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| author |   Julian Wiedmann <jwi@linux.ibm.com> | 2021-11-24 10:16:53 +0100 |
|---|---|---|
| committer |   Heiko Carstens <hca@linux.ibm.com> | 2021-12-06 14:42:26 +0100 |
| commit | e628f28793033ff760c82e04a73abe415b10a66c (patch) | |
| tree | 4c1bda3b5be9bcba4a0d1e09024316c595fceaaf /drivers/s390/cio | |
| parent | s390/pci: use physical addresses in DMA tables (diff) | |
| download | linux-dev-e628f28793033ff760c82e04a73abe415b10a66c.tar.xz linux-dev-e628f28793033ff760c82e04a73abe415b10a66c.zip | |
s390/qdio: remove unneeded sanity check in qdio_do_sqbs()
All callers of set_buf_states() are already making sure that 'count'
is not 0. So don't check it an additional time.
Note that our own code also doesn't _require_ the count to be sane
(ie. we can't overrun an array or similar). So worst case HW would
simply reject the SQBS operation and report an error.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/qdio_main.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index 82c2383b0740..9cde55730b65 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -170,8 +170,6 @@ static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start, int tmp_count = count, tmp_start = start; int nr = q->nr; - if (!count) - return 0; qperf_inc(q, sqbs); if (!q->is_input_q) |