media: v4l2-ioctl: rename a temp var that stores _IOC_SIZE(cmd)
Instead of just calling it as "size", let's name it as "ioc_size",
as it reflects better its contents.
As this is constant along the function, also mark it as const.
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index a5dab16..f48c505 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -2833,15 +2833,15 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
size_t array_size = 0;
void __user *user_ptr = NULL;
void **kernel_ptr = NULL;
- size_t size = _IOC_SIZE(cmd);
+ const size_t ioc_size = _IOC_SIZE(cmd);
/* Copy arguments into temp kernel buffer */
if (_IOC_DIR(cmd) != _IOC_NONE) {
- if (size <= sizeof(sbuf)) {
+ if (ioc_size <= sizeof(sbuf)) {
parg = sbuf;
} else {
/* too big to allocate from stack */
- mbuf = kvmalloc(size, GFP_KERNEL);
+ mbuf = kvmalloc(ioc_size, GFP_KERNEL);
if (NULL == mbuf)
return -ENOMEM;
parg = mbuf;
@@ -2849,7 +2849,7 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
err = -EFAULT;
if (_IOC_DIR(cmd) & _IOC_WRITE) {
- unsigned int n = size;
+ unsigned int n = ioc_size;
/*
* In some cases, only a few fields are used as input,
@@ -2870,11 +2870,11 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
goto out;
/* zero out anything we don't copy from userspace */
- if (n < size)
- memset((u8 *)parg + n, 0, size - n);
+ if (n < ioc_size)
+ memset((u8 *)parg + n, 0, ioc_size - n);
} else {
/* read-only ioctl */
- memset(parg, 0, size);
+ memset(parg, 0, ioc_size);
}
}
@@ -2932,7 +2932,7 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
switch (_IOC_DIR(cmd)) {
case _IOC_READ:
case (_IOC_WRITE | _IOC_READ):
- if (copy_to_user((void __user *)arg, parg, size))
+ if (copy_to_user((void __user *)arg, parg, ioc_size))
err = -EFAULT;
break;
}