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| author | Alan <gnomes@lxorguk.ukuu.org.uk> | 2016-02-17 17:20:46 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-02-17 19:00:38 +0300 |
| commit | 69603dbb315fc7a2b855990ee308b97dc23bf6eb (patch) | |
| tree | 4cf8a1d1130924f4f901a39ecbdb0b36f31f9a2a /drivers/gpu/drm/i915/i915_gem_gtt.h | |
| parent | ecb2448218acf23c401434c26be256147833b221 (diff) | |
| download | linux-69603dbb315fc7a2b855990ee308b97dc23bf6eb.tar.xz | |
i915: cast before shifting in i915_pte_count
Otherwise a pde_shift big enough to overflow a u32 will be truncated before
assignment
Note: We never asked for ranges spanning a 4G boundary, so this issue
doesn't cause a real problem.
Signed-off-by: Alan Cox <alan@linux.intel.com>
[danvet: Add note why this isn't a real problem.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160217142043.4947.60447.stgit@localhost.localdomain
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h index 66a6da2396a2..368d111aa9c5 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.h +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h @@ -418,7 +418,7 @@ static inline uint32_t i915_pte_index(uint64_t address, uint32_t pde_shift) static inline uint32_t i915_pte_count(uint64_t addr, size_t length, uint32_t pde_shift) { - const uint64_t mask = ~((1 << pde_shift) - 1); + const uint64_t mask = ~((1ULL << pde_shift) - 1); uint64_t end; WARN_ON(length == 0); |