linux-kernel - [PATCH v2] gpio: nuvoton: Fix sgpio irq handle error

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date: Mon, 29 Apr 2024 14:06:42 +0800
From: Jim Liu <jim.t90615@...il.com>
To: KWLIU@...oton.com,
	JJLIU0@...oton.com,
	linus.walleij@...aro.org,
	jim.t90615@...il.com,
	brgl@...ev.pl
Cc: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	openbmc@...ts.ozlabs.org
Subject: [PATCH v2] gpio: nuvoton: Fix sgpio irq handle error

User use gpiomon to monitor input pin ,if triger the system will call trace and rcu stall.

The irq_handler uses generic_handle_domain_irq, so there is need to remove irq_find_mapping.

Fixes: c4f8457d17ce ("gpio: nuvoton: Add Nuvoton NPCM sgpio driver")
Signed-off-by: Jim Liu <JJLIU0@...oton.com>
---
Changes for v2:
   - add more description
---
 drivers/gpio/gpio-npcm-sgpio.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/gpio/gpio-npcm-sgpio.c b/drivers/gpio/gpio-npcm-sgpio.c
index d31788b43abc..136838c25756 100644
--- a/drivers/gpio/gpio-npcm-sgpio.c
+++ b/drivers/gpio/gpio-npcm-sgpio.c
@@ -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);
-- 
2.25.1