[3/9] drivers/firewire/core-iso.c: Convert to use vm_insert_range_buggy
diff mbox series

Message ID 20190111150834.GA2744@jordon-HP-15-Notebook-PC
State New
Headers show
Series
  • Use vm_insert_range and vm_insert_range_buggy
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Commit Message

Souptick Joarder Jan. 11, 2019, 3:08 p.m. UTC
Convert to use vm_insert_range_buggy to map range of kernel memory
to user vma.

This driver has ignored vm_pgoff and mapped the entire pages. We
could later "fix" these drivers to behave according to the normal
vm_pgoff offsetting simply by removing the _buggy suffix on the
function name and if that causes regressions, it gives us an easy
way to revert.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
---
 drivers/firewire/core-iso.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

Patch
diff mbox series

diff --git a/drivers/firewire/core-iso.c b/drivers/firewire/core-iso.c
index 35e784c..99a6582 100644
--- a/drivers/firewire/core-iso.c
+++ b/drivers/firewire/core-iso.c
@@ -107,19 +107,8 @@  int fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
 int fw_iso_buffer_map_vma(struct fw_iso_buffer *buffer,
 			  struct vm_area_struct *vma)
 {
-	unsigned long uaddr;
-	int i, err;
-
-	uaddr = vma->vm_start;
-	for (i = 0; i < buffer->page_count; i++) {
-		err = vm_insert_page(vma, uaddr, buffer->pages[i]);
-		if (err)
-			return err;
-
-		uaddr += PAGE_SIZE;
-	}
-
-	return 0;
+	return vm_insert_range_buggy(vma, buffer->pages,
+					buffer->page_count);
 }
 
 void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer,