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misc: microchip: pci1xxxx: Resolve kernel panic during GPIO IRQ handling

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BugLink: https://bugs.launchpad.net/bugs/2106770

commit 194f9f94a5169547d682e9bbcc5ae6d18a564735 upstream.

Resolve kernel panic caused by improper handling of IRQs while
accessing GPIO values. This is done by replacing generic_handle_irq with
handle_nested_irq.

Fixes: 1f4d8ae231 ("misc: microchip: pci1xxxx: Add gpio irq handler and irq helper functions irq_ack, irq_mask, irq_unmask and irq_set_type of irq_chip.")
Cc: stable <stable@kernel.org>
Signed-off-by: Rengarajan S <rengarajan.s@microchip.com>
Link: https://lore.kernel.org/r/20241205133626.1483499-2-rengarajan.s@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CVE-2024-57916
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Rengarajan S
2024-12-05 19:06:25 +05:30
committed by Mehmet Basaran
parent 56f1d2d783
commit 44fea94295
1 changed files with 1 additions and 1 deletions
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drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
+1 -1
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@@ -277,7 +277,7 @@ static irqreturn_t pci1xxxx_gpio_irq_handler(int irq, void *dev_id)
writel(BIT(bit), priv->reg_base + INTR_STATUS_OFFSET(gpiobank));
spin_unlock_irqrestore(&priv->lock, flags);
irq = irq_find_mapping(gc->irq.domain, (bit + (gpiobank * 32)));
generic_handle_irq(irq);
handle_nested_irq(irq);
}
}
spin_lock_irqsave(&priv->lock, flags);