay if PCI or AGP is buggy, or on
+           ALi Magik (that needs very low latency while the card needs a
+           higher value always) */
+
+        if (pci_pci_problems & (PCIPCI_FAIL | PCIAGP_FAIL | PCIPCI_ALIMAGIK))
+                return -ENXIO;
+
         /* we need a bytesperline value, even if not given */
         if (!bytesperline)
                 bytesperline = width * ((fmt->depth + 7) & ~7) / 8;