The function can return negative values in case of error.
Its result should be then tested for such case.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107

Signed-off-by: Andrzej Hajda <a.ha...@samsung.com>
---
 drivers/net/wireless/ath/ath9k/htc_drv_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c 
b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index a680a97..fe1fd1a 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -834,7 +834,7 @@ void ath9k_htc_ani_work(struct work_struct *work)
                if (longcal || shortcal)
                        common->ani.caldone =
                                ath9k_hw_calibrate(ah, ah->curchan,
-                                                  ah->rxchainmask, longcal);
+                                               ah->rxchainmask, longcal) > 0;
 
                ath9k_htc_ps_restore(priv);
        }
-- 
1.9.1

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