Patch "gpio: nuvoton: Fix sgpio irq handle error" has been added to the 6.9-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    gpio: nuvoton: Fix sgpio irq handle error

to the 6.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     gpio-nuvoton-fix-sgpio-irq-handle-error.patch
and it can be found in the queue-6.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit b76f23ec13fc8fec6ff943328f25405dd16fccab
Author: Jim Liu <jim.t90615@xxxxxxxxx>
Date:   Mon May 6 14:42:44 2024 +0800

    gpio: nuvoton: Fix sgpio irq handle error
    
    [ Upstream commit 7f45fe2ea3b8c85787976293126a4a7133b107de ]
    
    The generic_handle_domain_irq() function calls irq_resolve_mapping().
    Thus delete a duplicative irq_find_mapping() call
    so that a stack trace and an RCU stall will be avoided.
    
    Fixes: c4f8457d17ce ("gpio: nuvoton: Add Nuvoton NPCM sgpio driver")
    Signed-off-by: Jim Liu <JJLIU0@xxxxxxxxxxx>
    Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
    Reviewed-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20240506064244.1645922-1-JJLIU0@xxxxxxxxxxx
    Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpio/gpio-npcm-sgpio.c b/drivers/gpio/gpio-npcm-sgpio.c
index d31788b43abcc..2605706145434 100644
--- a/drivers/gpio/gpio-npcm-sgpio.c
+++ b/drivers/gpio/gpio-npcm-sgpio.c
@@ -434,7 +434,7 @@ static void npcm_sgpio_irq_handler(struct irq_desc *desc)
 	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
 	struct irq_chip *ic = irq_desc_get_chip(desc);
 	struct npcm_sgpio *gpio = gpiochip_get_data(gc);
-	unsigned int i, j, girq;
+	unsigned int i, j;
 	unsigned long reg;
 
 	chained_irq_enter(ic, desc);
@@ -443,11 +443,9 @@ static void npcm_sgpio_irq_handler(struct irq_desc *desc)
 		const struct npcm_sgpio_bank *bank = &npcm_sgpio_banks[i];
 
 		reg = ioread8(bank_reg(gpio, bank, EVENT_STS));
-		for_each_set_bit(j, &reg, 8) {
-			girq = irq_find_mapping(gc->irq.domain,
-						i * 8 + gpio->nout_sgpio + j);
-			generic_handle_domain_irq(gc->irq.domain, girq);
-		}
+		for_each_set_bit(j, &reg, 8)
+			generic_handle_domain_irq(gc->irq.domain,
+						  i * 8 + gpio->nout_sgpio + j);
 	}
 
 	chained_irq_exit(ic, desc);