[PATCH intel-gpu-tools] intel_bios_dumper: handle rom_size == 0

[Forest Bond]

Some versions of libpciaccess on Linux set rom_size to 0 for VGA
devices.  While this behavior may change, intel_bios_dumper should
handle this situation to be compatible with current versions of the
library.

This fixes segmentation faults on affected systems.

Signed-off-by: Forest Bond <forest.bond at rapidrollout.com>
---
 tools/intel_bios_dumper.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/tools/intel_bios_dumper.c b/tools/intel_bios_dumper.c
index 53293eb..0fa1833 100644
--- a/tools/intel_bios_dumper.c
+++ b/tools/intel_bios_dumper.c
@@ -77,6 +77,11 @@ int main(int argc, char **argv)
 	if (dev->vendor_id != 0x8086)
 		errx(1, "Graphics card is non-intel");
 
+	/* Some versions of libpciaccess correct this automatically, but some
+	 * don't. */
+	if (dev->rom_size == 0)
+		dev->rom_size = 64 * 1024;
+
 	bios = malloc(dev->rom_size);
 	if (bios == NULL)
 		errx(1, "Couldn't allocate memory for BIOS data\n");
-- 
1.7.0.4
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