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authorGustavo A. R. Silva <gustavo@embeddedor.com>2019-01-08 10:21:52 -0600
committerGerd Hoffmann <kraxel@redhat.com>2019-01-09 09:38:49 +0100
commitd4b9dd50076e02b46292be379ce976e9ad75dc40 (patch)
tree2a02d330a4426ee57ab46c596f86614c20b6e46e /drivers/gpu/drm/qxl
parentd516e75c71c9853ef70a9c476d11a97b69380147 (diff)
qxl: Use struct_size() in kzalloc()
One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; void *entry[]; }; instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL); This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Link: http://patchwork.freedesktop.org/patch/msgid/20190108162152.GA25361@embeddedor Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/qxl')
-rw-r--r--drivers/gpu/drm/qxl/qxl_display.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index 72a1784dae54..1f8fddcc34d6 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -48,8 +48,8 @@ static int qxl_alloc_client_monitors_config(struct qxl_device *qdev,
}
if (!qdev->client_monitors_config) {
qdev->client_monitors_config = kzalloc(
- sizeof(struct qxl_monitors_config) +
- sizeof(struct qxl_head) * count, GFP_KERNEL);
+ struct_size(qdev->client_monitors_config,
+ heads, count), GFP_KERNEL);
if (!qdev->client_monitors_config)
return -ENOMEM;
}