Commit 55d29f20 authored by Marc Zyngier's avatar Marc Zyngier Committed by Khalid Elmously

irqchip/gic-v3-its: Fix LPI release for Multi-MSI devices

BugLink: https://bugs.launchpad.net/bugs/1848589

[ Upstream commit c9c96e30 ]

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: 8208d170 ("irqchip/gic-v3-its: Align PCI Multi-MSI allocation on their size")
Reported-by: default avatarJiaxing Luo <luojiaxing@huawei.com>
Tested-by: default avatarJohn Garry <john.garry@huawei.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/f5e948aa-e32f-3f74-ae30-31fee06c2a74@huawei.comSigned-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarConnor Kuehl <connor.kuehl@canonical.com>
Signed-off-by: default avatarKleber Sacilotto de Souza <kleber.souza@canonical.com>
parent 5f5f9f1e
......@@ -1371,14 +1371,13 @@ static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq,
struct its_device *its_dev = irq_data_get_irq_chip_data(d);
int i;
bitmap_release_region(its_dev->event_map.lpi_map,
its_get_event_id(irq_domain_get_irq_data(domain, virq)),
get_count_order(nr_irqs));
for (i = 0; i < nr_irqs; i++) {
struct irq_data *data = irq_domain_get_irq_data(domain,
virq + i);
u32 event = its_get_event_id(data);
/* Mark interrupt index as unused */
clear_bit(event, its_dev->event_map.lpi_map);
/* Nuke the entry in the domain */
irq_domain_reset_irq_data(data);
}
......
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