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drm/nouveau/bios: return actual size of the buffer retrieved via _ROM
author
Ben Skeggs
<bskeggs@redhat.com>
Thu, 19 Nov 2015 03:18:34 +0000
(13:18 +1000)
committer
Ben Skeggs
<bskeggs@redhat.com>
Wed, 25 Nov 2015 05:31:21 +0000
(15:31 +1000)
Fixes detection of a failed attempt at fetching the entire ROM image
in one-shot (a violation of the spec, that works a lot of the time).
Tested on a HP Zbook 15 G2.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
drivers/gpu/drm/nouveau/nouveau_acpi.c
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diff --git
a/drivers/gpu/drm/nouveau/nouveau_acpi.c
b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index
8b8332e
..
d5e6938
100644
(file)
--- a/
drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/
drivers/gpu/drm/nouveau/nouveau_acpi.c
@@
-367,6
+367,7
@@
static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
return -ENODEV;
}
obj = (union acpi_object *)buffer.pointer;
+ len = min(len, (int)obj->buffer.length);
memcpy(bios+offset, obj->buffer.pointer, len);
kfree(buffer.pointer);
return len;