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.
Cc: Michal Kazior <michal.kazior@xxxxxxxxx>
Signed-off-by: Rajkumar Manoharan <rmanohar@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/mac.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 75e0aeb..14a5944 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -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",
--
2.1.2
--
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