[git patches] minor irq handler cleanups

From: Jeff Garzik
Date: Sun Apr 20 2008 - 21:36:13 EST


In my review of every single interrupt handler in the Linux, while
working on another project (jgarzik/misc-2.6.git#irq-remove), I've
created quite a few minor cleanups and corrections to the various
interrupt handlers that need it.

Since the #irq-remove project involves removal of the 'irq' argument
from interrupt handlers (unused 99.8% of the time), I have been
explicitly noting the unused aspect of a handler's first argument
via s/irq/dummy/ naming changes to the function declaration.

Here are the bits that have either been ack'd explicitly (~60%), or are
straightforward and unlikely to create conflicts (of either the human or
patch(1) kind...).

Even if ultimately people dislike #irq-remove, these cleanups remain
useful, IMO.

Please pull from 'irq-cleanups-upstream' branch of
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6.git irq-cleanups-upstream

to receive the following updates:

arch/arm/mach-integrator/time.c | 2 +-
arch/blackfin/kernel/time.c | 5 ++---
arch/ppc/8xx_io/fec.c | 3 +--
arch/ppc/platforms/sbc82xx.c | 4 +++-
arch/sparc/kernel/time.c | 2 +-
drivers/char/mwave/tp3780i.c | 14 ++++++++++----
drivers/char/pcmcia/synclink_cs.c | 10 ++++------
drivers/char/specialix.c | 10 ++++------
drivers/char/stallion.c | 2 +-
drivers/char/synclink.c | 21 +++++++++------------
drivers/char/synclink_gt.c | 13 ++++---------
drivers/char/synclinkmp.c | 22 +++++++++-------------
drivers/char/tpm/tpm_tis.c | 2 +-
drivers/isdn/hisax/elsa.c | 4 ++--
drivers/isdn/hisax/elsa_ser.c | 4 ++--
drivers/isdn/hisax/hisax.h | 2 +-
include/asm-sparc/floppy.h | 2 +-
17 files changed, 56 insertions(+), 66 deletions(-)

Jeff Garzik (6):
ARM minor irq handler cleanup: avoid passing unused info to irq
[SPARC] minor irq handler cleanups
[BLACKFIN] minor irq handler cleanups
[PPC] minor irq handler cleanups
drivers/char: minor irq handler cleanups
[ISDN] minor irq handler cleanups

diff --git a/arch/arm/mach-integrator/time.c b/arch/arm/mach-integrator/time.c
index 5278f58..5235f64 100644
--- a/arch/arm/mach-integrator/time.c
+++ b/arch/arm/mach-integrator/time.c
@@ -125,7 +125,7 @@ static int rtc_probe(struct amba_device *dev, void *id)
xtime.tv_sec = __raw_readl(rtc_base + RTC_DR);

ret = request_irq(dev->irq[0], arm_rtc_interrupt, IRQF_DISABLED,
- "rtc-pl030", dev);
+ "rtc-pl030", NULL);
if (ret)
goto map_out;

diff --git a/arch/blackfin/kernel/time.c b/arch/blackfin/kernel/time.c
index 9bdc8f9..715b394 100644
--- a/arch/blackfin/kernel/time.c
+++ b/arch/blackfin/kernel/time.c
@@ -39,8 +39,7 @@
/* This is an NTP setting */
#define TICK_SIZE (tick_nsec / 1000)

-static void time_sched_init(irqreturn_t(*timer_routine)
- (int, void *));
+static void time_sched_init(irq_handler_t timer_routine);
static unsigned long gettimeoffset(void);

static struct irqaction bfin_timer_irq = {
@@ -64,7 +63,7 @@ static struct irqaction bfin_timer_irq = {
#define TIME_SCALE 1

static void
-time_sched_init(irqreturn_t(*timer_routine) (int, void *))
+time_sched_init(irq_handler_t timer_routine)
{
u32 tcount;

diff --git a/arch/ppc/8xx_io/fec.c b/arch/ppc/8xx_io/fec.c
index 11b0aa6..d7b7ba9 100644
--- a/arch/ppc/8xx_io/fec.c
+++ b/arch/ppc/8xx_io/fec.c
@@ -199,7 +199,6 @@ static int fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev);
#ifdef CONFIG_USE_MDIO
static void fec_enet_mii(struct net_device *dev);
#endif /* CONFIG_USE_MDIO */
-static irqreturn_t fec_enet_interrupt(int irq, void * dev_id);
#ifdef CONFIG_FEC_PACKETHOOK
static void fec_enet_tx(struct net_device *dev, __u32 regval);
static void fec_enet_rx(struct net_device *dev, __u32 regval);
@@ -472,7 +471,7 @@ fec_timeout(struct net_device *dev)
* This is called from the MPC core interrupt.
*/
static irqreturn_t
-fec_enet_interrupt(int irq, void * dev_id)
+fec_enet_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
volatile fec_t *fecp;
diff --git a/arch/ppc/platforms/sbc82xx.c b/arch/ppc/platforms/sbc82xx.c
index cc0935c..0df6aac 100644
--- a/arch/ppc/platforms/sbc82xx.c
+++ b/arch/ppc/platforms/sbc82xx.c
@@ -121,8 +121,10 @@ struct hw_interrupt_type sbc82xx_i8259_ic = {
.end = sbc82xx_i8259_end_irq,
};

-static irqreturn_t sbc82xx_i8259_demux(int irq, void *dev_id)
+static irqreturn_t sbc82xx_i8259_demux(int dummy, void *dev_id)
{
+ int irq;
+
spin_lock(&sbc82xx_i8259_lock);

sbc82xx_i8259_map[0] = 0x0c; /* OCW3: Read IR register on RD# pulse */
diff --git a/arch/sparc/kernel/time.c b/arch/sparc/kernel/time.c
index cfaf22c..53caacb 100644
--- a/arch/sparc/kernel/time.c
+++ b/arch/sparc/kernel/time.c
@@ -105,7 +105,7 @@ __volatile__ unsigned int *master_l10_limit;

#define TICK_SIZE (tick_nsec / 1000)

-irqreturn_t timer_interrupt(int irq, void *dev_id)
+static irqreturn_t timer_interrupt(int dummy, void *dev_id)
{
/* last time the cmos clock got updated */
static long last_rtc_update;
diff --git a/drivers/char/mwave/tp3780i.c b/drivers/char/mwave/tp3780i.c
index f282976..37fe80d 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 279ff50..4e84d23 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 5ff83df..4b5b5b7 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 feac54e..874aaa0 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 ddc74d1..a3237d4 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 1f954ac..3c89266 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 f3e7807..c96062e 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 81503d9..13a4bdd 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;
diff --git a/drivers/isdn/hisax/elsa.c b/drivers/isdn/hisax/elsa.c
index d272d8c..2c3691f 100644
--- a/drivers/isdn/hisax/elsa.c
+++ b/drivers/isdn/hisax/elsa.c
@@ -299,7 +299,7 @@ elsa_interrupt(int intno, void *dev_id)
val = serial_inp(cs, UART_IIR);
if (!(val & UART_IIR_NO_INT)) {
debugl1(cs,"IIR %02x", val);
- rs_interrupt_elsa(intno, cs);
+ rs_interrupt_elsa(cs);
}
}
#endif
@@ -379,7 +379,7 @@ elsa_interrupt_ipac(int intno, void *dev_id)
val = serial_inp(cs, UART_IIR);
if (!(val & UART_IIR_NO_INT)) {
debugl1(cs,"IIR %02x", val);
- rs_interrupt_elsa(intno, cs);
+ rs_interrupt_elsa(cs);
}
}
#endif
diff --git a/drivers/isdn/hisax/elsa_ser.c b/drivers/isdn/hisax/elsa_ser.c
index 1642dca..f181db4 100644
--- a/drivers/isdn/hisax/elsa_ser.c
+++ b/drivers/isdn/hisax/elsa_ser.c
@@ -384,13 +384,13 @@ static inline void transmit_chars(struct IsdnCardState *cs, int *intr_done)
}


-static void rs_interrupt_elsa(int irq, struct IsdnCardState *cs)
+static void rs_interrupt_elsa(struct IsdnCardState *cs)
{
int status, iir, msr;
int pass_counter = 0;

#ifdef SERIAL_DEBUG_INTR
- printk("rs_interrupt_single(%d)...", irq);
+ printk(KERN_DEBUG "rs_interrupt_single(%d)...", cs->irq);
#endif

do {
diff --git a/drivers/isdn/hisax/hisax.h b/drivers/isdn/hisax/hisax.h
index 34733c9..e8d429f 100644
--- a/drivers/isdn/hisax/hisax.h
+++ b/drivers/isdn/hisax/hisax.h
@@ -925,7 +925,7 @@ struct IsdnCardState {
int (*cardmsg) (struct IsdnCardState *, int, void *);
void (*setstack_d) (struct PStack *, struct IsdnCardState *);
void (*DC_Close) (struct IsdnCardState *);
- int (*irq_func) (int, void *);
+ irq_handler_t irq_func;
int (*auxcmd) (struct IsdnCardState *, isdn_ctrl *);
struct Channel channel[2+MAX_WAITING_CALLS];
struct BCState bcs[2+MAX_WAITING_CALLS];
diff --git a/include/asm-sparc/floppy.h b/include/asm-sparc/floppy.h
index dbe7a58..d3978e0 100644
--- a/include/asm-sparc/floppy.h
+++ b/include/asm-sparc/floppy.h
@@ -280,7 +280,7 @@ static inline void sun_fd_enable_dma(void)

/* Our low-level entry point in arch/sparc/kernel/entry.S */
extern int sparc_floppy_request_irq(int irq, unsigned long flags,
- irqreturn_t (*irq_handler)(int irq, void *));
+ irq_handler_t irq_handler);

static int sun_fd_request_irq(void)
{
--
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