[RESEND] drm/i915/gem: Use user_write_access_begin() instead of user_access_begin()

Commit Message

Christophe Leroy May 1, 2021, 8:15 a.m. UTC

eb_copy_relocations() only do unsafe_put_user(), it only
requires write access to user.

Use user_write_access_begin() instead of user_access_begin().

Signed-off-by: Christophe Leroy <[e-mail]>
---
Resending with mm list in addition

 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Patch

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 5964e67c7d36..f7a7bb45274b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1907,14 +1907,14 @@  static int eb_copy_relocations(const struct i915_execbuffer *eb)
 		 * happened we would make the mistake of assuming that the
 		 * relocations were valid.
 		 */
-		if (!user_access_begin(urelocs, size))
+		if (!user_write_access_begin(urelocs, size))
 			goto end;
 
 		for (copied = 0; copied < nreloc; copied++)
 			unsafe_put_user(-1,
 					&urelocs[copied].presumed_offset,
 					end_user);
-		user_access_end();
+		user_write_access_end();
 
 		eb->exec[i].relocs_ptr = (uintptr_t)relocs;
 	}
@@ -1922,7 +1922,7 @@  static int eb_copy_relocations(const struct i915_execbuffer *eb)
 	return 0;
 
 end_user:
-	user_access_end();
+	user_write_access_end();
 end:
 	kvfree(relocs);
 	err = -EFAULT;