Commit 3b2c6932 authored Jan 24, 2017 by Arvind Yadav Committed by Alex Deucher Jan 27, 2017

drm: radeon: radeon_ttm: Handle return NULL error from ioremap_nocache



Here, If ioremap_nocache will fail. It will return NULL.
Kernel can run into a NULL-pointer dereference.
This error check will avoid NULL pointer dereference.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 8ba28ac9

drivers/gpu/drm/radeon/radeon_ttm.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -502,6 +502,8 @@ static int radeon_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_
		mem->bus.addr =
		ioremap_nocache(mem->bus.base + mem->bus.offset,
		mem->bus.size);
		if (!mem->bus.addr)
		return -ENOMEM;

		/*
		* Alpha: Use just the bus offset plus

Admin message