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2015-02-05xmalloc: Make xrealloc() arguments conform to realloc()Tobias Klauser1-8/+5
2015-02-05xmalloc: Remove unnecessary NULL check before realloc()Tobias Klauser1-5/+1
2014-06-25xmalloc: Add and use xcallocTobias Klauser1-0/+15
2013-06-12ioops: misc: add dup{,2}_or_die to ioopsDaniel Borkmann1-8/+0
2013-06-04xutils: eliminate xutils, move rest to epoll2Daniel Borkmann1-1/+0
2013-06-04xutils: break out string handling and lockingDaniel Borkmann1-0/+1
2013-03-15all: import netsniff-ng 0.5.8-rc0 sourceDaniel Borkmann1-0/+151
> parent566cf877a1fcb6d6dc0126b076aad062054c2637 (diff)
irqdomain: Avoid activating interrupts more than once
Since commit f3b0946d629c ("genirq/msi: Make sure PCI MSIs are activated early"), we can end-up activating a PCI/MSI twice (once at allocation time, and once at startup time). This is normally of no consequences, except that there is some HW out there that may misbehave if activate is used more than once (the GICv3 ITS, for example, uses the activate callback to issue the MAPVI command, and the architecture spec says that "If there is an existing mapping for the EventID-DeviceID combination, behavior is UNPREDICTABLE"). While this could be worked around in each individual driver, it may make more sense to tackle the issue at the core level. In order to avoid getting in that situation, let's have a per-interrupt flag to remember if we have already activated that interrupt or not. Fixes: f3b0946d629c ("genirq/msi: Make sure PCI MSIs are activated early") Reported-and-tested-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1484668848-24361-1-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'net/mac80211/trace_msg.h')