diff options
| author | Stefano Stabellini <stefano.stabellini@xilinx.com> | 2020-07-10 15:34:18 -0700 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2020-08-04 07:43:17 +0200 |
| commit | ae4f0a17ee591c15efbee87746290d22aea81617 (patch) | |
| tree | aa0857113137569b7ada105b6b8ca785c19efcc6 /drivers/xen | |
| parent | 8b1e868f66076490189a36d984fcce286cdd6295 (diff) | |
| download | linux-ae4f0a17ee591c15efbee87746290d22aea81617.tar.bz2 | |
swiotlb-xen: remove start_dma_addr
It is not strictly needed. Call virt_to_phys on xen_io_tlb_start
instead. It will be useful not to have a start_dma_addr around with the
next patches.
Note that virt_to_phys is not the same as xen_virt_to_bus but actually
it is used to compared again __pa(xen_io_tlb_start) as passed to
swiotlb_init_with_tbl, so virt_to_phys is actually what we want.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Tested-by: Corey Minyard <cminyard@mvista.com>
Tested-by: Roman Shaposhnik <roman@zededa.com>
Link: https://lore.kernel.org/r/20200710223427.6897-2-sstabellini@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/swiotlb-xen.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 5fbadd07819b..89a775948a02 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -52,8 +52,6 @@ static unsigned long xen_io_tlb_nslabs; * Quick lookup value of the bus address of the IOTLB. */ -static u64 start_dma_addr; - /* * Both of these functions should avoid XEN_PFN_PHYS because phys_addr_t * can be 32bit when dma_addr_t is 64bit leading to a loss in @@ -241,7 +239,6 @@ retry: m_ret = XEN_SWIOTLB_EFIXUP; goto error; } - start_dma_addr = xen_virt_to_bus(xen_io_tlb_start); if (early) { if (swiotlb_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs, verbose)) @@ -392,8 +389,8 @@ static dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, */ trace_swiotlb_bounced(dev, dev_addr, size, swiotlb_force); - map = swiotlb_tbl_map_single(dev, start_dma_addr, phys, - size, size, dir, attrs); + map = swiotlb_tbl_map_single(dev, virt_to_phys(xen_io_tlb_start), + phys, size, size, dir, attrs); if (map == (phys_addr_t)DMA_MAPPING_ERROR) return DMA_MAPPING_ERROR; |