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| author |   Julian Wiedmann <jwi@linux.ibm.com> | 2019-06-03 07:47:04 +0200 |
|---|---|---|
| committer |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2019-06-07 10:10:15 +0200 |
| commit | 04310324c6f482921c071444833e70fe861b73d9 (patch) | |
| tree | 65169fa16298fc9a2482fd3ab3f7264a47d5146f | |
| parent | s390/jump_label: remove unused structure definition (diff) | |
| download | linux-dev-04310324c6f482921c071444833e70fe861b73d9.tar.xz linux-dev-04310324c6f482921c071444833e70fe861b73d9.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/s390/cio/qdio_main.c | 1 |
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); |