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Re: [PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat

From Andrew Lunn <andrew@lunn.ch>
Newsgroups linux.kernel
Subject Re: [PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat
Date 2015-10-21 18:20 +0200
Message-ID <qm4hm-8eF-41@gated-at.bofh.it> (permalink)
References <qm3EC-7ex-35@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Wed, Oct 21, 2015 at 05:37:45PM +0200, Neil Armstrong wrote:
> Like the change made for mv88e6xxx, use mutex_lock_nested() to avoid
> lockdep to give false positives because of nested MDIO busses.

Hi Neil

We now have three instances of this, since mdio-mux.c has the same
code. Maybe now would be a good time to refactor this code into
mdiobus_read_nested() and mdiobus_write_nested() in mdio_bus.c?  At
the same time, add BUG_ON(in_interrupt()) similar to the non-nested
versions?

	Andrew
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Thread

[PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat Neil Armstrong <narmstrong@baylibre.com> - 2015-10-21 17:40 +0200
  Re: [PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat Andrew Lunn <andrew@lunn.ch> - 2015-10-21 18:20 +0200
    Re: [PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat Neil Armstrong <narmstrong@baylibre.com> - 2015-10-22 09:40 +0200
    Re: [PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat Neil Armstrong <narmstrong@baylibre.com> - 2015-10-22 10:10 +0200
    Re: [PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat Neil Armstrong <narmstrong@baylibre.com> - 2015-10-22 10:10 +0200
      Re: [PATCH] net: dsa: mv88e6060: Fix false positive lockdep splat Andrew Lunn <andrew@lunn.ch> - 2015-10-22 14:10 +0200

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