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-rw-r--r--package/kernel/mac80211/patches/317-ath10k-stop-abusing-GFP_DMA.patch54
1 files changed, 54 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/317-ath10k-stop-abusing-GFP_DMA.patch b/package/kernel/mac80211/patches/317-ath10k-stop-abusing-GFP_DMA.patch
new file mode 100644
index 0000000000..a229a1306a
--- /dev/null
+++ b/package/kernel/mac80211/patches/317-ath10k-stop-abusing-GFP_DMA.patch
@@ -0,0 +1,54 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Tue, 24 Nov 2015 11:33:54 +0100
+Subject: [PATCH] ath10k: stop abusing GFP_DMA
+
+Allocations from the DMA zone were originally added for legacy ISA
+stuff, or PCI devices that have specific limitations in their DMA
+addressing capabilities. It has no place in ath10k, which can do
+full 32-bit DMA.
+
+Fixes memory allocation errors on some platforms.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
++++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
+@@ -536,7 +536,7 @@ int ath10k_htt_rx_alloc(struct ath10k_ht
+
+ size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
+
+- vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_DMA);
++ vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
+ if (!vaddr)
+ goto err_dma_ring;
+
+@@ -545,7 +545,7 @@ int ath10k_htt_rx_alloc(struct ath10k_ht
+
+ vaddr = dma_alloc_coherent(htt->ar->dev,
+ sizeof(*htt->rx_ring.alloc_idx.vaddr),
+- &paddr, GFP_DMA);
++ &paddr, GFP_KERNEL);
+ if (!vaddr)
+ goto err_dma_idx;
+
+--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
++++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
+@@ -111,7 +111,7 @@ int ath10k_htt_tx_alloc(struct ath10k_ht
+ size = htt->max_num_pending_tx * sizeof(struct ath10k_htt_txbuf);
+ htt->txbuf.vaddr = dma_alloc_coherent(ar->dev, size,
+ &htt->txbuf.paddr,
+- GFP_DMA);
++ GFP_KERNEL);
+ if (!htt->txbuf.vaddr) {
+ ath10k_err(ar, "failed to alloc tx buffer\n");
+ ret = -ENOMEM;
+@@ -124,7 +124,7 @@ int ath10k_htt_tx_alloc(struct ath10k_ht
+ size = htt->max_num_pending_tx * sizeof(struct htt_msdu_ext_desc);
+ htt->frag_desc.vaddr = dma_alloc_coherent(ar->dev, size,
+ &htt->frag_desc.paddr,
+- GFP_DMA);
++ GFP_KERNEL);
+ if (!htt->frag_desc.vaddr) {
+ ath10k_warn(ar, "failed to alloc fragment desc memory\n");
+ ret = -ENOMEM;