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bnxt_en: Fix TX push operation on ARM64.

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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>
This commit is contained in:
Michael Chan 2016-09-05 01:57:35 -04:00 committed by David S. Miller
parent 5a56a0b3a4
commit 9d13744bb7
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/broadcom/bnxt/bnxt.c
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@ -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);