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| author |   Ben Greear <greearb@candelatech.com> | 2016-11-29 14:00:28 -0800 |
|---|---|---|
| committer |   Kalle Valo <kvalo@qca.qualcomm.com> | 2016-12-01 13:16:10 +0200 |
| commit | 43ca92d380a85996429601f0d337cbd58b4e5bf9 (patch) | |
| tree | 19ad249da7811348b2046d866413ff5334070130 | |
| parent | ath10k: fix Tx DMA alloc failure during continuous wifi down/up (diff) | |
| download | linux-dev-43ca92d380a85996429601f0d337cbd58b4e5bf9.tar.xz linux-dev-43ca92d380a85996429601f0d337cbd58b4e5bf9.zip | |
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>
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/wmi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c index 95be2ba311fc..c893314a191f 100644 --- a/drivers/net/wireless/ath/ath10k/wmi.c +++ b/drivers/net/wireless/ath/ath10k/wmi.c @@ -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; |