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DRM: Replace kmalloc/memset combos with kzalloc
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Currently most, if not all, memory allocation in drm_bufs.c is followed by initializing the memory with 0.

Replace the use of kmalloc+memset with kzalloc.

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Davidlohr Bueso authored and Dave Airlie committed Aug 11, 2010
1 parent 7203425 commit 94e3370
Showing 1 changed file with 11 additions and 22 deletions.
33 changes: 11 additions & 22 deletions drivers/gpu/drm/drm_bufs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -328,14 +328,13 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
return -EINVAL;
}

list = kmalloc(sizeof(*list), GFP_KERNEL);
list = kzalloc(sizeof(*list), GFP_KERNEL);
if (!list) {
if (map->type == _DRM_REGISTERS)
iounmap(map->handle);
kfree(map);
return -EINVAL;
}
memset(list, 0, sizeof(*list));
list->map = map;

mutex_lock(&dev->struct_mutex);
Expand Down Expand Up @@ -678,13 +677,12 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
return -EINVAL;
}

entry->buflist = kmalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
if (!entry->buflist) {
mutex_unlock(&dev->struct_mutex);
atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
memset(entry->buflist, 0, count * sizeof(*entry->buflist));

entry->buf_size = size;
entry->page_order = page_order;
Expand All @@ -708,7 +706,7 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
buf->file_priv = NULL;

buf->dev_priv_size = dev->driver->dev_priv_size;
buf->dev_private = kmalloc(buf->dev_priv_size, GFP_KERNEL);
buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
if (!buf->dev_private) {
/* Set count correctly so we free the proper amount. */
entry->buf_count = count;
Expand All @@ -717,7 +715,6 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
memset(buf->dev_private, 0, buf->dev_priv_size);

DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);

Expand Down Expand Up @@ -832,22 +829,20 @@ int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
return -EINVAL;
}

entry->buflist = kmalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
if (!entry->buflist) {
mutex_unlock(&dev->struct_mutex);
atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
memset(entry->buflist, 0, count * sizeof(*entry->buflist));

entry->seglist = kmalloc(count * sizeof(*entry->seglist), GFP_KERNEL);
entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL);
if (!entry->seglist) {
kfree(entry->buflist);
mutex_unlock(&dev->struct_mutex);
atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
memset(entry->seglist, 0, count * sizeof(*entry->seglist));

/* Keep the original pagelist until we know all the allocations
* have succeeded
Expand Down Expand Up @@ -911,8 +906,8 @@ int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
buf->file_priv = NULL;

buf->dev_priv_size = dev->driver->dev_priv_size;
buf->dev_private = kmalloc(buf->dev_priv_size,
GFP_KERNEL);
buf->dev_private = kzalloc(buf->dev_priv_size,
GFP_KERNEL);
if (!buf->dev_private) {
/* Set count correctly so we free the proper amount. */
entry->buf_count = count;
Expand All @@ -923,7 +918,6 @@ int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
memset(buf->dev_private, 0, buf->dev_priv_size);

DRM_DEBUG("buffer %d @ %p\n",
entry->buf_count, buf->address);
Expand Down Expand Up @@ -1048,14 +1042,13 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
return -EINVAL;
}

entry->buflist = kmalloc(count * sizeof(*entry->buflist),
entry->buflist = kzalloc(count * sizeof(*entry->buflist),
GFP_KERNEL);
if (!entry->buflist) {
mutex_unlock(&dev->struct_mutex);
atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
memset(entry->buflist, 0, count * sizeof(*entry->buflist));

entry->buf_size = size;
entry->page_order = page_order;
Expand All @@ -1080,7 +1073,7 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
buf->file_priv = NULL;

buf->dev_priv_size = dev->driver->dev_priv_size;
buf->dev_private = kmalloc(buf->dev_priv_size, GFP_KERNEL);
buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
if (!buf->dev_private) {
/* Set count correctly so we free the proper amount. */
entry->buf_count = count;
Expand All @@ -1090,8 +1083,6 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
return -ENOMEM;
}

memset(buf->dev_private, 0, buf->dev_priv_size);

DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);

offset += alignment;
Expand Down Expand Up @@ -1209,14 +1200,13 @@ static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request
return -EINVAL;
}

entry->buflist = kmalloc(count * sizeof(*entry->buflist),
entry->buflist = kzalloc(count * sizeof(*entry->buflist),
GFP_KERNEL);
if (!entry->buflist) {
mutex_unlock(&dev->struct_mutex);
atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
memset(entry->buflist, 0, count * sizeof(*entry->buflist));

entry->buf_size = size;
entry->page_order = page_order;
Expand All @@ -1240,7 +1230,7 @@ static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request
buf->file_priv = NULL;

buf->dev_priv_size = dev->driver->dev_priv_size;
buf->dev_private = kmalloc(buf->dev_priv_size, GFP_KERNEL);
buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
if (!buf->dev_private) {
/* Set count correctly so we free the proper amount. */
entry->buf_count = count;
Expand All @@ -1249,7 +1239,6 @@ static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request
atomic_dec(&dev->buf_alloc);
return -ENOMEM;
}
memset(buf->dev_private, 0, buf->dev_priv_size);

DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);

Expand Down

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