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ath11k: Fix warning on variable 'sar' dereference before check 

We are seeing below warning:
warn: variable dereferenced before check 'sar'

Fix it by moving ahead pointer check on 'sar'.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3

Fixes: 652f69ed9c ("ath11k: Add support for SAR")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220517004844.2412660-1-quic_bqiang@quicinc.com
This commit is contained in:
Baochen Qiang 2022-05-17 08:48:44 +08:00 committed by Kalle Valo
parent 75a7062e53
commit 77bbbd5e0e
1 changed files with 6 additions and 7 deletions
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13
drivers/net/wireless/ath/ath11k/mac.c
View File

@ -8297,11 +8297,15 @@ static int ath11k_mac_op_set_bios_sar_specs(struct ieee80211_hw *hw,
const struct cfg80211_sar_specs *sar)
{
struct ath11k *ar = hw->priv;
const struct cfg80211_sar_sub_specs *sspec = sar->sub_specs;
const struct cfg80211_sar_sub_specs *sspec;
int ret, index;
u8 *sar_tbl;
u32 i;
if (!sar || sar->type != NL80211_SAR_TYPE_POWER ||
sar->num_sub_specs == 0)
return -EINVAL;
mutex_lock(&ar->conf_mutex);
if (!test_bit(WMI_TLV_SERVICE_BIOS_SAR_SUPPORT, ar->ab->wmi_ab.svc_map) ||
@ -8310,12 +8314,6 @@ static int ath11k_mac_op_set_bios_sar_specs(struct ieee80211_hw *hw,
goto exit;
}
if (!sar || sar->type != NL80211_SAR_TYPE_POWER ||
sar->num_sub_specs == 0) {
ret = -EINVAL;
goto exit;
}
ret = ath11k_wmi_pdev_set_bios_geo_table_param(ar);
if (ret) {
ath11k_warn(ar->ab, "failed to set geo table: %d\n", ret);
@ -8328,6 +8326,7 @@ static int ath11k_mac_op_set_bios_sar_specs(struct ieee80211_hw *hw,
goto exit;
}
sspec = sar->sub_specs;
for (i = 0; i < sar->num_sub_specs; i++) {
if (sspec->freq_range_index >= (BIOS_SAR_TABLE_LEN >> 1)) {
ath11k_warn(ar->ab, "Ignore bad frequency index %u, max allowed %u\n",