From: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Date: Wed, 24 Jun 2020 01:51:33 +0530
Subject: cxgb4: use unaligned conversion for fetching timestamp
Patch-mainline: v5.8-rc3
Git-commit: 589b1c9c166dce120e27b32a83a78f55464a7ef9
References: bsc#1046540 bsc#1046648

Use get_unaligned_be64() to fetch the timestamp needed for ns_to_ktime()
conversion.

Fixes following sparse warning:
sge.c:3282:43: warning: cast to restricted __be64

Fixes: a456950445a0 ("cxgb4: time stamping interface for PTP")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/chelsio/cxgb4/sge.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -2817,7 +2817,7 @@ static noinline int t4_systim_to_hwstamp
 
 	hwtstamps = skb_hwtstamps(skb);
 	memset(hwtstamps, 0, sizeof(*hwtstamps));
-	hwtstamps->hwtstamp = ns_to_ktime(be64_to_cpu(*((u64 *)data)));
+	hwtstamps->hwtstamp = ns_to_ktime(get_unaligned_be64(data));
 
 	return RX_PTP_PKT_SUC;
 }