[PATCH] savagefb: Fix load failure of the Twister chipset

- The Twister chipsets are actually prosavages.  Reclassify them as
  such and remove the S3_SAVAGE_TWISTER id.
- Fix i2c code if fb_firmware_edid() returns NULL
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/savage/savagefb-i2c.c

@@ -274,10 +274,13 @@ int savagefb_probe_i2c_connector(struct fb_info *info, u8 **out_edid)
 
 	if (!edid) {
 		/* try to get from firmware */
-		edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
-		if (edid)
-			memcpy(edid, fb_firmware_edid(info->device),
-			       EDID_LENGTH);
+		const u8 *e = fb_firmware_edid(info->device);
+
+		if (e) {
+			edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
+			if (edid)
+				memcpy(edid, e, EDID_LENGTH);
+		}
 	}
 
 	if (out_edid)

drivers/video/savage/savagefb.h

@@ -60,8 +60,6 @@
 
 #define S3_SAVAGE_SERIES(chip)    ((chip>=S3_SAVAGE3D) && (chip<=S3_SAVAGE2000))
 
-#define S3_MOBILE_TWISTER_SERIES(chip) ((chip==S3_TWISTER) || (chip == S3_PROSAVAGEDDR))
-
 /* Chip tags.  These are used to group the adapters into
  * related families.
  */
@@ -74,8 +72,6 @@ typedef enum {
   S3_PROSAVAGE,
   S3_SUPERSAVAGE,
   S3_SAVAGE2000,
-  S3_PROSAVAGEDDR,
-  S3_TWISTER,
   S3_LAST
 } savage_chipset;
 

drivers/video/savage/savagefb_driver.c

@@ -1773,8 +1773,7 @@ static int __devinit savage_init_hw (struct savagefb_par *par)
 		}
 	}
 
-	if (S3_SAVAGE_MOBILE_SERIES(par->chip) ||
-	    (S3_MOBILE_TWISTER_SERIES(par->chip) && !par->crtonly))
+	if (S3_SAVAGE_MOBILE_SERIES(par->chip) && !par->crtonly)
 		par->display_type = DISP_LCD;
 	else if (dvi || (par->chip == S3_SAVAGE4 && par->dvi))
 		par->display_type = DISP_DFP;
@@ -1783,7 +1782,7 @@ static int __devinit savage_init_hw (struct savagefb_par *par)
 
 	/* Check LCD panel parrmation */
 
-	if (par->chip == S3_SAVAGE_MX) {
+	if (par->display_type == DISP_LCD) {
 		unsigned char cr6b = VGArCR( 0x6b );
 
 		int panelX = (VGArSEQ (0x61) +
@@ -1922,15 +1921,15 @@ static int __devinit savage_init_fb_info (struct fb_info *info,
 		snprintf (info->fix.id, 16, "ProSavageKM");
 		break;
 	case FB_ACCEL_S3TWISTER_P:
-		par->chip = S3_TWISTER;
+		par->chip = S3_PROSAVAGE;
 		snprintf (info->fix.id, 16, "TwisterP");
 		break;
 	case FB_ACCEL_S3TWISTER_K:
-		par->chip = S3_TWISTER;
+		par->chip = S3_PROSAVAGE;
 		snprintf (info->fix.id, 16, "TwisterK");
 		break;
 	case FB_ACCEL_PROSAVAGE_DDR:
-		par->chip = S3_PROSAVAGEDDR;
+		par->chip = S3_PROSAVAGE;
 		snprintf (info->fix.id, 16, "ProSavageDDR");
 		break;
 	case FB_ACCEL_PROSAVAGE_DDRK: