Merge "char: virtio_fastrpc: use DMA_ATTR_SKIP_CPU_SYNC for uncached buffer" (ae2d4a8f) · Commits · e / devices / android_kernel_xiaomi_sm6125

drivers/char/virtio_fastrpc.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		#include <linux/dma-buf.h>
		#include <linux/err.h>
		#include <linux/interrupt.h>
		#include <linux/ion.h>
		#include <linux/kernel.h>
		#include <linux/list.h>
		#include <linux/module.h>
		@@ -512,6 +513,7 @@ static int fastrpc_mmap_create(struct fastrpc_file *fl, int fd,
		struct fastrpc_apps *me = &gfa;
		struct fastrpc_mmap *map = NULL;
		int err = 0, sgl_index = 0;
		unsigned long flags;
		struct scatterlist *sgl = NULL;

		map = kzalloc(sizeof(*map), GFP_KERNEL);
		@@ -535,12 +537,21 @@ static int fastrpc_mmap_create(struct fastrpc_file *fl, int fd,
		dev_err(me->dev, "can't get dma buf fd %d\n", fd);
		goto bail;
		}
		VERIFY(err, !dma_buf_get_flags(map->buf, &flags));
		if (err) {
		dev_err(me->dev, "can't get dma buf flags %d\n", fd);
		goto bail;
		}

		VERIFY(err, !IS_ERR_OR_NULL(map->attach =
		dma_buf_attach(map->buf, me->dev)));
		if (err) {
		dev_err(me->dev, "can't attach dma buf\n");
		goto bail;
		}

		if (!(flags & ION_FLAG_CACHED))
		map->attach->dma_map_attrs \|= DMA_ATTR_SKIP_CPU_SYNC;
		VERIFY(err, !IS_ERR_OR_NULL(map->table =
		dma_buf_map_attachment(map->attach,
		DMA_BIDIRECTIONAL)));