leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[SCSI] aha152x: fix variable use before initialisation and other bugs

Browse Source 
- change interface of the reset functions from Scsi_Cmnd to Scsi_Host.
- add functions with the original interface and rename the new
  functions to reflect the new interface.
- call these from the pcmcia driver, thereby avoiding the need to
  construct a (broken) Scsi_Cmnd from a Scsi_Host.
- just run the bh if the interrupt is from the controller and if so
  ensure that it's only called once per interrupt.

Signed-off-by: Juergen E. Fischer <fischer@linux-buechse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Jrgen E. Fischer 2006-02-19 00:31:51 +01:00 committed by James Bottomley
parent 23ff51e9fe
commit e2482fa16e
3 changed files with 54 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
drivers/scsi/aha152x.c
View File

@ -1260,16 +1260,15 @@ static void free_hard_reset_SCs(struct Scsi_Host *shpnt, Scsi_Cmnd **SCs)
* Reset the bus
*
*/
static int aha152x_bus_reset(Scsi_Cmnd *SCpnt)
static int aha152x_bus_reset_host(struct Scsi_Host *shpnt)
{
struct Scsi_Host *shpnt = SCpnt->device->host;
unsigned long flags;
DO_LOCK(flags);
#if defined(AHA152X_DEBUG)
if(HOSTDATA(shpnt)->debug & debug_eh) {
printk(DEBUG_LEAD "aha152x_bus_reset(%p)", CMDINFO(SCpnt), SCpnt);
printk(KERN_DEBUG "scsi%d: bus reset", shpnt->host_no);
show_queues(shpnt);
}
#endif
@ -1277,14 +1276,14 @@ static int aha152x_bus_reset(Scsi_Cmnd *SCpnt)
free_hard_reset_SCs(shpnt, &ISSUE_SC);
free_hard_reset_SCs(shpnt, &DISCONNECTED_SC);
DPRINTK(debug_eh, DEBUG_LEAD "resetting bus\n", CMDINFO(SCpnt));
DPRINTK(debug_eh, KERN_DEBUG "scsi%d: resetting bus\n", shpnt->host_no);
SETPORT(SCSISEQ, SCSIRSTO);
mdelay(256);
SETPORT(SCSISEQ, 0);
mdelay(DELAY);
DPRINTK(debug_eh, DEBUG_LEAD "bus resetted\n", CMDINFO(SCpnt));
DPRINTK(debug_eh, KERN_DEBUG "scsi%d: bus resetted\n", shpnt->host_no);
setup_expected_interrupts(shpnt);
if(HOSTDATA(shpnt)->commands==0)
@ -1295,6 +1294,14 @@ static int aha152x_bus_reset(Scsi_Cmnd *SCpnt)
return SUCCESS;
}
/*
* Reset the bus
*
*/
static int aha152x_bus_reset(Scsi_Cmnd *SCpnt)
{
return aha152x_bus_reset_host(SCpnt->device->host);
}
/*
* Restore default values to the AIC-6260 registers and reset the fifos
@ -1337,22 +1344,27 @@ static void reset_ports(struct Scsi_Host *shpnt)
* Reset the host (bus and controller)
*
*/
int aha152x_host_reset(Scsi_Cmnd * SCpnt)
int aha152x_host_reset_host(struct Scsi_Host *shpnt)
{
#if defined(AHA152X_DEBUG)
struct Scsi_Host *shpnt = SCpnt->device->host;
#endif
DPRINTK(debug_eh, KERN_DEBUG "scsi%d: host reset\n", shpnt->host_no);
DPRINTK(debug_eh, DEBUG_LEAD "aha152x_host_reset(%p)\n", CMDINFO(SCpnt), SCpnt);
aha152x_bus_reset_host(shpnt);
aha152x_bus_reset(SCpnt);
DPRINTK(debug_eh, DEBUG_LEAD "resetting ports\n", CMDINFO(SCpnt));
reset_ports(SCpnt->device->host);
DPRINTK(debug_eh, KERN_DEBUG "scsi%d: resetting ports\n", shpnt->host_no);
reset_ports(shpnt);
return SUCCESS;
}
/*
* Reset the host (bus and controller)
*
*/
static int aha152x_host_reset(Scsi_Cmnd *SCpnt)
{
return aha152x_host_reset_host(SCpnt->device->host);
}
/*
* Return the "logical geometry"
*
@ -1431,22 +1443,18 @@ static void run(void)
{
int i;
for (i = 0; i<ARRAY_SIZE(aha152x_host); i++) {
struct Scsi_Host *shpnt = aha152x_host[i];
if (shpnt && HOSTDATA(shpnt)->service) {
HOSTDATA(shpnt)->service=0;
is_complete(shpnt);
}
is_complete(aha152x_host[i]);
}
}
/*
* Interrupts handler
* Interrupt handler
*
*/
static irqreturn_t intr(int irqno, void *dev_id, struct pt_regs *regs)
{
struct Scsi_Host *shpnt = lookup_irq(irqno);
unsigned long flags;
unsigned char rev, dmacntrl0;
if (!shpnt) {
@ -1472,23 +1480,23 @@ static irqreturn_t intr(int irqno, void *dev_id, struct pt_regs *regs)
if ((rev == 0xFF) && (dmacntrl0 == 0xFF))
return IRQ_NONE;
if( TESTLO(DMASTAT, INTSTAT) )
return IRQ_NONE;
/* no more interrupts from the controller, while we're busy.
INTEN is restored by the BH handler */
CLRBITS(DMACNTRL0, INTEN);
#if 0
/* check if there is already something to be
serviced; should not happen */
if(HOSTDATA(shpnt)->service) {
printk(KERN_ERR "aha152x%d: lost interrupt (%d)\n", HOSTNO, HOSTDATA(shpnt)->service);
show_queues(shpnt);
DO_LOCK(flags);
if( HOSTDATA(shpnt)->service==0 ) {
HOSTDATA(shpnt)->service=1;
/* Poke the BH handler */
INIT_WORK(&aha152x_tq, (void *) run, NULL);
schedule_work(&aha152x_tq);
}
#endif
/* Poke the BH handler */
HOSTDATA(shpnt)->service++;
INIT_WORK(&aha152x_tq, (void *) run, NULL);
schedule_work(&aha152x_tq);
DO_UNLOCK(flags);
return IRQ_HANDLED;
}
@ -2527,7 +2535,18 @@ static void is_complete(struct Scsi_Host *shpnt)
unsigned long flags;
int pending;
if(!shpnt)
return;
DO_LOCK(flags);
if( HOSTDATA(shpnt)->service==0 ) {
DO_UNLOCK(flags);
return;
}
HOSTDATA(shpnt)->service = 0;
if(HOSTDATA(shpnt)->in_intr) {
DO_UNLOCK(flags);
/* aha152x_error never returns.. */

2
drivers/scsi/aha152x.h
View File

@ -332,6 +332,6 @@ struct aha152x_setup {
struct Scsi_Host *aha152x_probe_one(struct aha152x_setup *);
void aha152x_release(struct Scsi_Host *);
int aha152x_host_reset(Scsi_Cmnd *);
int aha152x_host_reset_host(struct Scsi_Host *);
#endif /* _AHA152X_H */

4
drivers/scsi/pcmcia/aha152x_stub.c
View File

@ -275,10 +275,8 @@ static int aha152x_resume(struct pcmcia_device *dev)
link->state &= ~DEV_SUSPEND;
if (link->state & DEV_CONFIG) {
Scsi_Cmnd tmp;
pcmcia_request_configuration(link->handle, &link->conf);
tmp.device->host = info->host;
aha152x_host_reset(&tmp);
aha152x_host_reset_host(info->host);
}
return 0;