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[v2,09/41] media: atomisp: hmm_bo: untag user pointers

Message ID 5ec48b790129c5559aa8a2e41f13a12ba9b7d38e.1590821410.git.mchehab+huawei@kernel.org (mailing list archive)
State New, archived
Headers show
Series More atomisp fixes and cleanups | expand

Commit Message

Mauro Carvalho Chehab May 30, 2020, 6:55 a.m. UTC 
The kernel ABI was extended to allow pass tagged user pointers.

Untag the pointers in this function.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/staging/media/atomisp/pci/hmm/hmm_bo.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/staging/media/atomisp/pci/hmm/hmm_bo.c b/drivers/staging/media/atomisp/pci/hmm/hmm_bo.c
index 492b76c29490..6fce8c95be1d 100644
--- a/drivers/staging/media/atomisp/pci/hmm/hmm_bo.c
+++ b/drivers/staging/media/atomisp/pci/hmm/hmm_bo.c
@@ -997,6 +997,9 @@  static int alloc_user_pages(struct hmm_buffer_object *bo,
 	 * Handle frame buffer allocated in other kerenl space driver
 	 * and map to user space
 	 */
+
+	userptr = untagged_addr(userptr);
+
 	if (vma->vm_flags & (VM_IO | VM_PFNMAP)) {
 		page_nr = get_pfnmap_pages(current, current->mm,
 					   (unsigned long)userptr,