From: Tadeusz Struk <tadeusz.struk@intel.com>
Date: Sat, 22 Aug 2015 15:29:30 +0000 (-0700)
Subject: crypto: qat - silence a static checker warning
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=55e8dba1acc2e3e9d77226c3b08b25a02a0e3a3a;p=linux-beck.git

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>
---

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)) {