viafb: fix proc entry removal

viafb: fix proc entry removal

Trying to remove unregistered proc entries became painful and is
useless anyway. So remove the removal of an entry that was never
registered and duplicate the logic for one which is added
conditionally. Additionally move the removal above releasing fb_info
as we still need the information.
This prevents tainting the kernel by the procfs warn on and
avoiding access to already freed memory is probably also a good idea.

Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index e94f913f87be3c95b61e06e03d60e4a81c5368d3..51e9106138ce3b27f4c0ca369606f5d50aba346b 100644 (file)
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -1702,13 +1702,16 @@ static void viafb_init_proc(struct proc_dir_entry **viafb_entry)
 }
 static void viafb_remove_proc(struct proc_dir_entry *viafb_entry)
 {
-       /* no problem if it was not registered */
+       struct chip_information *chip_info = &viaparinfo->shared->chip_info;
+
        remove_proc_entry("dvp0", viafb_entry);/* parent dir */
        remove_proc_entry("dvp1", viafb_entry);
        remove_proc_entry("dfph", viafb_entry);
        remove_proc_entry("dfpl", viafb_entry);
-       remove_proc_entry("vt1636", viafb_entry);
-       remove_proc_entry("vt1625", viafb_entry);
+       if (chip_info->lvds_chip_info.lvds_chip_name == VT1636_LVDS
+               || chip_info->lvds_chip_info2.lvds_chip_name == VT1636_LVDS)
+               remove_proc_entry("vt1636", viafb_entry);
+
        remove_proc_entry("viafb", NULL);
 }
 
@@ -1967,12 +1970,10 @@ void __devexit via_fb_pci_remove(struct pci_dev *pdev)
        unregister_framebuffer(viafbinfo);
        if (viafb_dual_fb)
                unregister_framebuffer(viafbinfo1);
-
+       viafb_remove_proc(viaparinfo->shared->proc_entry);
        framebuffer_release(viafbinfo);
        if (viafb_dual_fb)
                framebuffer_release(viafbinfo1);
-
-       viafb_remove_proc(viaparinfo->shared->proc_entry);
 }
 
 #ifndef MODULE