tree 88b835bad4d0e8ac5445d57ed467173a1917bc64
parent 6783f50ed144aafe8c3aceb223db2c7956278a1f
author Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> 1530692090 +0300
committer David S. Miller <davem@davemloft.net> 1530927849 +0900

ravb: fix invalid context bug while calling auto-negotiation by ethtool

Since commit 35b5f6b1a82b ("PHYLIB: Locking fixes for PHY I/O
potentially sleeping") phy_start_aneg() function utilizes a mutex
to serialize changes to phy state, however the helper function is
called in atomic context.

The bug can be reproduced by running "ethtool -r" command, the bug
is reported if CONFIG_DEBUG_ATOMIC_SLEEP build option is enabled.

Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>