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authorIvan Khoronzhuk <ivan.khoronzhuk@linaro.org>2019-08-08 12:38:03 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2019-08-09 19:02:19 +0300
commitd9973cec9d578b381235bb872a2d378c69c54915 (patch)
tree312f4730e73ac572f7884ae5729b6fc7d934308d /net/xdp
parentb707659213d3c70f2c704ec950df6263b4bffe84 (diff)
downloadlinux-d9973cec9d578b381235bb872a2d378c69c54915.tar.xz
xdp: xdp_umem: fix umem pages mapping for 32bits systems
Use kmap instead of page_address as it's not always in low memory. Acked-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net/xdp')
-rw-r--r--net/xdp/xdp_umem.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 83de74ca729a..a0607969f8c0 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -14,6 +14,7 @@
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/idr.h>
+#include <linux/highmem.h>
#include "xdp_umem.h"
#include "xsk_queue.h"
@@ -164,6 +165,14 @@ void xdp_umem_clear_dev(struct xdp_umem *umem)
umem->zc = false;
}
+static void xdp_umem_unmap_pages(struct xdp_umem *umem)
+{
+ unsigned int i;
+
+ for (i = 0; i < umem->npgs; i++)
+ kunmap(umem->pgs[i]);
+}
+
static void xdp_umem_unpin_pages(struct xdp_umem *umem)
{
unsigned int i;
@@ -207,6 +216,7 @@ static void xdp_umem_release(struct xdp_umem *umem)
xsk_reuseq_destroy(umem);
+ xdp_umem_unmap_pages(umem);
xdp_umem_unpin_pages(umem);
kfree(umem->pages);
@@ -369,7 +379,7 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
}
for (i = 0; i < umem->npgs; i++)
- umem->pages[i].addr = page_address(umem->pgs[i]);
+ umem->pages[i].addr = kmap(umem->pgs[i]);
return 0;