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authorStefano Stabellini <sstabellini@kernel.org>2017-04-13 14:04:21 -0700
committerJuergen Gross <jgross@suse.com>2017-05-02 11:14:42 +0200
commite058632670b709145730a134acc3f83f392f7aa7 (patch)
treeabecc50c3223d577868dac099c72bfe0c3696c49 /include/xen
parent4a806016223c6df131280c82f1ed69c820b6a9ff (diff)
xen/arm,arm64: fix xen_dma_ops after 815dd18 "Consolidate get_dma_ops..."
The following commit: commit 815dd18788fe0d41899f51b91d0560279cf16b0d Author: Bart Van Assche <bart.vanassche@sandisk.com> Date: Fri Jan 20 13:04:04 2017 -0800 treewide: Consolidate get_dma_ops() implementations rearranges get_dma_ops in a way that xen_dma_ops are not returned when running on Xen anymore, dev->dma_ops is returned instead (see arch/arm/include/asm/dma-mapping.h:get_arch_dma_ops and include/linux/dma-mapping.h:get_dma_ops). Fix the problem by storing dev->dma_ops in dev_archdata, and setting dev->dma_ops to xen_dma_ops. This way, xen_dma_ops is returned naturally by get_dma_ops. The Xen code can retrieve the original dev->dma_ops from dev_archdata when needed. It also allows us to remove __generic_dma_ops from common headers. Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Tested-by: Julien Grall <julien.grall@arm.com> Suggested-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org> [4.11+] CC: linux@armlinux.org.uk CC: catalin.marinas@arm.com CC: will.deacon@arm.com CC: boris.ostrovsky@oracle.com CC: jgross@suse.com CC: Julien Grall <julien.grall@arm.com>
Diffstat (limited to 'include/xen')
-rw-r--r--include/xen/arm/page-coherent.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/xen/arm/page-coherent.h b/include/xen/arm/page-coherent.h
index 95ce6ac3a971..b0a2bfc8d647 100644
--- a/include/xen/arm/page-coherent.h
+++ b/include/xen/arm/page-coherent.h
@@ -2,8 +2,16 @@
#define _ASM_ARM_XEN_PAGE_COHERENT_H
#include <asm/page.h>
+#include <asm/dma-mapping.h>
#include <linux/dma-mapping.h>
+static inline const struct dma_map_ops *__generic_dma_ops(struct device *dev)
+{
+ if (dev && dev->archdata.dev_dma_ops)
+ return dev->archdata.dev_dma_ops;
+ return get_arch_dma_ops(NULL);
+}
+
void __xen_dma_map_page(struct device *hwdev, struct page *page,
dma_addr_t dev_addr, unsigned long offset, size_t size,
enum dma_data_direction dir, unsigned long attrs);