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Subject[PATCH] viafb: fix ioremap_nocache error handling
Date
viafb: fix ioremap_nocache error handling

Correct the returned error code for remapping the video framebuffer.
Introduce error handling for remapping MMIO register address space to
avoid a NULL pointer dereference. Disable hardware acceleration if
remapping MMIO register address space failed as those registers are only
used for hardware acceleration.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
---
viafbdev.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index 743eed4..72759b6 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -2134,12 +2134,16 @@ static int __devinit via_pci_probe(void)

if (!viaparinfo->fbmem_virt) {
printk(KERN_INFO "ioremap failed\n");
- return -1;
+ return -ENOMEM;
}

viafb_get_mmio_info(&viaparinfo->mmio_base, &viaparinfo->mmio_len);
viaparinfo->io_virt = ioremap_nocache(viaparinfo->mmio_base,
viaparinfo->mmio_len);
+ if (!viaparinfo->io_virt) {
+ printk(KERN_WARNING "ioremap failed: hardware acceleration disabled\n");
+ viafb_accel = 0;
+ }

viafbinfo->node = 0;
viafbinfo->fbops = &viafb_ops;
--
1.6.3.2


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