qed: Fix possible race for the link state value.
[ Upstream commitpull/10/head58874c7b24
] There's a possible race where driver can read link status in mid-transition and see that virtual-link is up yet speed is 0. Since in this mid-transition we're guaranteed to see a mailbox from MFW soon, we can afford to treat this as link down. Fixes:cc875c2e
("qed: Add link support") Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com> Signed-off-by: Ariel Elior <ariel.elior@cavium.com> Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
77c65d5f40
commit
f4e284f1db
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@ -1182,6 +1182,7 @@ static void qed_mcp_handle_link_change(struct qed_hwfn *p_hwfn,
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break;
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default:
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p_link->speed = 0;
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p_link->link_up = 0;
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}
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if (p_link->link_up && p_link->speed)
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