Commit 9d13744b authored Sep 05, 2016 by Michael Chan Committed by David S. Miller Sep 06, 2016

bnxt_en: Fix TX push operation on ARM64.



There is a code path where we are calling __iowrite64_copy() on
an address that is not 64-bit aligned.  This causes an exception on
some architectures such as arm64.  Fix that code path by using
__iowrite32_copy().

Reported-by: JD Zheng <jiandong.zheng@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 5a56a0b3

drivers/net/ethernet/broadcom/bnxt/bnxt.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -353,8 +353,8 @@ static netdev_tx_t bnxt_start_xmit(struct sk_buff skb, struct net_device dev)
		push_len = (length + sizeof(*tx_push) + 7) / 8;
		if (push_len > 16) {
		__iowrite64_copy(txr->tx_doorbell, tx_push_buf, 16);
		__iowrite64_copy(txr->tx_doorbell + 4, tx_push_buf + 1,
		push_len - 16);
		__iowrite32_copy(txr->tx_doorbell + 4, tx_push_buf + 1,
		(push_len - 16) << 1);
		} else {
		__iowrite64_copy(txr->tx_doorbell, tx_push_buf,
		push_len);