1 files changed, 11 insertions, 27 deletions

diff --git a/drivers/video/sis/sis_main.c b/drivers/video/sis/sis_main.c
index b52f8e4ef1fd..7e3370f115b6 100644
--- a/drivers/video/sis/sis_main.c
+++ b/drivers/video/sis/sis_main.c
@@ -60,6 +60,11 @@
 #include "sis.h"
 #include "sis_main.h"
 
+#if !defined(CONFIG_FB_SIS_300) && !defined(CONFIG_FB_SIS_315)
+#warning Neither CONFIG_FB_SIS_300 nor CONFIG_FB_SIS_315 is set
+#warning sisfb will not work!
+#endif
+
 static void sisfb_handle_command(struct sis_video_info *ivideo,
                                  struct sisfb_cmd *sisfb_command);
 
@@ -4114,14 +4119,6 @@ sisfb_find_rom(struct pci_dev *pdev)
                         if(sisfb_check_rom(rom_base, ivideo)) {
 
                                 if((myrombase = vmalloc(65536))) {
-
-                                        /* Work around bug in pci/rom.c: Folks forgot to check
-                                         * whether the size retrieved from the BIOS image eventually
-                                         * is larger than the mapped size
-                                         */
-                                        if(pci_resource_len(pdev, PCI_ROM_RESOURCE) < romsize)
-                                                romsize = pci_resource_len(pdev, PCI_ROM_RESOURCE);
-
                                         memcpy_fromio(myrombase, rom_base,
                                                         (romsize > 65536) ? 65536 : romsize);
                                 }
@@ -4155,23 +4152,6 @@ sisfb_find_rom(struct pci_dev *pdev)
 
         }
 
-#else
-
-        pci_read_config_dword(pdev, PCI_ROM_ADDRESS, &temp);
-        pci_write_config_dword(pdev, PCI_ROM_ADDRESS,
-                        (ivideo->video_base & PCI_ROM_ADDRESS_MASK) | PCI_ROM_ADDRESS_ENABLE);
-
-        rom_base = ioremap(ivideo->video_base, 65536);
-        if(rom_base) {
-                if(sisfb_check_rom(rom_base, ivideo)) {
-                        if((myrombase = vmalloc(65536)))
-                                memcpy_fromio(myrombase, rom_base, 65536);
-                }
-                iounmap(rom_base);
-        }
-
-        pci_write_config_dword(pdev, PCI_ROM_ADDRESS, temp);
-
 #endif
 
         return myrombase;
@@ -4181,6 +4161,9 @@ static void __devinit
 sisfb_post_map_vram(struct sis_video_info *ivideo, unsigned int *mapsize,
                         unsigned int min)
 {
+        if (*mapsize < (min << 20))
+                return;
+
         ivideo->video_vbase = ioremap(ivideo->video_base, (*mapsize));
 
         if(!ivideo->video_vbase) {
@@ -4514,7 +4497,7 @@ sisfb_post_sis300(struct pci_dev *pdev)
         } else {
 #endif
                 /* Need to map max FB size for finding out about RAM size */
-                mapsize = 64 << 20;
+                mapsize = ivideo->video_size;
                 sisfb_post_map_vram(ivideo, &mapsize, 4);
 
                 if(ivideo->video_vbase) {
@@ -4680,7 +4663,7 @@ sisfb_post_xgi_ramsize(struct sis_video_info *ivideo)
         orSISIDXREG(SISSR, 0x20, (0x80 | 0x04));
 
         /* Need to map max FB size for finding out about RAM size */
-        mapsize = 256 << 20;
+        mapsize = ivideo->video_size;
         sisfb_post_map_vram(ivideo, &mapsize, 32);
 
         if(!ivideo->video_vbase) {
@@ -5936,6 +5919,7 @@ sisfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         }
 
         ivideo->video_base = pci_resource_start(pdev, 0);
+        ivideo->video_size = pci_resource_len(pdev, 0);
         ivideo->mmio_base  = pci_resource_start(pdev, 1);
         ivideo->mmio_size  = pci_resource_len(pdev, 1);
         ivideo->SiS_Pr.RelIO = pci_resource_start(pdev, 2) + 0x30;