xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

irqdomain: Drop bogus fwspec-mapping error handling

Browse Source 
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: 1e2a7d7849 ("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>
This commit is contained in:
Johan Hovold
2023-02-13 11:42:45 +01:00
committed by Greg Kroah-Hartman
parent e0538aa7e0
commit 306c8b49b5
1 changed files with 1 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
kernel/irq/irqdomain.c
View File

@@ -837,13 +837,8 @@ 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);