drivers/char: minor irq handler cleanups

- remove always-false tests

- don't overload 'irq' argument, pass data properly via dev_id

- remove pointless casts from void*

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

8 files changed, 42 insertions, 52 deletions

diff --git a/drivers/char/mwave/tp3780i.c b/drivers/char/mwave/tp3780i.c
index f282976daaac..37fe80df0b91 100644
--- a/drivers/char/mwave/tp3780i.c
+++ b/drivers/char/mwave/tp3780i.c
@@ -97,20 +97,24 @@ static void EnableSRAM(THINKPAD_BD_DATA * pBDData)
 
 static irqreturn_t UartInterrupt(int irq, void *dev_id)
 {
+	int irqno = (int)(unsigned long) dev_id;
+
 	PRINTK_3(TRACE_TP3780I,
-		"tp3780i::UartInterrupt entry irq %x dev_id %p\n", irq, dev_id);
+		"tp3780i::UartInterrupt entry irq %x dev_id %p\n", irqno, dev_id);
 	return IRQ_HANDLED;
 }
 
 static irqreturn_t DspInterrupt(int irq, void *dev_id)
 {
+	int irqno = (int)(unsigned long) dev_id;
+
 	pMWAVE_DEVICE_DATA pDrvData = &mwave_s_mdd;
 	DSP_3780I_CONFIG_SETTINGS *pSettings = &pDrvData->rBDData.rDspSettings;
 	unsigned short usDspBaseIO = pSettings->usDspBaseIO;
 	unsigned short usIPCSource = 0, usIsolationMask, usPCNum;
 
 	PRINTK_3(TRACE_TP3780I,
-		"tp3780i::DspInterrupt entry irq %x dev_id %p\n", irq, dev_id);
+		"tp3780i::DspInterrupt entry irq %x dev_id %p\n", irqno, dev_id);
 
 	if (dsp3780I_GetIPCSource(usDspBaseIO, &usIPCSource) == 0) {
 		PRINTK_2(TRACE_TP3780I,
@@ -361,14 +365,16 @@ int tp3780I_EnableDSP(THINKPAD_BD_DATA * pBDData)
 	pSettings->bPllBypass = TP_CFG_PllBypass;
 	pSettings->usChipletEnable = TP_CFG_ChipletEnable;
 
-	if (request_irq(pSettings->usUartIrq, &UartInterrupt, 0, "mwave_uart", NULL)) {
+	if (request_irq(pSettings->usUartIrq, &UartInterrupt, 0, "mwave_uart",
+			(void *)(unsigned long) pSettings->usUartIrq)) {
 		PRINTK_ERROR(KERN_ERR_MWAVE "tp3780i::tp3780I_EnableDSP: Error: Could not get UART IRQ %x\n", pSettings->usUartIrq);
 		goto exit_cleanup;
 	} else {		/* no conflict just release */
 		free_irq(pSettings->usUartIrq, NULL);
 	}
 
-	if (request_irq(pSettings->usDspIrq, &DspInterrupt, 0, "mwave_3780i", NULL)) {
+	if (request_irq(pSettings->usDspIrq, &DspInterrupt, 0, "mwave_3780i",
+			(void *)(unsigned long) pSettings->usDspIrq)) {
 		PRINTK_ERROR("tp3780i::tp3780I_EnableDSP: Error: Could not get 3780i IRQ %x\n", pSettings->usDspIrq);
 		goto exit_cleanup;
 	} else {
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 279ff5005cec..4e84d233e5a2 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -1225,17 +1225,15 @@ static void ri_change(MGSLPC_INFO *info)
  * irq     interrupt number that caused interrupt
  * dev_id  device ID supplied during interrupt registration
  */
-static irqreturn_t mgslpc_isr(int irq, void *dev_id)
+static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 {
-	MGSLPC_INFO * info = (MGSLPC_INFO *)dev_id;
+	MGSLPC_INFO *info = dev_id;
 	unsigned short isr;
 	unsigned char gis, pis;
 	int count=0;
 
 	if (debug_level >= DEBUG_LEVEL_ISR)
-		printk("mgslpc_isr(%d) entry.\n", irq);
-	if (!info)
-		return IRQ_NONE;
+		printk("mgslpc_isr(%d) entry.\n", info->irq_level);
 
 	if (!(info->p_dev->_locked))
 		return IRQ_HANDLED;
@@ -1327,7 +1325,7 @@ static irqreturn_t mgslpc_isr(int irq, void *dev_id)
 
 	if (debug_level >= DEBUG_LEVEL_ISR)
 		printk("%s(%d):mgslpc_isr(%d)exit.\n",
-		       __FILE__,__LINE__,irq);
+		       __FILE__, __LINE__, info->irq_level);
 
 	return IRQ_HANDLED;
 }
diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index 5ff83df67b44..4b5b5b78acb4 100644
--- a/drivers/char/specialix.c
+++ b/drivers/char/specialix.c
@@ -443,8 +443,7 @@ void missed_irq (unsigned long data)
 	spin_unlock_irqrestore(&bp->lock, flags);
 	if (irq) {
 		printk (KERN_INFO "Missed interrupt... Calling int from timer. \n");
-		sx_interrupt (((struct specialix_board *)data)->irq,
-				(void*)data);
+		sx_interrupt (-1, bp);
 	}
 	mod_timer(&missed_irq_timer, jiffies + sx_poll);
 }
@@ -862,23 +861,22 @@ static inline void sx_check_modem(struct specialix_board * bp)
 
 
 /* The main interrupt processing routine */
-static irqreturn_t sx_interrupt(int irq, void *dev_id)
+static irqreturn_t sx_interrupt(int dummy, void *dev_id)
 {
 	unsigned char status;
 	unsigned char ack;
-	struct specialix_board *bp;
+	struct specialix_board *bp = dev_id;
 	unsigned long loop = 0;
 	int saved_reg;
 	unsigned long flags;
 
 	func_enter();
 
-	bp = dev_id;
 	spin_lock_irqsave(&bp->lock, flags);
 
 	dprintk (SX_DEBUG_FLOW, "enter %s port %d room: %ld\n", __FUNCTION__, port_No(sx_get_port(bp, "INT")), SERIAL_XMIT_SIZE - sx_get_port(bp, "ITN")->xmit_cnt - 1);
 	if (!(bp->flags & SX_BOARD_ACTIVE)) {
-		dprintk (SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", irq);
+		dprintk (SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", bp->irq);
 		spin_unlock_irqrestore(&bp->lock, flags);
 		func_exit();
 		return IRQ_NONE;
diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c
index feac54e32a12..874aaa08e956 100644
--- a/drivers/char/stallion.c
+++ b/drivers/char/stallion.c
@@ -1645,7 +1645,7 @@ static irqreturn_t stl_intr(int irq, void *dev_id)
 {
 	struct stlbrd *brdp = dev_id;
 
-	pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq);
+	pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq);
 
 	return IRQ_RETVAL((* brdp->isr)(brdp));
 }
diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index ddc74d1f4f1b..a3237d48a584 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -1695,20 +1695,16 @@ static void mgsl_isr_transmit_dma( struct mgsl_struct *info )
  * 	
  * Return Value: None
  */
-static irqreturn_t mgsl_interrupt(int irq, void *dev_id)
+static irqreturn_t mgsl_interrupt(int dummy, void *dev_id)
 {
-	struct mgsl_struct * info;
+	struct mgsl_struct *info = dev_id;
 	u16 UscVector;
 	u16 DmaVector;
 
 	if ( debug_level >= DEBUG_LEVEL_ISR )	
-		printk("%s(%d):mgsl_interrupt(%d)entry.\n",
-			__FILE__,__LINE__,irq);
+		printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)entry.\n",
+			__FILE__, __LINE__, info->irq_level);
 
-	info = (struct mgsl_struct *)dev_id;	
-	if (!info)
-		return IRQ_NONE;
-		
 	spin_lock(&info->irq_spinlock);
 
 	for(;;) {
@@ -1732,8 +1728,8 @@ static irqreturn_t mgsl_interrupt(int irq, void *dev_id)
 			mgsl_isr_receive_dma(info);
 
 		if ( info->isr_overflow ) {
-			printk(KERN_ERR"%s(%d):%s isr overflow irq=%d\n",
-				__FILE__,__LINE__,info->device_name, irq);
+			printk(KERN_ERR "%s(%d):%s isr overflow irq=%d\n",
+				__FILE__, __LINE__, info->device_name, info->irq_level);
 			usc_DisableMasterIrqBit(info);
 			usc_DisableDmaInterrupts(info,DICR_MASTER);
 			break;
@@ -1755,8 +1751,9 @@ static irqreturn_t mgsl_interrupt(int irq, void *dev_id)
 	spin_unlock(&info->irq_spinlock);
 	
 	if ( debug_level >= DEBUG_LEVEL_ISR )	
-		printk("%s(%d):mgsl_interrupt(%d)exit.\n",
-			__FILE__,__LINE__,irq);
+		printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)exit.\n",
+			__FILE__, __LINE__, info->irq_level);
+
 	return IRQ_HANDLED;
 }	/* end of mgsl_interrupt() */
 
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index 1f954acf2bac..3c89266c8255 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -491,7 +491,6 @@ static void isr_serial(struct slgt_info *info);
 static void isr_rdma(struct slgt_info *info);
 static void isr_txeom(struct slgt_info *info, unsigned short status);
 static void isr_tdma(struct slgt_info *info);
-static irqreturn_t slgt_interrupt(int irq, void *dev_id);
 
 static int  alloc_dma_bufs(struct slgt_info *info);
 static void free_dma_bufs(struct slgt_info *info);
@@ -2326,17 +2325,13 @@ static void isr_gpio(struct slgt_info *info, unsigned int changed, unsigned int
  * 	irq	interrupt number
  * 	dev_id	device ID supplied during interrupt registration
  */
-static irqreturn_t slgt_interrupt(int irq, void *dev_id)
+static irqreturn_t slgt_interrupt(int dummy, void *dev_id)
 {
-	struct slgt_info *info;
+	struct slgt_info *info = dev_id;
 	unsigned int gsr;
 	unsigned int i;
 
-	DBGISR(("slgt_interrupt irq=%d entry\n", irq));
-
-	info = dev_id;
-	if (!info)
-		return IRQ_NONE;
+	DBGISR(("slgt_interrupt irq=%d entry\n", info->irq_level));
 
 	spin_lock(&info->lock);
 
@@ -2385,7 +2380,7 @@ static irqreturn_t slgt_interrupt(int irq, void *dev_id)
 
 	spin_unlock(&info->lock);
 
-	DBGISR(("slgt_interrupt irq=%d exit\n", irq));
+	DBGISR(("slgt_interrupt irq=%d exit\n", info->irq_level));
 	return IRQ_HANDLED;
 }
 
diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c
index f3e7807f78d9..c96062ea72b4 100644
--- a/drivers/char/synclinkmp.c
+++ b/drivers/char/synclinkmp.c
@@ -2586,9 +2586,9 @@ void isr_io_pin( SLMP_INFO *info, u16 status )
  * 	dev_id		device ID supplied during interrupt registration
  * 	regs		interrupted processor context
  */
-static irqreturn_t synclinkmp_interrupt(int irq, void *dev_id)
+static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id)
 {
-	SLMP_INFO * info;
+	SLMP_INFO *info = dev_id;
 	unsigned char status, status0, status1=0;
 	unsigned char dmastatus, dmastatus0, dmastatus1=0;
 	unsigned char timerstatus0, timerstatus1=0;
@@ -2597,12 +2597,8 @@ static irqreturn_t synclinkmp_interrupt(int irq, void *dev_id)
 	unsigned short tmp;
 
 	if ( debug_level >= DEBUG_LEVEL_ISR )
-		printk("%s(%d): synclinkmp_interrupt(%d)entry.\n",
-			__FILE__,__LINE__,irq);
-
-	info = (SLMP_INFO *)dev_id;
-	if (!info)
-		return IRQ_NONE;
+		printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n",
+			__FILE__, __LINE__, info->irq_level);
 
 	spin_lock(&info->lock);
 
@@ -2615,9 +2611,9 @@ static irqreturn_t synclinkmp_interrupt(int irq, void *dev_id)
 		timerstatus0 = read_reg(info, ISR2);
 
 		if ( debug_level >= DEBUG_LEVEL_ISR )
-			printk("%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
-				__FILE__,__LINE__,info->device_name,
-				status0,dmastatus0,timerstatus0);
+			printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n",
+				__FILE__, __LINE__, info->device_name,
+				status0, dmastatus0, timerstatus0);
 
 		if (info->port_count == 4) {
 			/* get status for SCA1 (ports 2-3) */
@@ -2702,8 +2698,8 @@ static irqreturn_t synclinkmp_interrupt(int irq, void *dev_id)
 	spin_unlock(&info->lock);
 
 	if ( debug_level >= DEBUG_LEVEL_ISR )
-		printk("%s(%d):synclinkmp_interrupt(%d)exit.\n",
-			__FILE__,__LINE__,irq);
+		printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n",
+			__FILE__, __LINE__, info->irq_level);
 	return IRQ_HANDLED;
 }
 
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 81503d94fecc..13a4bdd4e4d6 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -399,7 +399,7 @@ static irqreturn_t tis_int_probe(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static irqreturn_t tis_int_handler(int irq, void *dev_id)
+static irqreturn_t tis_int_handler(int dummy, void *dev_id)
 {
 	struct tpm_chip *chip = dev_id;
 	u32 interrupt;