crypto: qat - silence a static checker warning

Add range check for ring number.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/crypto/qat/qat_common/adf_transport.c b/drivers/crypto/qat/qat_common/adf_transport.c
index d5d81985cd4b..3865ae8d96d9 100644
--- a/drivers/crypto/qat/qat_common/adf_transport.c
+++ b/drivers/crypto/qat/qat_common/adf_transport.c
@@ -264,6 +264,10 @@ int adf_create_ring(struct adf_accel_dev *accel_dev, const char *section,
                 dev_err(&GET_DEV(accel_dev), "Can't get ring number\n");
                 return -EFAULT;
         }
+        if (ring_num >= ADF_ETR_MAX_RINGS_PER_BANK) {
+                dev_err(&GET_DEV(accel_dev), "Invalid ring number\n");
+                return -EFAULT;
+        }
 
         bank = &transport_data->banks[bank_num];
         if (adf_reserve_ring(bank, ring_num)) {