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authorJulian Wiedmann <jwi@linux.ibm.com>2019-06-03 07:47:04 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2019-06-07 10:10:15 +0200
commit04310324c6f482921c071444833e70fe861b73d9 (patch)
tree65169fa16298fc9a2482fd3ab3f7264a47d5146f
parent6887560c039f13c21d7fa6df363c4db0f3e12fa2 (diff)
s390/qdio: handle PENDING state for QEBSM devices
When a CQ-enabled device uses QEBSM for SBAL state inspection, get_buf_states() can return the PENDING state for an Output Queue. get_outbound_buffer_frontier() isn't prepared for this, and any PENDING buffer will permanently stall all further completion processing on this Queue. This isn't a concern for non-QEBSM devices, as get_buf_states() for such devices will manually turn PENDING buffers into EMPTY ones. Fixes: 104ea556ee7f ("qdio: support asynchronous delivery of storage blocks") Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
-rw-r--r--drivers/s390/cio/qdio_main.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 7b7620de2acd..730c4e68094b 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -736,6 +736,7 @@ static int get_outbound_buffer_frontier(struct qdio_q *q, unsigned int start)
switch (state) {
case SLSB_P_OUTPUT_EMPTY:
+ case SLSB_P_OUTPUT_PENDING:
/* the adapter got it */
DBF_DEV_EVENT(DBF_INFO, q->irq_ptr,
"out empty:%1d %02x", q->nr, count);