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| author | Johan Hovold <johan+linaro@kernel.org> | 2023-02-13 11:42:45 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-10 09:29:40 +0100 |
| commit | b1f10867a10b774d3a524056a48f318808fe469d (patch) | |
| tree | 231756b4444a4c127d3ff1d76c2ec4a710757840 /kernel | |
| parent | a9419361372175d7ad0102f61defec39690e2311 (diff) | |
| download | linux-b1f10867a10b774d3a524056a48f318808fe469d.tar.gz linux-b1f10867a10b774d3a524056a48f318808fe469d.tar.bz2 linux-b1f10867a10b774d3a524056a48f318808fe469d.zip | |
irqdomain: Drop bogus fwspec-mapping error handling
commit e3b7ab025e931accdc2c12acf9b75c6197f1c062 upstream.
In case a newly allocated IRQ ever ends up not having any associated
struct irq_data it would not even be possible to dispose the mapping.
Replace the bogus disposal with a WARN_ON().
This will also be used to fix a shared-interrupt mapping race, hence the
CC-stable tag.
Fixes: 1e2a7d78499e ("irqdomain: Don't set type when mapping an IRQ")
Cc: stable@vger.kernel.org # 4.8
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Tested-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230213104302.17307-4-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/irqdomain.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 1b5e9decd854..3d6a14efae62 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -853,13 +853,8 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec) } irq_data = irq_get_irq_data(virq); - if (!irq_data) { - if (irq_domain_is_hierarchy(domain)) - irq_domain_free_irqs(virq, 1); - else - irq_dispose_mapping(virq); + if (WARN_ON(!irq_data)) return 0; - } /* Store trigger type */ irqd_set_trigger_type(irq_data, type); |