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ath10k: wmi-alloc-chunk should use DMA_BIDIRECTIONAL 

These memory chunks are often used as 'swap' by the NIC,
so it will be both reading and writing to these areas.

This seems to fix errors like this on my x86-64 machine:

kernel: DMAR: DMAR:[DMA Write] Request device [05:00.0] fault addr ff5de000
        DMAR:[fault reason 05] PTE Write access is not set

Tested-by: Marek Behun <kabel@blackhole.sk>
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Ben Greear 2016-11-29 14:00:28 -08:00 committed by Kalle Valo
parent 9ec34a8619
commit 43ca92d380
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/ath/ath10k/wmi.c
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@ -4487,7 +4487,7 @@ static int ath10k_wmi_alloc_chunk(struct ath10k *ar, u32 req_id,
if (!num_units)
return -ENOMEM;
paddr = dma_map_single(ar->dev, vaddr, pool_size, DMA_TO_DEVICE);
paddr = dma_map_single(ar->dev, vaddr, pool_size, DMA_BIDIRECTIONAL);
if (dma_mapping_error(ar->dev, paddr)) {
kfree(vaddr);
return -ENOMEM;