cmd640 IDE driver internal spinlocks for config etc accesses.

This is no better or worse than the cli/sti the cmd640 driver
used to have, but at least it compiles and works in the new
scheme of things.

Perfection can wait. Especially since that probably involves
removing the PCI-related code, and just trusting the native
Linux direct PCI accesses.

drivers/ide/cmd640.c

@@ -214,17 +214,19 @@ static unsigned int cmd640_chip_version;
  * Therefore, we must use direct IO instead.
  */
 
+/* This is broken, but no more so than the old code.. */
+static spinlock_t cmd640_lock = SPIN_LOCK_UNLOCKED;
+
 /* PCI method 1 access */
 
 static void put_cmd640_reg_pci1 (unsigned short reg, byte val)
 {
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&cmd640_lock, flags);
 	outl_p((reg & 0xfc) | cmd640_key, 0xcf8);
 	outb_p(val, (reg & 3) | 0xcfc);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
 }
 
 static u8 get_cmd640_reg_pci1 (unsigned short reg)
@@ -232,11 +234,10 @@ static u8 get_cmd640_reg_pci1 (unsigned short reg)
 	u8 b;
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&cmd640_lock, flags);
 	outl_p((reg & 0xfc) | cmd640_key, 0xcf8);
 	b = inb_p((reg & 3) | 0xcfc);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
 	return b;
 }
 
@@ -246,12 +247,11 @@ static void put_cmd640_reg_pci2 (unsigned short reg, u8 val)
 {
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&cmd640_lock, flags);
 	outb_p(0x10, 0xcf8);
 	outb_p(val, cmd640_key + reg);
 	outb_p(0, 0xcf8);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
 }
 
 static u8 get_cmd640_reg_pci2 (unsigned short reg)
@@ -259,12 +259,11 @@ static u8 get_cmd640_reg_pci2 (unsigned short reg)
 	u8 b;
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&cmd640_lock, flags);
 	outb_p(0x10, 0xcf8);
 	b = inb_p(cmd640_key + reg);
 	outb_p(0, 0xcf8);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
 	return b;
 }
 
@@ -274,11 +273,10 @@ static void put_cmd640_reg_vlb (unsigned short reg, u8 val)
 {
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&cmd640_lock, flags);
 	outb_p(reg, cmd640_key);
 	outb_p(val, cmd640_key + 4);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
 }
 
 static u8 get_cmd640_reg_vlb (unsigned short reg)
@@ -286,11 +284,10 @@ static u8 get_cmd640_reg_vlb (unsigned short reg)
 	u8 b;
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&cmd640_lock, flags);
 	outb_p(reg, cmd640_key);
 	b = inb_p(cmd640_key + 4);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
 	return b;
 }
 
@@ -367,8 +364,7 @@ static int __init secondary_port_responding (void)
 {
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&cmd640_lock, flags);
 
 	outb_p(0x0a, 0x170 + IDE_SELECT_OFFSET);	/* select drive0 */
 	udelay(100);
@@ -376,11 +372,11 @@ static int __init secondary_port_responding (void)
 		outb_p(0x1a, 0x170 + IDE_SELECT_OFFSET); /* select drive1 */
 		udelay(100);
 		if ((inb_p(0x170 + IDE_SELECT_OFFSET) & 0x1f) != 0x1a) {
-			restore_flags(flags);
+			spin_unlock_irqrestore(&cmd640_lock, flags);
 			return 0; /* nothing responded */
 		}
 	}
-	restore_flags(flags);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
 	return 1; /* success */
 }
 
@@ -461,8 +457,7 @@ static void set_prefetch_mode (unsigned int index, int mode)
 	u8 b;
 	unsigned long flags;
 
-	save_flags(flags);
-	cli();
+	spin_lock_irqsave(&cmd640_lock, flags);
 	b = get_cmd640_reg(reg);
 	if (mode) {	/* want prefetch on? */
 # if CMD640_PREFETCH_MASKS
@@ -478,7 +473,7 @@ static void set_prefetch_mode (unsigned int index, int mode)
 		b |= prefetch_masks[index];	/* disable prefetch */
 	}
 	put_cmd640_reg(reg, b);
-	restore_flags(flags);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
 }
 
 /*
@@ -579,8 +574,7 @@ static void program_drive_counts (unsigned int index)
 	/*
 	 * Now that everything is ready, program the new timings
 	 */
-	save_flags (flags);
-	cli();
+	spin_lock(&cmd640_lock, flags);
 	/*
 	 * Program the address_setup clocks into ARTTIM reg,
 	 * and then the active/recovery counts into the DRWTIM reg
@@ -589,7 +583,7 @@ static void program_drive_counts (unsigned int index)
 	setup_count |= get_cmd640_reg(arttim_regs[index]) & 0x3f;
 	put_cmd640_reg(arttim_regs[index], setup_count);
 	put_cmd640_reg(drwtim_regs[index], pack_nibbles(active_count, recovery_count));
-	restore_flags(flags);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
 }
 
 /*