Commit a1e22653 authored by Daniel Vetter's avatar Daniel Vetter

drm/i915: Use kcalloc more

No buffer overflows here, but better safe than sorry.

v2:
- Fixup the sizeof conversion, I've missed the pointer deref (Jani).
- Drop the redundant GFP_ZERO, kcalloc alreads memsets (Jani).
- Use kmalloc_array for the execbuf fastpath to avoid the memset
  (Chris). I've opted to leave all other conversions as-is since they
  aren't in a fastpath and dealing with cleared memory instead of
  random garbage is just generally nicer.

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
[danvet: Drop the contentious kmalloc_array hunk in execbuf.]
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent b14c5679
......@@ -1047,7 +1047,8 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
return -EINVAL;
}
cliprects = kmalloc(args->num_cliprects * sizeof(*cliprects),
cliprects = kcalloc(args->num_cliprects,
sizeof(*cliprects),
GFP_KERNEL);
if (cliprects == NULL) {
ret = -ENOMEM;
......
......@@ -336,7 +336,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
ppgtt->base.insert_entries = gen6_ppgtt_insert_entries;
ppgtt->base.cleanup = gen6_ppgtt_cleanup;
ppgtt->base.scratch = dev_priv->gtt.base.scratch;
ppgtt->pt_pages = kzalloc(sizeof(struct page *)*ppgtt->num_pd_entries,
ppgtt->pt_pages = kcalloc(ppgtt->num_pd_entries, sizeof(struct page *),
GFP_KERNEL);
if (!ppgtt->pt_pages)
return -ENOMEM;
......@@ -347,7 +347,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
goto err_pt_alloc;
}
ppgtt->pt_dma_addr = kzalloc(sizeof(dma_addr_t) *ppgtt->num_pd_entries,
ppgtt->pt_dma_addr = kcalloc(ppgtt->num_pd_entries, sizeof(dma_addr_t),
GFP_KERNEL);
if (!ppgtt->pt_dma_addr)
goto err_pt_alloc;
......
......@@ -393,7 +393,7 @@ i915_gem_set_tiling(struct drm_device *dev, void *data,
/* Try to preallocate memory required to save swizzling on put-pages */
if (i915_gem_object_needs_bit17_swizzle(obj)) {
if (obj->bit_17 == NULL) {
obj->bit_17 = kmalloc(BITS_TO_LONGS(obj->base.size >> PAGE_SHIFT) *
obj->bit_17 = kcalloc(BITS_TO_LONGS(obj->base.size >> PAGE_SHIFT),
sizeof(long), GFP_KERNEL);
}
} else {
......@@ -504,7 +504,7 @@ i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj)
int i;
if (obj->bit_17 == NULL) {
obj->bit_17 = kmalloc(BITS_TO_LONGS(page_count) *
obj->bit_17 = kcalloc(BITS_TO_LONGS(page_count),
sizeof(long), GFP_KERNEL);
if (obj->bit_17 == NULL) {
DRM_ERROR("Failed to allocate memory for bit 17 "
......
......@@ -793,7 +793,7 @@ static void i915_gem_record_rings(struct drm_device *dev,
error->ring[i].num_requests = count;
error->ring[i].requests =
kmalloc(count*sizeof(struct drm_i915_error_request),
kcalloc(count, sizeof(*error->ring[i].requests),
GFP_ATOMIC);
if (error->ring[i].requests == NULL) {
error->ring[i].num_requests = 0;
......@@ -835,7 +835,7 @@ static void i915_gem_capture_vm(struct drm_i915_private *dev_priv,
error->pinned_bo_count[ndx] = i - error->active_bo_count[ndx];
if (i) {
active_bo = kmalloc(sizeof(*active_bo)*i, GFP_ATOMIC);
active_bo = kcalloc(i, sizeof(*active_bo), GFP_ATOMIC);
if (active_bo)
pinned_bo = active_bo + error->active_bo_count[ndx];
}
......
......@@ -9052,7 +9052,7 @@ static int __intel_set_mode(struct drm_crtc *crtc,
unsigned disable_pipes, prepare_pipes, modeset_pipes;
int ret = 0;
saved_mode = kmalloc(2 * sizeof(*saved_mode), GFP_KERNEL);
saved_mode = kcalloc(2, sizeof(*saved_mode), GFP_KERNEL);
if (!saved_mode)
return -ENOMEM;
saved_hwmode = saved_mode + 1;
......
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