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| author | Julian Wiedmann <jwi@linux.ibm.com> | 2019-11-25 14:18:29 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2020-02-10 12:49:35 +0100 |
| commit | 0b6f499022b6a87d04f56edd2bf863ea76923206 (patch) | |
| tree | edae4fea767436a891a55f09442fb2e2fbcb0681 /drivers/s390/cio/qdio.h | |
| parent | fcd98d4002539f1e381916fc1b6648938c1eac76 (diff) | |
| download | linux-stable-0b6f499022b6a87d04f56edd2bf863ea76923206.tar.gz | |
s390/qdio: simplify ACK tracking
Current code uses a 'polling' flag to keep track of whether an Input
Queue has any ACKed SBALs. QEBSM devices might have multiple ACKed
SBALs, and those are tracked separately with 'ack_count'.
By also setting ack_count for non-QEBSM devices (to a fixed value of 1),
we can use 'ack_count != 0' as replacement for the polling flag.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/s390/cio/qdio.h')
| -rw-r--r-- | drivers/s390/cio/qdio.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h index 4b0798472643..ff74eb5fce50 100644 --- a/drivers/s390/cio/qdio.h +++ b/drivers/s390/cio/qdio.h @@ -182,11 +182,9 @@ enum qdio_queue_irq_states { }; struct qdio_input_q { - /* input buffer acknowledgement flag */ - int polling; /* first ACK'ed buffer */ int ack_start; - /* how much sbals are acknowledged with qebsm */ + /* how many SBALs are acknowledged */ int ack_count; /* last time of noticing incoming data */ u64 timestamp; |