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| author |   Julian Wiedmann <jwi@linux.ibm.com> | 2019-08-23 11:48:48 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-08-24 16:39:18 -0700 |
| commit | 313dc689b16c08b081939ee9b87dac3736c780e3 (patch) | |
| tree | 473f175b8e96dd7f404e10872d2353ce4e895838 /arch | |
| parent | s390/qdio: enable drivers to poll for Output completions (diff) | |
| download | linux-dev-313dc689b16c08b081939ee9b87dac3736c780e3.tar.xz linux-dev-313dc689b16c08b081939ee9b87dac3736c780e3.zip | |
s390/qdio: let drivers opt-out from Output Queue scanning
If a driver wants to use the new Output Queue poll code, then the qdio
layer must disable its internal Queue scanning. Let the driver select
this mode by passing a special scan_threshold of 0.
As the scan_threshold is the same for all Output Queues, also move it
into the main qdio_irq struct. This allows for fast opt-out checking, a
driver is expected to operate either _all_ or none of its Output Queues
in polling mode.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/asm/qdio.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h index 79b4a3e9dc5d..556d3e703fae 100644 --- a/arch/s390/include/asm/qdio.h +++ b/arch/s390/include/asm/qdio.h @@ -359,7 +359,7 @@ struct qdio_initialize { qdio_handler_t *output_handler; void (**queue_start_poll_array) (struct ccw_device *, int, unsigned long); - int scan_threshold; + unsigned int scan_threshold; unsigned long int_parm; struct qdio_buffer **input_sbal_addr_array; struct qdio_buffer **output_sbal_addr_array; |