diff options
Diffstat (limited to 'drivers/s390/cio/cio.c')
| -rw-r--r-- | drivers/s390/cio/cio.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 41db3cc653f..23ffcc4768a 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -670,10 +670,14 @@ do_IRQ (struct pt_regs *regs) continue; } sch = (struct subchannel *)(unsigned long)tpi_info->intparm; - if (sch) - spin_lock(sch->lock); + if (!sch) { + /* Clear pending interrupt condition. */ + tsch(tpi_info->schid, irb); + continue; + } + spin_lock(sch->lock); /* Store interrupt response block to lowcore. */ - if (tsch (tpi_info->schid, irb) == 0 && sch) { + if (tsch(tpi_info->schid, irb) == 0) { /* Keep subchannel information word up to date. */ memcpy (&sch->schib.scsw, &irb->scsw, sizeof (irb->scsw)); @@ -681,8 +685,7 @@ do_IRQ (struct pt_regs *regs) if (sch->driver && sch->driver->irq) sch->driver->irq(sch); } - if (sch) - spin_unlock(sch->lock); + spin_unlock(sch->lock); /* * Are more interrupts pending? * If so, the tpi instruction will update the lowcore @@ -708,8 +711,9 @@ void *cio_get_console_priv(void) /* * busy wait for the next interrupt on the console */ -void -wait_cons_dev (void) +void wait_cons_dev(void) + __releases(console_subchannel.lock) + __acquires(console_subchannel.lock) { unsigned long cr6 __attribute__ ((aligned (8))); unsigned long save_cr6 __attribute__ ((aligned (8))); |