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crypto: cavium - Prevent division by zero

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Avoid two potential divisions by zero when calculating average
values for the zip statistics.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Reviewed-by: Robert Richter <rrichter@cavium.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jan Glauber 2018-04-09 17:45:52 +02:00 committed by Herbert Xu
parent c782a8c43e
commit a40c880455
1 changed files with 5 additions and 4 deletions
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9
drivers/crypto/cavium/zip/zip_main.c
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@ -482,10 +482,11 @@ static int zip_show_stats(struct seq_file *s, void *unused)
atomic64_add(val, &st->pending_req);
}
avg_chunk = (atomic64_read(&st->comp_in_bytes) /
atomic64_read(&st->comp_req_complete));
avg_cr = (atomic64_read(&st->comp_in_bytes) /
atomic64_read(&st->comp_out_bytes));
val = atomic64_read(&st->comp_req_complete);
avg_chunk = (val) ? atomic64_read(&st->comp_in_bytes) / val : 0;
val = atomic64_read(&st->comp_out_bytes);
avg_cr = (val) ? atomic64_read(&st->comp_in_bytes) / val : 0;
seq_printf(s, " ZIP Device %d Stats\n"
"-----------------------------------\n"
"Comp Req Submitted : \t%lld\n"