LinuxKPI: pci: fix dma handle type in match function

dma_addr_t is a vm_paddr_t which is a uint of some width.  Rather than
passing pointers of it around pass the value.

Comparing the addresses of different storage for the same dma handle
(the actual bug here) will not work when passed to the devres match
function.

Sponsored by:	The FreeBSD Foundation
Fixes:		0a575891211ef ("implement dmam_free_coherent()")
MFC after:	3 days
Differential Revision: https://reviews.freebsd.org/D58285

1 files changed, 4 insertions, 4 deletions

diff --git a/sys/compat/linuxkpi/common/src/linux_pci.c b/sys/compat/linuxkpi/common/src/linux_pci.c
index 1622ecb8b8ff..a49254425b5d 100644
--- a/sys/compat/linuxkpi/common/src/linux_pci.c
+++ b/sys/compat/linuxkpi/common/src/linux_pci.c
@@ -1916,7 +1916,7 @@ linux_dma_alloc_coherent(struct device *dev, size_t size,
 
 struct lkpi_devres_dmam_coherent {
 	size_t size;
-	dma_addr_t *handle;
+	dma_addr_t handle;
 	void *mem;
 };
 
@@ -1926,7 +1926,7 @@ lkpi_dmam_free_coherent(struct device *dev, void *p)
 	struct lkpi_devres_dmam_coherent *dr;
 
 	dr = p;
-	dma_free_coherent(dev, dr->size, dr->mem, *dr->handle);
+	dma_free_coherent(dev, dr->size, dr->mem, dr->handle);
 }
 
 static int
@@ -1952,7 +1952,7 @@ linuxkpi_dmam_free_coherent(struct device *dev, size_t size,
 {
 	struct lkpi_devres_dmam_coherent match = {
 		.size		= size,
-		.handle		= &dma_handle,
+		.handle		= dma_handle,
 		.mem		= addr
 	};
 	int error;
@@ -1979,7 +1979,7 @@ linuxkpi_dmam_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_ha
 
 	dr->size = size;
 	dr->mem = linux_dma_alloc_coherent(dev, size, dma_handle, flag);
-	dr->handle = dma_handle;
+	dr->handle = *dma_handle;
 	if (dr->mem == NULL) {
 		lkpi_devres_free(dr);
 		return (NULL);