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ath10k: fix kernel panic while shutting down AP

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Based on GFP flag given to DMA coherent allocation, the behaviour of
dma_free_coherent is changed. This behavioural diffrence is noticeable
in ARM platform. If DMA memory is allocated with GFP_KERNEL, free
coherent can not be called inside spin lock. This is causing kernel
crash in ARM platforms. Fix this by changing GFP flag to atomic.

This is most likely a regression from commit 64badcb6d6 ("ath10k: workaround
fw beaconing bug").

Cc: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Rajkumar Manoharan 2014-10-10 17:38:27 +05:30 committed by Kalle Valo
parent 9b57f88f1e
commit 82d7aba715
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/ath/ath10k/mac.c
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@ -2839,7 +2839,7 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
arvif->beacon_buf = dma_zalloc_coherent(ar->dev,
IEEE80211_MAX_FRAME_LEN,
&arvif->beacon_paddr,
GFP_KERNEL);
GFP_ATOMIC);
if (!arvif->beacon_buf) {
ret = -ENOMEM;
ath10k_warn(ar, "failed to allocate beacon buffer: %d\n",