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[SCSI] aha152x, eata, u14-34f: minor irq handler cleanups

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- remove pointless casts from void*

- remove needless references to 'irq' function argument, when that
  information is already stored somewhere in a driver-private struct.

- where the 'irq' function argument is known never to be used, rename
  it to 'dummy' to make this more obvious

- remove always-false tests for dev_id==NULL

- remove always-true tests for 'irq == host_struct->irq'

- replace per-irq lookup functions and tables with a direct reference
  to data object obtained via 'dev_id' function argument, passed from
  request_irq()

This change's main purpose is to prepare for the patchset in
jgarzik/misc-2.6.git#irq-remove, that explores removal of the
never-used 'irq' argument in each interrupt handler.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Jeff Garzik 2008-04-18 19:22:52 -04:00 committed by James Bottomley
parent 8911c9e334
commit e19166d5df
3 changed files with 9 additions and 18 deletions
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7
drivers/scsi/aha152x.c
View file

@ -1432,15 +1432,10 @@ static void run(struct work_struct *work)
*/
static irqreturn_t intr(int irqno, void *dev_id)
{
struct Scsi_Host *shpnt = (struct Scsi_Host *)dev_id;
struct Scsi_Host *shpnt = dev_id;
unsigned long flags;
unsigned char rev, dmacntrl0;
if (!shpnt) {
printk(KERN_ERR "aha152x: catched interrupt %d for unknown controller.\n", irqno);
return IRQ_NONE;
}
/*
* Read a couple of registers that are known to not be all 1's. If
* we read all 1's (-1), that means that either:

11
drivers/scsi/eata.c
View file

@ -2286,17 +2286,14 @@ static void flush_dev(struct scsi_device *dev, unsigned long cursec,
}
}
static irqreturn_t ihdlr(int irq, struct Scsi_Host *shost)
static irqreturn_t ihdlr(struct Scsi_Host *shost)
{
struct scsi_cmnd *SCpnt;
unsigned int i, k, c, status, tstatus, reg;
struct mssp *spp;
struct mscp *cpp;
struct hostdata *ha = (struct hostdata *)shost->hostdata;
if (shost->irq != irq)
panic("%s: ihdlr, irq %d, shost->irq %d.\n", ha->board_name, irq,
shost->irq);
int irq = shost->irq;
/* Check if this board need to be serviced */
if (!(inb(shost->io_port + REG_AUX_STATUS) & IRQ_ASSERTED))
@ -2535,7 +2532,7 @@ static irqreturn_t ihdlr(int irq, struct Scsi_Host *shost)
return IRQ_NONE;
}
static irqreturn_t do_interrupt_handler(int irq, void *shap)
static irqreturn_t do_interrupt_handler(int dummy, void *shap)
{
struct Scsi_Host *shost;
unsigned int j;
@ -2548,7 +2545,7 @@ static irqreturn_t do_interrupt_handler(int irq, void *shap)
shost = sh[j];
spin_lock_irqsave(shost->host_lock, spin_flags);
ret = ihdlr(irq, shost);
ret = ihdlr(shost);
spin_unlock_irqrestore(shost->host_lock, spin_flags);
return ret;
}

9
drivers/scsi/u14-34f.c
View file

@ -1715,13 +1715,12 @@ static void flush_dev(struct scsi_device *dev, unsigned long cursec, unsigned in
}
static irqreturn_t ihdlr(int irq, unsigned int j) {
static irqreturn_t ihdlr(unsigned int j)
{
struct scsi_cmnd *SCpnt;
unsigned int i, k, c, status, tstatus, reg, ret;
struct mscp *spp, *cpp;
if (sh[j]->irq != irq)
panic("%s: ihdlr, irq %d, sh[j]->irq %d.\n", BN(j), irq, sh[j]->irq);
int irq = sh[j]->irq;
/* Check if this board need to be serviced */
if (!((reg = inb(sh[j]->io_port + REG_SYS_INTR)) & IRQ_ASSERTED)) goto none;
@ -1935,7 +1934,7 @@ static irqreturn_t do_interrupt_handler(int irq, void *shap) {
if ((j = (unsigned int)((char *)shap - sha)) >= num_boards) return IRQ_NONE;
spin_lock_irqsave(sh[j]->host_lock, spin_flags);
ret = ihdlr(irq, j);
ret = ihdlr(j);
spin_unlock_irqrestore(sh[j]->host_lock, spin_flags);
return ret;
}