VIDEO: Correct use of request_region/request_mem_region

request_region should be used with release_region, not request_mem_region.

Geert Uytterhoeven pointed out that in the case of drivers/video/gbefb.c,
the problem is actually the other way around; request_mem_region should be
used instead of request_region.

The semantic patch that finds/fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r1@
expression start;
@@

request_region(start,...)

@b1@
expression r1.start;
@@

request_mem_region(start,...)

@depends on !b1@
expression r1.start;
expression E;
@@

- release_mem_region
+ release_region
  (start,E)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/drivers/video/tdfxfb.c b/drivers/video/tdfxfb.c
index 9805483..3ee5e63 100644 (file)
--- a/drivers/video/tdfxfb.c
+++ b/drivers/video/tdfxfb.c
@@ -1571,8 +1571,8 @@ out_err_iobase:
        if (default_par->mtrr_handle >= 0)
                mtrr_del(default_par->mtrr_handle, info->fix.smem_start,
                         info->fix.smem_len);
-       release_mem_region(pci_resource_start(pdev, 2),
-                          pci_resource_len(pdev, 2));
+       release_region(pci_resource_start(pdev, 2),
+                      pci_resource_len(pdev, 2));
 out_err_screenbase:
        if (info->screen_base)
                iounmap(info->screen_base);