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authorBen Hutchings <ben@decadent.org.uk>2010-09-06 18:28:56 -0700
committerDavid S. Miller <davem@davemloft.net>2010-09-07 13:57:22 -0700
commit89b12faba4f3441c9457c5278851e8a93ffd008d (patch)
treefa7af4864a3200a7abcadea2a04886515249d326 /net/irda
parent1ee89bd0fe72e381c8e4ef887d53c19c8adc6c93 (diff)
3c59x: Fix deadlock in vortex_error()
This fixes a bug introduced in commit de847272149365363a6043a963a6f42fb91566e2 "3c59x: Use fine-grained locks for MII and windowed register access". vortex_interrupt() holds vp->window_lock over multiple register accesses to reduce locking overhead. However it also needs to call vortex_error() sometimes, and that uses the regular functions for access to windowed registers, which will try to acquire window_lock again. Therefore, drop window_lock around the call to vortex_error() and set the window afterward reacquiring the lock. Since vortex_error() may call vortex_rx(), which *does* require its caller to hold window_lock, lift that call up into vortex_interrupt(). This also removes the potential for calling vortex_rx() on a later-generation NIC. Reported-and-tested-by: Jens Schüßler <jgs@trash.net> [in Debian's 2.6.32] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/irda')
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