drm: fix radeon setparam on 32/64 bit systems.

The alignment on 64-bit is different for 64-bit values.

Signed-off-by: Dave Airlie <airlied@linux.ie>

diff --git a/drivers/char/drm/radeon_ioc32.c b/drivers/char/drm/radeon_ioc32.c
index 1f1f9cc055a437db9873005acb885eed2b7c9b87..04126c2e79ab71b5ef8513898466d2004a9d4a4c 100644 (file)
--- a/drivers/char/drm/radeon_ioc32.c
+++ b/drivers/char/drm/radeon_ioc32.c
@@ -349,6 +349,31 @@ static int compat_radeon_irq_emit(struct file *file, unsigned int cmd,
                         DRM_IOCTL_RADEON_IRQ_EMIT, (unsigned long)request);
 }
 
+typedef struct drm_radeon_setparam32 {
+       int param;
+       u64 value;
+} __attribute__((packed)) drm_radeon_setparam32_t;
+
+static int compat_radeon_cp_setparam(struct file *file, unsigned int cmd,
+                                    unsigned long arg)
+{
+       drm_radeon_setparam32_t req32;
+       drm_radeon_setparam_t __user *request;
+
+       if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
+               return -EFAULT;
+
+       request = compat_alloc_user_space(sizeof(*request));
+       if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
+           || __put_user(req32.param, &request->param)
+           || __put_user((void __user *)(unsigned long)req32.value,
+                         &request->value))
+               return -EFAULT;
+
+       return drm_ioctl(file->f_dentry->d_inode, file,
+                        DRM_IOCTL_RADEON_SETPARAM, (unsigned long) request);
+}
+
 drm_ioctl_compat_t *radeon_compat_ioctls[] = {
        [DRM_RADEON_CP_INIT] = compat_radeon_cp_init,
        [DRM_RADEON_CLEAR] = compat_radeon_cp_clear,
@@ -357,6 +382,7 @@ drm_ioctl_compat_t *radeon_compat_ioctls[] = {
        [DRM_RADEON_VERTEX2] = compat_radeon_cp_vertex2,
        [DRM_RADEON_CMDBUF] = compat_radeon_cp_cmdbuf,
        [DRM_RADEON_GETPARAM] = compat_radeon_cp_getparam,
+       [DRM_RADEON_SETPARAM] = compat_radeon_cp_setparam,
        [DRM_RADEON_ALLOC] = compat_radeon_mem_alloc,
        [DRM_RADEON_IRQ_EMIT] = compat_radeon_irq_emit,
 };