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authorGustavo A. R. Silva <gustavo@embeddedor.com>2019-06-21 15:13:14 +0200
committerBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>2019-06-21 15:13:14 +0200
commitb27b0017efa28217d234c23acbceadb1a71cf53a (patch)
tree40b6afc20c58d898172f9d8381401b417836de5e /drivers/video
parentacf7287e77852cf787c45980c27bfbdca7d94b0d (diff)
downloadlinux-b27b0017efa28217d234c23acbceadb1a71cf53a.tar.bz2
video: fbdev-MMP: Use struct_size() in devm_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; struct boo entry[]; }; size = sizeof(struct foo) + count * sizeof(struct boo); instance = devm_kzalloc(dev, size, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = devm_kzalloc(dev, struct_size(instance, entry, count), GFP_KERNEL); Notice that, in this case, variable size is not necessary, hence it is removed. This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/fbdev/mmp/hw/mmp_ctrl.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/video/fbdev/mmp/hw/mmp_ctrl.c b/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
index 87d943f15a12..17174cd7a5bb 100644
--- a/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
+++ b/drivers/video/fbdev/mmp/hw/mmp_ctrl.c
@@ -433,7 +433,7 @@ static int mmphw_probe(struct platform_device *pdev)
{
struct mmp_mach_plat_info *mi;
struct resource *res;
- int ret, i, size, irq;
+ int ret, i, irq;
struct mmphw_path_plat *path_plat;
struct mmphw_ctrl *ctrl = NULL;
@@ -461,9 +461,9 @@ static int mmphw_probe(struct platform_device *pdev)
}
/* allocate */
- size = sizeof(struct mmphw_ctrl) + sizeof(struct mmphw_path_plat) *
- mi->path_num;
- ctrl = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+ ctrl = devm_kzalloc(&pdev->dev,
+ struct_size(ctrl, path_plats, mi->path_num),
+ GFP_KERNEL);
if (!ctrl) {
ret = -ENOMEM;
goto failed;