diff options
Diffstat (limited to 'target/linux/lantiq/patches-4.19/0006-MIPS-lantiq-pass-struct-device-to-DMA-API-functions.patch')
| -rw-r--r-- | target/linux/lantiq/patches-4.19/0006-MIPS-lantiq-pass-struct-device-to-DMA-API-functions.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-4.19/0006-MIPS-lantiq-pass-struct-device-to-DMA-API-functions.patch b/target/linux/lantiq/patches-4.19/0006-MIPS-lantiq-pass-struct-device-to-DMA-API-functions.patch new file mode 100644 index 0000000000..412dd62050 --- /dev/null +++ b/target/linux/lantiq/patches-4.19/0006-MIPS-lantiq-pass-struct-device-to-DMA-API-functions.patch @@ -0,0 +1,50 @@ +From 74f03104ed465ff71b11076ef620e4eaa53dbf74 Mon Sep 17 00:00:00 2001 +From: Christoph Hellwig <hch@lst.de> +Date: Fri, 1 Feb 2019 09:47:44 +0100 +Subject: [PATCH] MIPS: lantiq: pass struct device to DMA API functions + +The DMA API generally relies on a struct device to work properly, and +only barely works without one for legacy reasons. Pass the easily +available struct device from the platform_device to remedy this. + +Also use GFP_KERNEL instead of GFP_ATOMIC as the gfp_t for the memory +allocation, as we aren't in interrupt context or under a lock. + +Note that this whole function looks somewhat bogus given that we never +even look at the returned dma address, and the CPHYSADDR magic on +a returned noncached mapping looks "interesting". But I'll leave +that to people more familiar with the code to sort out. + +Signed-off-by: Christoph Hellwig <hch@lst.de> +Signed-off-by: Paul Burton <paul.burton@mips.com> +Cc: John Crispin <john@phrozen.org> +Cc: Vinod Koul <vkoul@kernel.org> +Cc: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no> +Cc: Nicolas Ferre <nicolas.ferre@microchip.com> +Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com> +Cc: Felipe Balbi <balbi@kernel.org> +Cc: linux-mips@vger.kernel.org +Cc: linux-kernel@vger.kernel.org +Cc: dmaengine@vger.kernel.org +Cc: netdev@vger.kernel.org +Cc: linux-usb@vger.kernel.org +Cc: linux-fbdev@vger.kernel.org +Cc: alsa-devel@alsa-project.org +Cc: iommu@lists.linux-foundation.org +--- + arch/mips/lantiq/xway/vmmc.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +--- a/arch/mips/lantiq/xway/vmmc.c ++++ b/arch/mips/lantiq/xway/vmmc.c +@@ -31,8 +31,8 @@ static int vmmc_probe(struct platform_de + dma_addr_t dma; + + cp1_base = +- (void *) CPHYSADDR(dma_alloc_coherent(NULL, CP1_SIZE, +- &dma, GFP_ATOMIC)); ++ (void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE, ++ &dma, GFP_KERNEL)); + + gpio_count = of_gpio_count(pdev->dev.of_node); + while (gpio_count > 0) { |