[PATCH] ioremap balanced with iounmap for drivers/video/tridentfb

ioremap must be balanced by an iounmap and failing to do so can result in a
memory leak.

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Knut Petersen <Knut_Petersen@t-online.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/video/tridentfb.c b/drivers/video/tridentfb.c
index 14175cd..55e8aa4 100644 (file)
--- a/drivers/video/tridentfb.c
+++ b/drivers/video/tridentfb.c
@@ -1130,7 +1130,8 @@ static int __devinit trident_pci_probe(struct pci_dev * dev, const struct pci_de
        
        if (!request_mem_region(tridentfb_fix.smem_start, tridentfb_fix.smem_len, "tridentfb")) {
                debug("request_mem_region failed!\n");
-               return -1;
+               err = -1;
+               goto out_unmap;
        }
 
        fb_info.screen_base = ioremap_nocache(tridentfb_fix.smem_start,
@@ -1139,7 +1140,8 @@ static int __devinit trident_pci_probe(struct pci_dev * dev, const struct pci_de
        if (!fb_info.screen_base) {
                release_mem_region(tridentfb_fix.smem_start, tridentfb_fix.smem_len);
                debug("ioremap failed\n");
-               return -1;
+               err = -1;
+               goto out_unmap;
        }
 
        output("%s board found\n", pci_name(dev));
@@ -1162,8 +1164,10 @@ static int __devinit trident_pci_probe(struct pci_dev * dev, const struct pci_de
 #endif
        fb_info.pseudo_palette = pseudo_pal;
 
-       if (!fb_find_mode(&default_var,&fb_info,mode,NULL,0,NULL,bpp))
-               return -EINVAL;
+       if (!fb_find_mode(&default_var,&fb_info,mode,NULL,0,NULL,bpp)) {
+               err = -EINVAL;
+               goto out_unmap;
+       }
        fb_alloc_cmap(&fb_info.cmap,256,0);
        if (defaultaccel && acc)
                default_var.accel_flags |= FB_ACCELF_TEXT;
@@ -1174,12 +1178,20 @@ static int __devinit trident_pci_probe(struct pci_dev * dev, const struct pci_de
        fb_info.device = &dev->dev;
        if (register_framebuffer(&fb_info) < 0) {
                printk(KERN_ERR "tridentfb: could not register Trident framebuffer\n");
-               return -EINVAL;
+               err = -EINVAL;
+               goto out_unmap;
        }
        output("fb%d: %s frame buffer device %dx%d-%dbpp\n",
           fb_info.node, fb_info.fix.id,default_var.xres,
           default_var.yres,default_var.bits_per_pixel);
        return 0;
+
+out_unmap:
+       if (default_par.io_virt)
+               iounmap(default_par.io_virt);
+       if (fb_info.screen_base)
+               iounmap(fb_info.screen_base);
+       return err;
 }
 
 static void __devexit trident_pci_remove(struct pci_dev * dev)