bnxt_en: Fix RTNL lock usage on bnxt_update_link().

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[ Upstream commit 0eaa24b971 ]

bnxt_update_link() is called from multiple code paths.  Most callers,
such as open, ethtool, already hold RTNL.  Only the caller bnxt_sp_task()
does not.  So it is a bug to take RTNL inside bnxt_update_link().

Fix it by removing the RTNL inside bnxt_update_link().  The function
now expects the caller to always hold RTNL.

In bnxt_sp_task(), call bnxt_rtnl_lock_sp() before calling
bnxt_update_link().  We also need to move the call to the end of
bnxt_sp_task() since it will be clearing the BNXT_STATE_IN_SP_TASK bit.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Michael Chan 2017-01-25 02:55:08 -05:00 • committed by Greg Kroah-Hartman

parent e89ffe41e9

commit 66deb40925

1 changed files with 18 additions and 19 deletions

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

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