target/linux/generic/backport-5.15/702-v5.19-17-net-ethernet-mtk_eth_soc-rely-on-GFP_KERNEL-for-dma_.patch

   1 From: Lorenzo Bianconi <lorenzo@kernel.org>
   2 Date: Fri, 20 May 2022 20:11:26 +0200
   3 Subject: [PATCH] net: ethernet: mtk_eth_soc: rely on GFP_KERNEL for
   4  dma_alloc_coherent whenever possible
   5
   6 Rely on GFP_KERNEL for dma descriptors mappings in mtk_tx_alloc(),
   7 mtk_rx_alloc() and mtk_init_fq_dma() since they are run in non-irq
   8 context.
   9
  10 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  11 Signed-off-by: David S. Miller <davem@davemloft.net>
  12 ---
  13
  14 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  15 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  16 @@ -846,7 +846,7 @@ static int mtk_init_fq_dma(struct mtk_et
  17         eth->scratch_ring = dma_alloc_coherent(eth->dma_dev,
  18                                                cnt * sizeof(struct mtk_tx_dma),
  19                                                &eth->phy_scratch_ring,
  20 -                                              GFP_ATOMIC);
  21 +                                              GFP_KERNEL);
  22         if (unlikely(!eth->scratch_ring))
  23                 return -ENOMEM;
  24
  25 @@ -1624,7 +1624,7 @@ static int mtk_tx_alloc(struct mtk_eth *
  26                 goto no_tx_mem;
  27
  28         ring->dma = dma_alloc_coherent(eth->dma_dev, MTK_DMA_SIZE * sz,
  29 -                                      &ring->phys, GFP_ATOMIC);
  30 +                                      &ring->phys, GFP_KERNEL);
  31         if (!ring->dma)
  32                 goto no_tx_mem;
  33
  34 @@ -1642,8 +1642,7 @@ static int mtk_tx_alloc(struct mtk_eth *
  35          */
  36         if (!MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
  37                 ring->dma_pdma = dma_alloc_coherent(eth->dma_dev, MTK_DMA_SIZE * sz,
  38 -                                                   &ring->phys_pdma,
  39 -                                                   GFP_ATOMIC);
  40 +                                                   &ring->phys_pdma, GFP_KERNEL);
  41                 if (!ring->dma_pdma)
  42                         goto no_tx_mem;
  43
  44 @@ -1758,7 +1757,7 @@ static int mtk_rx_alloc(struct mtk_eth *
  45
  46         ring->dma = dma_alloc_coherent(eth->dma_dev,
  47                                        rx_dma_size * sizeof(*ring->dma),
  48 -                                      &ring->phys, GFP_ATOMIC);
  49 +                                      &ring->phys, GFP_KERNEL);
  50         if (!ring->dma)
  51                 return -ENOMEM;
  52