diff options
Diffstat (limited to 'drivers/s390/cio/cio.c')
| -rw-r--r-- | drivers/s390/cio/cio.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index e8d331493fd..7835a714a40 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -415,6 +415,8 @@ cio_enable_subchannel (struct subchannel *sch, unsigned int isc) CIO_TRACE_EVENT (2, "ensch"); CIO_TRACE_EVENT (2, sch->dev.bus_id); + if (sch_is_pseudo_sch(sch)) + return -EINVAL; ccode = stsch (sch->schid, &sch->schib); if (ccode) return -ENODEV; @@ -462,6 +464,8 @@ cio_disable_subchannel (struct subchannel *sch) CIO_TRACE_EVENT (2, "dissch"); CIO_TRACE_EVENT (2, sch->dev.bus_id); + if (sch_is_pseudo_sch(sch)) + return 0; ccode = stsch (sch->schid, &sch->schib); if (ccode == 3) /* Not operational. */ return -ENODEV; @@ -496,7 +500,7 @@ cio_disable_subchannel (struct subchannel *sch) return ret; } -static int cio_create_sch_lock(struct subchannel *sch) +int cio_create_sch_lock(struct subchannel *sch) { sch->lock = kmalloc(sizeof(spinlock_t), GFP_KERNEL); if (!sch->lock) |