[PATCH 1/2] staging: wfx: fix use of uninitialized pointer

Jerome Pouiller Jerome.Pouiller at silabs.com
Mon Oct 19 16:06:03 UTC 2020


From: Jérôme Pouiller <jerome.pouiller at silabs.com>

With -Wuninitialized, the compiler complains:

drivers/staging/wfx/data_tx.c:34:19: warning: variable 'band' is uninitialized when used here [-Wuninitialized]
    if (rate->idx >= band->n_bitrates) {
                         ^~~~

Reported-by: kernel test robot <lkp at intel.com>
Reported-by: Nathan Chancellor <natechancellor at gmail.com>
Fixes: 868fd970e187 ("staging: wfx: improve robustness of wfx_get_hw_rate()")
Signed-off-by: Jérôme Pouiller <jerome.pouiller at silabs.com>
---
 drivers/staging/wfx/data_tx.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/wfx/data_tx.c b/drivers/staging/wfx/data_tx.c
index 41f6a604a697..36b36ef39d05 100644
--- a/drivers/staging/wfx/data_tx.c
+++ b/drivers/staging/wfx/data_tx.c
@@ -31,13 +31,13 @@ static int wfx_get_hw_rate(struct wfx_dev *wdev,
 		}
 		return rate->idx + 14;
 	}
-	if (rate->idx >= band->n_bitrates) {
-		WARN(1, "wrong rate->idx value: %d", rate->idx);
-		return -1;
-	}
 	// WFx only support 2GHz, else band information should be retrieved
 	// from ieee80211_tx_info
 	band = wdev->hw->wiphy->bands[NL80211_BAND_2GHZ];
+	if (rate->idx >= band->n_bitrates) {
+		WARN(1, "wrong rate->idx value: %d", rate->idx);
+		return -1;
+	}
 	return band->bitrates[rate->idx].hw_value;
 }
 
-- 
2.28.0



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