From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 25 May 2017 13:33:11 -0400
Subject: switch compat_drm_wait_vblank() to drm_ioctl_kernel()
Git-commit: d5288c88c67c388091fa0281640b586b4941e3d5
Patch-mainline: v4.13-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/drm_ioc32.c | 26 ++++++++++----------------
1 file changed, 10 insertions(+), 16 deletions(-)
--- a/drivers/gpu/drm/drm_ioc32.c
+++ b/drivers/gpu/drm/drm_ioc32.c
@@ -837,29 +837,23 @@ static int compat_drm_wait_vblank(struct
{
drm_wait_vblank32_t __user *argp = (void __user *)arg;
drm_wait_vblank32_t req32;
- union drm_wait_vblank __user *request;
+ union drm_wait_vblank req;
int err;
if (copy_from_user(&req32, argp, sizeof(req32)))
return -EFAULT;
- request = compat_alloc_user_space(sizeof(*request));
- if (!request
- || __put_user(req32.request.type, &request->request.type)
- || __put_user(req32.request.sequence, &request->request.sequence)
- || __put_user(req32.request.signal, &request->request.signal))
- return -EFAULT;
-
- err = drm_ioctl(file, DRM_IOCTL_WAIT_VBLANK, (unsigned long)request);
+ req.request.type = req32.request.type;
+ req.request.sequence = req32.request.sequence;
+ req.request.signal = req32.request.signal;
+ err = drm_ioctl_kernel(file, drm_wait_vblank, &req, DRM_UNLOCKED);
if (err)
return err;
- if (__get_user(req32.reply.type, &request->reply.type)
- || __get_user(req32.reply.sequence, &request->reply.sequence)
- || __get_user(req32.reply.tval_sec, &request->reply.tval_sec)
- || __get_user(req32.reply.tval_usec, &request->reply.tval_usec))
- return -EFAULT;
-
+ req32.reply.type = req.reply.type;
+ req32.reply.sequence = req.reply.sequence;
+ req32.reply.tval_sec = req.reply.tval_sec;
+ req32.reply.tval_usec = req.reply.tval_usec;
if (copy_to_user(argp, &req32, sizeof(req32)))
return -EFAULT;
@@ -960,7 +954,7 @@ static struct {
#if defined(CONFIG_X86) || defined(CONFIG_IA64)
DRM_IOCTL32_DEF(DRM_IOCTL_UPDATE_DRAW, compat_drm_update_draw),
#endif
- [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)].fn = compat_drm_wait_vblank,
+ DRM_IOCTL32_DEF(DRM_IOCTL_WAIT_VBLANK, compat_drm_wait_vblank),
#if defined(CONFIG_X86) || defined(CONFIG_IA64)
[DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)].fn = compat_drm_mode_addfb2,
#endif