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authorAl Viro <viro@zeniv.linux.org.uk>2017-05-25 00:54:09 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-05-27 22:39:32 +0300
commit5c7640ab625829fd08b7fa0160c6fd188e70b5fe (patch)
treeed589cc93bcbcd8ca56be2a68d1114239e86e1e5 /drivers/gpu/drm/drm_bufs.c
parent8c4fe499cabfec5a8fbbc2919ceaae31341f6921 (diff)
downloadlinux-5c7640ab625829fd08b7fa0160c6fd188e70b5fe.tar.xz
switch compat_drm_infobufs() to drm_ioctl_kernel()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers/gpu/drm/drm_bufs.c')
-rw-r--r--drivers/gpu/drm/drm_bufs.c48
1 files changed, 26 insertions, 22 deletions
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index adb1dd7fde5f..93e38d51cdc3 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -1258,11 +1258,11 @@ int drm_legacy_addbufs(struct drm_device *dev, void *data,
* lock, preventing of allocating more buffers after this call. Information
* about each requested buffer is then copied into user space.
*/
-int drm_legacy_infobufs(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
+int __drm_legacy_infobufs(struct drm_device *dev,
+ void *data, int *p,
+ int (*f)(void *, int, struct drm_buf_entry *))
{
struct drm_device_dma *dma = dev->dma;
- struct drm_buf_info *request = data;
int i;
int count;
@@ -1290,26 +1290,12 @@ int drm_legacy_infobufs(struct drm_device *dev, void *data,
DRM_DEBUG("count = %d\n", count);
- if (request->count >= count) {
+ if (*p >= count) {
for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
- if (dma->bufs[i].buf_count) {
- struct drm_buf_desc __user *to =
- &request->list[count];
- struct drm_buf_entry *from = &dma->bufs[i];
- if (copy_to_user(&to->count,
- &from->buf_count,
- sizeof(from->buf_count)) ||
- copy_to_user(&to->size,
- &from->buf_size,
- sizeof(from->buf_size)) ||
- copy_to_user(&to->low_mark,
- &from->low_mark,
- sizeof(from->low_mark)) ||
- copy_to_user(&to->high_mark,
- &from->high_mark,
- sizeof(from->high_mark)))
+ struct drm_buf_entry *from = &dma->bufs[i];
+ if (from->buf_count) {
+ if (f(data, count, from) < 0)
return -EFAULT;
-
DRM_DEBUG("%d %d %d %d %d\n",
i,
dma->bufs[i].buf_count,
@@ -1320,11 +1306,29 @@ int drm_legacy_infobufs(struct drm_device *dev, void *data,
}
}
}
- request->count = count;
+ *p = count;
return 0;
}
+static int copy_one_buf(void *data, int count, struct drm_buf_entry *from)
+{
+ struct drm_buf_info *request = data;
+ struct drm_buf_desc __user *to = &request->list[count];
+ struct drm_buf_desc v = {.count = from->buf_count,
+ .size = from->buf_size,
+ .low_mark = from->low_mark,
+ .high_mark = from->high_mark};
+ return copy_to_user(to, &v, offsetof(struct drm_buf_desc, flags));
+}
+
+int drm_legacy_infobufs(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct drm_buf_info *request = data;
+ return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf);
+}
+
/**
* Specifies a low and high water mark for buffer allocation
*