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switch compat_drm_version() to drm_ioctl_kernel()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-05-24 14:11:03 -04:00
parent ff22ff9e73
commit 012c6741c6
3 changed files with 18 additions and 27 deletions
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1
drivers/gpu/drm/drm_internal.h
View File

@ -143,3 +143,4 @@ static inline int drm_debugfs_crtc_crc_add(struct drm_crtc *crtc)
return 0;
}
#endif
drm_ioctl_t drm_version;

42
drivers/gpu/drm/drm_ioc32.c
View File

@ -33,6 +33,7 @@
#include <drm/drmP.h>
#include "drm_legacy.h"
#include "drm_internal.h"
#define DRM_IOCTL_VERSION32 DRM_IOWR(0x00, drm_version32_t)
#define DRM_IOCTL_GET_UNIQUE32 DRM_IOWR(0x01, drm_unique32_t)
@ -88,39 +89,28 @@ static int compat_drm_version(struct file *file, unsigned int cmd,
unsigned long arg)
{
drm_version32_t v32;
struct drm_version __user *version;
struct drm_version v;
int err;
if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
return -EFAULT;
version = compat_alloc_user_space(sizeof(*version));
if (!version)
return -EFAULT;
if (__put_user(v32.name_len, &version->name_len)
|| __put_user((void __user *)(unsigned long)v32.name,
&version->name)
|| __put_user(v32.date_len, &version->date_len)
|| __put_user((void __user *)(unsigned long)v32.date,
&version->date)
|| __put_user(v32.desc_len, &version->desc_len)
|| __put_user((void __user *)(unsigned long)v32.desc,
&version->desc))
return -EFAULT;
err = drm_ioctl(file,
DRM_IOCTL_VERSION, (unsigned long)version);
v = (struct drm_version) {
.name_len = v32.name_len,
.name = compat_ptr(v32.name),
.date_len = v32.date_len,
.date = compat_ptr(v32.date),
.desc_len = v32.desc_len,
.desc = compat_ptr(v32.desc),
};
err = drm_ioctl_kernel(file, drm_version, &v,
DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW);
if (err)
return err;
if (__get_user(v32.version_major, &version->version_major)
|| __get_user(v32.version_minor, &version->version_minor)
|| __get_user(v32.version_patchlevel, &version->version_patchlevel)
|| __get_user(v32.name_len, &version->name_len)
|| __get_user(v32.date_len, &version->date_len)
|| __get_user(v32.desc_len, &version->desc_len))
return -EFAULT;
v32.version_major = v.version_major;
v32.version_minor = v.version_minor;
v32.version_patchlevel = v.version_patchlevel;
if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
return -EFAULT;
return 0;
@ -1081,7 +1071,7 @@ static struct {
char *name;
} drm_compat_ioctls[] = {
#define DRM_IOCTL32_DEF(n, f) [DRM_IOCTL_NR(n##32)] = {.fn = f, .name = #n}
[DRM_IOCTL_NR(DRM_IOCTL_VERSION32)].fn = compat_drm_version,
DRM_IOCTL32_DEF(DRM_IOCTL_VERSION, compat_drm_version),
[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)].fn = compat_drm_getunique,
[DRM_IOCTL_NR(DRM_IOCTL_GET_MAP32)].fn = compat_drm_getmap,
[DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT32)].fn = compat_drm_getclient,

2
drivers/gpu/drm/drm_ioctl.c
View File

@ -461,7 +461,7 @@ static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
*
* Fills in the version information in \p arg.
*/
static int drm_version(struct drm_device *dev, void *data,
int drm_version(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_version *version = data;