From: Dan Aloni <dan@kernelim.com>
Date: Fri, 2 Oct 2020 22:33:43 +0300
Subject: [PATCH] svcrdma: fix bounce buffers for unaligned offsets and
multiple pages
Git-commit: c327a310ec4d6ecbea13185ed56c11def441d9ab
Patch-mainline: v5.10-rc1
References: git-fixes
This was discovered using O_DIRECT at the client side, with small
unaligned file offsets or IOs that span multiple file pages.
Fixes: e248aa7be86 ("svcrdma: Remove max_sge check at connect time")
Signed-off-by: Dan Aloni <dan@kernelim.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: NeilBrown <neilb@suse.com>
---
net/sunrpc/xprtrdma/svc_rdma_sendto.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -613,10 +613,11 @@ static int svc_rdma_pull_up_reply_msg(st
while (remaining) {
len = min_t(u32, PAGE_SIZE - pageoff, remaining);
- memcpy(dst, page_address(*ppages), len);
+ memcpy(dst, page_address(*ppages) + pageoff, len);
remaining -= len;
dst += len;
pageoff = 0;
+ ppages++;
}
}