path: root/Documentation/s390
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authorJulian Wiedmann <>2019-06-03 07:47:04 +0200
committerHeiko Carstens <>2019-06-07 10:10:15 +0200
commit04310324c6f482921c071444833e70fe861b73d9 (patch)
tree65169fa16298fc9a2482fd3ab3f7264a47d5146f /Documentation/s390
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 <> Signed-off-by: Heiko Carstens <>
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