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authorYongji Xie <xyjxie@linux.vnet.ibm.com>2016-09-13 13:53:46 +0800
committerTomi Valkeinen <tomi.valkeinen@ti.com>2016-09-27 10:55:02 +0300
commit5bda8f7b54687ab6397a383db38d53fd51bb1c6e (patch)
tree37c6fa829400ee4730adce898f670f87da5e5b0a /drivers/video
parent220be8d0e1729fc6f4bb10b009393cd0c1f5574e (diff)
video: fbdev: offb: Call pci_enable_device() before using the PCI VGA device
Currently the offb module will use the PCI VGA device as frame buffer device without calling something like pci_enable_device(). However, this would cause some problem if we disable memory decoding of the upstream bridge before. When the console driver issued memory access to the VGA device, the access cannot be supported by the bridge which will cause EEH error on Power machine. Signed-off-by: Yongji Xie <xyjxie@linux.vnet.ibm.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/fbdev/offb.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/video/fbdev/offb.c b/drivers/video/fbdev/offb.c
index fb60a8f0cc94..906c6e75c260 100644
--- a/drivers/video/fbdev/offb.c
+++ b/drivers/video/fbdev/offb.c
@@ -625,6 +625,21 @@ static void __init offb_init_nodriver(struct device_node *dp, int no_real_node)
if (address == OF_BAD_ADDR && addr_prop)
address = (u64)addr_prop;
if (address != OF_BAD_ADDR) {
+#ifdef CONFIG_PCI
+ const __be32 *vidp, *didp;
+ u32 vid, did;
+ struct pci_dev *pdev;
+
+ vidp = of_get_property(dp, "vendor-id", NULL);
+ didp = of_get_property(dp, "device-id", NULL);
+ if (vidp && didp) {
+ vid = be32_to_cpup(vidp);
+ did = be32_to_cpup(didp);
+ pdev = pci_get_device(vid, did, NULL);
+ if (!pdev || pci_enable_device(pdev))
+ return;
+ }
+#endif
/* kludge for valkyrie */
if (strcmp(dp->name, "valkyrie") == 0)
address += 0x1000;