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| author | Julian Wiedmann <jwi@linux.ibm.com> | 2019-06-03 07:47:04 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-26 09:10:23 +0200 |
| commit | 95d0b4bff4d4e68a1dee15322af240dfb74f645f (patch) | |
| tree | 2db7da5b99c3bd85cab0ff5014b49152c29aaffe /drivers/s390/cio | |
| parent | 506c6ccedf71dad2a8637fb4599243513e1484a7 (diff) | |
| download | linux-stable-95d0b4bff4d4e68a1dee15322af240dfb74f645f.tar.gz linux-stable-95d0b4bff4d4e68a1dee15322af240dfb74f645f.tar.bz2 linux-stable-95d0b4bff4d4e68a1dee15322af240dfb74f645f.zip | |
s390/qdio: handle PENDING state for QEBSM devices
[ Upstream commit 04310324c6f482921c071444833e70fe861b73d9 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/s390/cio')
| -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); |