diff options
Diffstat (limited to 'package/kernel/mac80211/patches/330-ath10k-wmi-alloc-chunk-should-use-DMA_BIDIRECTIONAL.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/330-ath10k-wmi-alloc-chunk-should-use-DMA_BIDIRECTIONAL.patch | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/330-ath10k-wmi-alloc-chunk-should-use-DMA_BIDIRECTIONAL.patch b/package/kernel/mac80211/patches/330-ath10k-wmi-alloc-chunk-should-use-DMA_BIDIRECTIONAL.patch new file mode 100644 index 0000000000..4ac9bcd7d4 --- /dev/null +++ b/package/kernel/mac80211/patches/330-ath10k-wmi-alloc-chunk-should-use-DMA_BIDIRECTIONAL.patch @@ -0,0 +1,27 @@ +From: Ben Greear <greearb@candelatech.com> +Date: Tue, 29 Nov 2016 14:00:28 -0800 +Subject: [PATCH] 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> +--- + +--- a/drivers/net/wireless/ath/ath10k/wmi.c ++++ b/drivers/net/wireless/ath/ath10k/wmi.c +@@ -4495,7 +4495,7 @@ static int ath10k_wmi_alloc_chunk(struct + 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; |