[PATCH 1/4] drm/radeon: Stop directly referencing iomem

[Mikel Rychliski]

pci_platform_rom returns an __iomem pointer which should not be accessed
directly. Change radeon_read_platform_bios to use memcpy_fromio instead of
calling kmemdup on the __iomem pointer.

Signed-off-by: Mikel Rychliski <mikel at mikelr.com>
---
 drivers/gpu/drm/radeon/radeon_bios.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c
index c42f73fad3e3..c3ae4c92a115 100644
--- a/drivers/gpu/drm/radeon/radeon_bios.c
+++ b/drivers/gpu/drm/radeon/radeon_bios.c
@@ -118,11 +118,14 @@ static bool radeon_read_platform_bios(struct radeon_device *rdev)
 		return false;
 	}
 
-	if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {
+	rdev->bios = kzalloc(size, GFP_KERNEL);
+	if (!rdev->bios)
 		return false;
-	}
-	rdev->bios = kmemdup(bios, size, GFP_KERNEL);
-	if (rdev->bios == NULL) {
+
+	memcpy_fromio(rdev->bios, bios, size);
+
+	if (size == 0 || rdev->bios[0] != 0x55 || rdev->bios[1] != 0xaa) {
+		kfree(rdev->bios);
 		return false;
 	}
 
-- 
2.13.7