From: Ben Greear Date: Tue, 29 Nov 2016 22:00:28 +0000 (-0800) Subject: ath10k: wmi-alloc-chunk should use DMA_BIDIRECTIONAL X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=43ca92d380a85996429601f0d337cbd58b4e5bf9;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Ben Greear Signed-off-by: Kalle Valo --- 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;