rivafb/nvidiafb: Various cleanups

Various cleanups to rivafb/nvidiafb's I2C code:
* Drop useless par->bus.
* Refactor I2C bus deletion code.
* Drop useless variable initialization.
* Remove unneeded include of <linux/i2c-id.h>.
* Simplify +1/-1.
* Add __devinit tags where possible.

[adaplas]
The varible initialization are not useless. However, rivafb must
check if i2c bus are created properly before reading the EDID
block.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/nvidia/nv_i2c.c

@@ -127,8 +127,6 @@ static int nvidia_setup_i2c_bus(struct nvidia_i2c_chan *chan, const char *name,
 
 void nvidia_create_i2c_busses(struct nvidia_par *par)
 {
-	par->bus = 3;
-
 	par->chan[0].par = par;
 	par->chan[1].par = par;
 	par->chan[2].par = par;
@@ -145,18 +143,14 @@ void nvidia_create_i2c_busses(struct nvidia_par *par)
 
 void nvidia_delete_i2c_busses(struct nvidia_par *par)
 {
-	if (par->chan[0].par)
-		i2c_del_adapter(&par->chan[0].adapter);
-	par->chan[0].par = NULL;
-
-	if (par->chan[1].par)
-		i2c_del_adapter(&par->chan[1].adapter);
-	par->chan[1].par = NULL;
-
-	if (par->chan[2].par)
-		i2c_del_adapter(&par->chan[2].adapter);
-	par->chan[2].par = NULL;
+	int i;
 
+	for (i = 0; i < 3; i++) {
+		if (!par->chan[i].par)
+			continue;
+		i2c_del_adapter(&par->chan[i].adapter);
+		par->chan[i].par = NULL;
+	}
 }
 
 int nvidia_probe_i2c_connector(struct fb_info *info, int conn, u8 **out_edid)

drivers/video/nvidia/nv_type.h

@@ -4,7 +4,6 @@
 #include <linux/fb.h>
 #include <linux/types.h>
 #include <linux/i2c.h>
-#include <linux/i2c-id.h>
 #include <linux/i2c-algo-bit.h>
 
 #define NV_ARCH_04  0x04
@@ -100,7 +99,6 @@ struct nvidia_par {
 	u32 Architecture;
 	u32 CursorStart;
 	int Chipset;
-	int bus;
 	unsigned long FbAddress;
 	u8 __iomem *FbStart;
 	u32 FbMapSize;

drivers/video/riva/fbdev.c

@@ -1788,10 +1788,10 @@ static int __devinit riva_get_EDID_i2c(struct fb_info *info)
 
 	NVTRACE_ENTER();
 	riva_create_i2c_busses(par);
-	for (i = 0; i < par->bus; i++) {
+	for (i = 0; i < 3; i++) {
 		if (!par->chan[i].par)
 			continue;
-		riva_probe_i2c_connector(par, i+1, &par->EDID);
+		riva_probe_i2c_connector(par, i, &par->EDID);
 		if (par->EDID && !fb_parse_edid(par->EDID, &var)) {
 			printk(PFX "Found EDID Block from BUS %i\n", i);
 			break;

drivers/video/riva/rivafb-i2c.c

@@ -88,7 +88,8 @@ static int riva_gpio_getsda(void* data)
 	return val;
 }
 
-static int riva_setup_i2c_bus(struct riva_i2c_chan *chan, const char *name,
+static int __devinit riva_setup_i2c_bus(struct riva_i2c_chan *chan,
+					const char *name,
 					unsigned int i2c_class)
 {
 	int rc;
@@ -126,10 +127,8 @@ static int riva_setup_i2c_bus(struct riva_i2c_chan *chan, const char *name,
 	return rc;
 }
 
-void riva_create_i2c_busses(struct riva_par *par)
+void __devinit riva_create_i2c_busses(struct riva_par *par)
 {
-	par->bus = 3;
-
 	par->chan[0].par	= par;
 	par->chan[1].par	= par;
 	par->chan[2].par        = par;
@@ -144,24 +143,22 @@ void riva_create_i2c_busses(struct riva_par *par)
 
 void riva_delete_i2c_busses(struct riva_par *par)
 {
-	if (par->chan[0].par)
-		i2c_del_adapter(&par->chan[0].adapter);
-	par->chan[0].par = NULL;
-
-	if (par->chan[1].par)
-		i2c_del_adapter(&par->chan[1].adapter);
-	par->chan[1].par = NULL;
+	int i;
 
-	if (par->chan[2].par)
-		i2c_del_adapter(&par->chan[2].adapter);
-	par->chan[2].par = NULL;
+	for (i = 0; i < 3; i++) {
+		if (!par->chan[i].par)
+			continue;
+		i2c_del_adapter(&par->chan[i].adapter);
+		par->chan[i].par = NULL;
+	}
 }
 
-int riva_probe_i2c_connector(struct riva_par *par, int conn, u8 **out_edid)
+int __devinit riva_probe_i2c_connector(struct riva_par *par, int conn, u8 **out_edid)
 {
 	u8 *edid = NULL;
 
-	edid = fb_ddc_read(&par->chan[conn-1].adapter);
+	if (par->chan[conn].par)
+		edid = fb_ddc_read(&par->chan[conn].adapter);
 
 	if (out_edid)
 		*out_edid = edid;

drivers/video/riva/rivafb.h

@@ -4,7 +4,6 @@
 #include <linux/fb.h>
 #include <video/vga.h>
 #include <linux/i2c.h>
-#include <linux/i2c-id.h>
 #include <linux/i2c-algo-bit.h>
 
 #include "riva_hw.h"
@@ -61,7 +60,6 @@ struct riva_par {
 	Bool SecondCRTC;
 	int FlatPanel;
 	struct pci_dev *pdev;
-	int bus;
 	int cursor_reset;
 #ifdef CONFIG_MTRR
 	struct { int vram; int vram_valid; } mtrr;