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authorJan Glauber <jglauber@cavium.com>2018-04-09 17:45:52 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2018-04-21 00:58:35 +0800
commita40c88045506ecba8e3ae75da19e8a2c53e23a41 (patch)
tree5a8938ec0845cba8131a3e89e97d8e91fb255cef /drivers/crypto/cavium
parentc782a8c43e94ba6c09e9de2d69b5e3a5840ce61c (diff)
downloadlinux-a40c88045506ecba8e3ae75da19e8a2c53e23a41.tar.bz2
crypto: cavium - Prevent division by zero
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>
Diffstat (limited to 'drivers/crypto/cavium')
-rw-r--r--drivers/crypto/cavium/zip/zip_main.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/crypto/cavium/zip/zip_main.c b/drivers/crypto/cavium/zip/zip_main.c
index 1cd8aa488185..79b449e0f955 100644
--- a/drivers/crypto/cavium/zip/zip_main.c
+++ b/drivers/crypto/cavium/zip/zip_main.c
@@ -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"