crypto: iaa - Fix nr_cpus < nr_iaa case
If nr_cpus < nr_iaa, the calculated cpus_per_iaa will be 0, which
causes a divide-by-0 in rebalance_wq_table().
Make sure cpus_per_iaa is 1 in that case, and also in the nr_iaa == 0
case, even though cpus_per_iaa is never used if nr_iaa == 0, for
paranoia.
Cc: <stable@vger.kernel.org> # v6.8+
Reported-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/intel/iaa/iaa_crypto_main.c
index 1cd304d..b2191ad 100644
--- a/drivers/crypto/intel/iaa/iaa_crypto_main.c
+++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c
@@ -806,6 +806,8 @@
return -EINVAL;
cpus_per_iaa = (nr_nodes * nr_cpus_per_node) / nr_iaa;
+ if (!cpus_per_iaa)
+ cpus_per_iaa = 1;
out:
return 0;
}
@@ -821,10 +823,12 @@
}
}
- if (nr_iaa)
+ if (nr_iaa) {
cpus_per_iaa = (nr_nodes * nr_cpus_per_node) / nr_iaa;
- else
- cpus_per_iaa = 0;
+ if (!cpus_per_iaa)
+ cpus_per_iaa = 1;
+ } else
+ cpus_per_iaa = 1;
}
static int wq_table_add_wqs(int iaa, int cpu)
