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authorJan Glauber <jang@linux.vnet.ibm.com>2009-06-12 12:26:28 +0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-06-12 12:27:32 +0400
commit4c57542320e73b9ff46b04092273dbcc184a4fb6 (patch)
tree981cca8580a6cd0447f38525fef1a84a4bb7dfd4 /drivers
parente45efa99b0b0035a2afc192c242e37eec5477497 (diff)
downloadlinux-4c57542320e73b9ff46b04092273dbcc184a4fb6.tar.xz
[S390] qdio: simplify error handling in irq handler
The check for the device status in qdio_establish_handle_irq() had dead code. Remove the unused code and simplify the error handling. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/s390/cio/qdio_main.c44
1 files changed, 12 insertions, 32 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index accd957454e7..ba4facc37011 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -881,42 +881,26 @@ no_handler:
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
}
-static int qdio_establish_check_errors(struct ccw_device *cdev, int cstat,
- int dstat)
+static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat,
+ int dstat)
{
struct qdio_irq *irq_ptr = cdev->private->qdio_data;
- if (cstat || (dstat & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END))) {
- DBF_ERROR("EQ:ck con");
- goto error;
- }
+ DBF_DEV_EVENT(DBF_INFO, irq_ptr, "qest irq");
- if (!(dstat & DEV_STAT_DEV_END)) {
- DBF_ERROR("EQ:no dev");
+ if (cstat)
goto error;
- }
-
- if (dstat & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) {
- DBF_ERROR("EQ: bad io");
+ if (dstat & ~(DEV_STAT_DEV_END | DEV_STAT_CHN_END))
goto error;
- }
- return 0;
+ if (!(dstat & DEV_STAT_DEV_END))
+ goto error;
+ qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED);
+ return;
+
error:
DBF_ERROR("%4x EQ:error", irq_ptr->schid.sch_no);
DBF_ERROR("ds: %2x cs:%2x", dstat, cstat);
-
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
- return 1;
-}
-
-static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat,
- int dstat)
-{
- struct qdio_irq *irq_ptr = cdev->private->qdio_data;
-
- DBF_DEV_EVENT(DBF_INFO, irq_ptr, "qest irq");
- if (!qdio_establish_check_errors(cdev, cstat, dstat))
- qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED);
}
/* qdio interrupt handler */
@@ -946,7 +930,6 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
}
}
qdio_irq_check_sense(irq_ptr, irb);
-
cstat = irb->scsw.cmd.cstat;
dstat = irb->scsw.cmd.dstat;
@@ -954,22 +937,19 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
case QDIO_IRQ_STATE_INACTIVE:
qdio_establish_handle_irq(cdev, cstat, dstat);
break;
-
case QDIO_IRQ_STATE_CLEANUP:
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
break;
-
case QDIO_IRQ_STATE_ESTABLISHED:
case QDIO_IRQ_STATE_ACTIVE:
if (cstat & SCHN_STAT_PCI) {
qdio_int_handler_pci(irq_ptr);
return;
}
- if ((cstat & ~SCHN_STAT_PCI) || dstat) {
+ if (cstat || dstat)
qdio_handle_activate_check(cdev, intparm, cstat,
dstat);
- break;
- }
+ break;
default:
WARN_ON(1);
}