diff options
| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2008-12-25 13:38:47 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:38:59 +0100 |
| commit | 50f769df1c4bea766c4eb927eae35728fb93e305 (patch) | |
| tree | c86228e6965de0ea84bddc2104d7dfa339e2a187 /drivers/s390/cio/qdio_thinint.c | |
| parent | 22f9934767f49012ffbae753b28b8055bd28348f (diff) | |
| download | kernel_samsung_smdk4412-50f769df1c4bea766c4eb927eae35728fb93e305.zip kernel_samsung_smdk4412-50f769df1c4bea766c4eb927eae35728fb93e305.tar.gz kernel_samsung_smdk4412-50f769df1c4bea766c4eb927eae35728fb93e305.tar.bz2 | |
[S390] qdio: improve inbound buffer acknowledgement
- Use automatic acknowledgement of incoming buffers in QEBSM mode
- Move ACK for non-QEBSM mode always to the newest buffer to prevent
a race with qdio_stop_polling
- Remove the polling spinlock, the upper layer drivers return new buffers
in the same code path and could not run in parallel
- Don't flood the error log in case of no-target-buffer-empty
- In handle_inbound we check if we would overwrite an ACK'ed buffer, if so
advance the pointer to the oldest ACK'ed buffer so we don't overwrite an
empty buffer in qdio_stop_polling
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/qdio_thinint.c')
| -rw-r--r-- | drivers/s390/cio/qdio_thinint.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c index 47ee741..8e90e14 100644 --- a/drivers/s390/cio/qdio_thinint.c +++ b/drivers/s390/cio/qdio_thinint.c @@ -131,7 +131,7 @@ static inline int tiqdio_inbound_q_done(struct qdio_q *q) return 1; qdio_siga_sync_q(q); - get_buf_state(q, q->first_to_check, &state); + get_buf_state(q, q->first_to_check, &state, 0); if (state == SLSB_P_INPUT_PRIMED) /* more work coming */ |