X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fi2c%2Fbusses%2Fi2c-elektor.c;h=2fda2b8448a6bcb486e745cc5219eb298002e364;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=f6bd38b060eb65d6ca421ae17f42dba2e514870b;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git

diff --git a/drivers/i2c/busses/i2c-elektor.c b/drivers/i2c/busses/i2c-elektor.c
index f6bd38b06..2fda2b844 100644
--- a/drivers/i2c/busses/i2c-elektor.c
+++ b/drivers/i2c/busses/i2c-elektor.c
@@ -59,6 +59,7 @@ static int mmapped;
 
 static wait_queue_head_t pcf_wait;
 static int pcf_pending;
+static spinlock_t lock;
 
 /* ----- local functions ----------------------------------------------	*/
 
@@ -79,10 +80,10 @@ static void pcf_isa_setbyte(void *data, int ctl, int val)
 		break;
 	case 2: /* double mapped I/O needed for UP2000 board,
                    I don't know why this... */
-		writeb(val, address);
+		writeb(val, (void *)address);
 		/* fall */
 	case 1: /* memory mapped I/O */
-		writeb(val, address);
+		writeb(val, (void *)address);
 		break;
 	}
 }
@@ -90,7 +91,7 @@ static void pcf_isa_setbyte(void *data, int ctl, int val)
 static int pcf_isa_getbyte(void *data, int ctl)
 {
 	int address = ctl ? (base + 1) : base;
-	int val = mmapped ? readb(address) : inb(address);
+	int val = mmapped ? readb((void *)address) : inb(address);
 
 	pr_debug("i2c-elektor: Read 0x%X 0x%02X\n", address, val);
 
@@ -111,14 +112,24 @@ static int pcf_isa_getclock(void *data)
 static void pcf_isa_waitforpin(void) {
 
 	int timeout = 2;
+	long flags;
 
 	if (irq > 0) {
-		cli();
+		spin_lock_irqsave(&lock, flags);
 		if (pcf_pending == 0) {
-			interruptible_sleep_on_timeout(&pcf_wait, timeout*HZ );
-		} else
+			spin_unlock_irqrestore(&lock, flags);
+			if (interruptible_sleep_on_timeout(&pcf_wait,
+								timeout*HZ)) {
+				spin_lock_irqsave(&lock, flags);
+				if (pcf_pending == 1) {
+					pcf_pending = 0;
+				}
+				spin_unlock_irqrestore(&lock, flags);
+			}
+		} else {
 			pcf_pending = 0;
-		sti();
+			spin_unlock_irqrestore(&lock, flags);
+		}
 	} else {
 		udelay(100);
 	}
@@ -126,7 +137,9 @@ static void pcf_isa_waitforpin(void) {
 
 
 static irqreturn_t pcf_isa_handler(int this_irq, void *dev_id, struct pt_regs *regs) {
+	spin_lock(&lock);
 	pcf_pending = 1;
+	spin_unlock(&lock);
 	wake_up_interruptible(&pcf_wait);
 	return IRQ_HANDLED;
 }
@@ -134,6 +147,7 @@ static irqreturn_t pcf_isa_handler(int this_irq, void *dev_id, struct pt_regs *r
 
 static int pcf_isa_init(void)
 {
+	spin_lock_init(&lock);
 	if (!mmapped) {
 		if (!request_region(base, 2, "i2c (isa bus adapter)")) {
 			printk(KERN_ERR
@@ -180,11 +194,10 @@ static int __init i2c_pcfisa_init(void)
 	/* check to see we have memory mapped PCF8584 connected to the 
 	Cypress cy82c693 PCI-ISA bridge as on UP2000 board */
 	if (base == 0) {
+		struct pci_dev *cy693_dev;
 		
-		struct pci_dev *cy693_dev =
-                    pci_find_device(PCI_VENDOR_ID_CONTAQ, 
-		                    PCI_DEVICE_ID_CONTAQ_82C693, NULL);
-
+		cy693_dev = pci_get_device(PCI_VENDOR_ID_CONTAQ, 
+					   PCI_DEVICE_ID_CONTAQ_82C693, NULL);
 		if (cy693_dev) {
 			char config;
 			/* yeap, we've found cypress, let's check config */
@@ -215,6 +228,7 @@ static int __init i2c_pcfisa_init(void)
 					printk(KERN_INFO "i2c-elektor: found API UP2000 like board, will probe PCF8584 later.\n");
 				}
 			}
+			pci_dev_put(cy693_dev);
 		}
 	}
 #endif