iwlwifi: mvm: handle possible BIOS bug

In iwl_mvm_sar_get_ewrd_table() In case of a BIOS bug, n_profiles
might be 0 thus we need to return an error value.  Found by Klocwork.

Signed-off-by: Sharon Dvir <sharon.dvir@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
index b5c7dffafdc1a4ae1ac040f8394a526e2a9d9925..e6c9528eeedac795ddf41e330470969ec2ecd142 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -1201,6 +1201,12 @@ static int iwl_mvm_sar_get_ewrd_table(struct iwl_mvm *mvm)
        enabled = !!(wifi_pkg->package.elements[1].integer.value);
        n_profiles = wifi_pkg->package.elements[2].integer.value;
 
+       /* in case of BIOS bug */
+       if (n_profiles <= 0) {
+               ret = -EINVAL;
+               goto out_free;
+       }
+
        for (i = 0; i < n_profiles; i++) {
                /* the tables start at element 3 */
                static int pos = 3;