s390/qdio: improve handling of PENDING buffers for QEBSM devices
For QEBSM devices the 'merge_pending' mechanism in get_buf_states() doesn't apply, and we can actually get SLSB_P_OUTPUT_PENDING returned. So for this case propagating the PENDING state to the driver via the queue's sbal_state doesn't make sense and creates unnecessary overhead. Instead introduce a new QDIO_ERROR_* flag that gets passed to the driver, and triggers the same processing as if the buffers were flagged as QDIO_OUTBUF_STATE_FLAG_PENDING. Signed-off-by:Julian Wiedmann <jwi@linux.ibm.com> Reviewed-by:
Benjamin Block <bblock@linux.ibm.com> Signed-off-by:
Vasily Gorbik <gor@linux.ibm.com>
parent
540936df
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