]> www.infradead.org Git - users/dwmw2/linux.git/commit
irqchip/gic-v3-its: Fix LPI release for Multi-MSI devices
authorMarc Zyngier <maz@kernel.org>
Thu, 5 Sep 2019 13:56:47 +0000 (14:56 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 5 Oct 2019 11:13:54 +0000 (13:13 +0200)
commit6e2056c4424cf006443bd26f3a208e851c0a6dc3
treed7a22b3a1983011770b7aae43ae34aba7f2d9da8
parent74a94a7e0a01bb678db17282dfecb13d56984de5
irqchip/gic-v3-its: Fix LPI release for Multi-MSI devices

[ Upstream commit c9c96e30ecaa0aafa225aa1a5392cb7db17c7a82 ]

When allocating a range of LPIs for a Multi-MSI capable device,
this allocation extended to the closest power of 2.

But on the release path, the interrupts are released one by
one. This results in not releasing the "extra" range, leaking
the its_device. Trying to reprobe the device will then fail.

Fix it by releasing the LPIs the same way we allocate them.

Fixes: 8208d1708b88 ("irqchip/gic-v3-its: Align PCI Multi-MSI allocation on their size")
Reported-by: Jiaxing Luo <luojiaxing@huawei.com>
Tested-by: John Garry <john.garry@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/f5e948aa-e32f-3f74-ae30-31fee06c2a74@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/irqchip/irq-gic-v3-its.c