[PATCH] matroxfb adjustments

Some adjustments to the matroxfb code, for one part preventing the display
to be disabled for longer than necessary, and for the other part to make
information about the frame buffer position available so that a kernel
debugger might obtain that before the initial mode change.

Finally, some return code corrections to fit the generic fb code.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Petr Vandrovec <vandrove@vc.cvut.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/matrox/matroxfb_base.c

@@ -1285,7 +1285,7 @@ static int matroxfb_getmemory(WPMINFO unsigned int maxSize, unsigned int *realSi
 	vaddr_t vm;
 	unsigned int offs;
 	unsigned int offs2;
-	unsigned char store;
+	unsigned char store, orig;
 	unsigned char bytes[32];
 	unsigned char* tmp;
 
@@ -1298,7 +1298,8 @@ static int matroxfb_getmemory(WPMINFO unsigned int maxSize, unsigned int *realSi
 	if (maxSize > 0x2000000) maxSize = 0x2000000;
 
 	mga_outb(M_EXTVGA_INDEX, 0x03);
-	mga_outb(M_EXTVGA_DATA, mga_inb(M_EXTVGA_DATA) | 0x80);
+	orig = mga_inb(M_EXTVGA_DATA);
+	mga_outb(M_EXTVGA_DATA, orig | 0x80);
 
 	store = mga_readb(vm, 0x1234);
 	tmp = bytes;
@@ -1323,7 +1324,7 @@ static int matroxfb_getmemory(WPMINFO unsigned int maxSize, unsigned int *realSi
 	mga_writeb(vm, 0x1234, store);
 
 	mga_outb(M_EXTVGA_INDEX, 0x03);
-	mga_outb(M_EXTVGA_DATA, mga_inb(M_EXTVGA_DATA) & ~0x80);
+	mga_outb(M_EXTVGA_DATA, orig);
 
 	*realSize = offs - 0x100000;
 #ifdef CONFIG_FB_MATROX_MILLENIUM
@@ -1858,6 +1859,8 @@ static int initMatrox2(WPMINFO struct board* b){
 							to yres_virtual * xres_virtual < 2^32 */
 	}
 	matroxfb_init_fix(PMINFO2);
+	ACCESS_FBINFO(fbcon.screen_base) = vaddr_va(ACCESS_FBINFO(video.vbase));
+	matroxfb_update_fix(PMINFO2);
 	/* Normalize values (namely yres_virtual) */
 	matroxfb_check_var(&vesafb_defined, &ACCESS_FBINFO(fbcon));
 	/* And put it into "current" var. Do NOT program hardware yet, or we'll not take over
@@ -2010,11 +2013,11 @@ static int matroxfb_probe(struct pci_dev* pdev, const struct pci_device_id* dumm
 	}
 	/* not match... */
 	if (!b->vendor)
-		return -1;
+		return -ENODEV;
 	if (dev > 0) {
 		/* not requested one... */
 		dev--;
-		return -1;
+		return -ENODEV;
 	}
 	pci_read_config_dword(pdev, PCI_COMMAND, &cmd);
 	if (pci_enable_device(pdev)) {