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nfp: fix unaligned io read of capabilities word 

The address of 32-bit extend capability is not qword aligned,
and may cause exception in some arch.

Fixes: 484963ce9f ("nfp: extend capability and control words")
Signed-off-by: Huanhuan Wang <huanhuan.wang@corigine.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Huanhuan Wang 2022-12-16 15:31:01 +01:00 committed by David S. Miller
parent e0c8bccd40
commit 1b0c84a32e
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/netronome/nfp/nfp_net_common.c
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@ -2509,7 +2509,7 @@ static int nfp_net_read_caps(struct nfp_net *nn)
{ {
/* Get some of the read-only fields from the BAR */ /* Get some of the read-only fields from the BAR */
nn->cap = nn_readl(nn, NFP_NET_CFG_CAP); nn->cap = nn_readl(nn, NFP_NET_CFG_CAP);
nn->cap_w1 = nn_readq(nn, NFP_NET_CFG_CAP_WORD1); nn->cap_w1 = nn_readl(nn, NFP_NET_CFG_CAP_WORD1);
nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU); nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU);
/* ABI 4.x and ctrl vNIC always use chained metadata, in other cases /* ABI 4.x and ctrl vNIC always use chained metadata, in other cases