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authorJan Glauber <jang@linux.vnet.ibm.com>2008-12-25 13:38:47 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-12-25 13:38:59 +0100
commit50f769df1c4bea766c4eb927eae35728fb93e305 (patch)
treec86228e6965de0ea84bddc2104d7dfa339e2a187 /drivers/s390/cio/qdio_thinint.c
parent[S390] qdio: rework debug feature logging (diff)
downloadlinux-50f769df1c4bea766c4eb927eae35728fb93e305.tar.xz
linux-50f769df1c4bea766c4eb927eae35728fb93e305.zip
[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.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index 47ee741d65b2..8e90e147b746 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 */