linux-kernel - [irqchip: irq/irqchip-fixes] irqchip/stm32-exti: Remove check on always false condition

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Message-ID: <166307359696.401.1638589625214166673.tip-bot2@tip-bot2>
Date:   Tue, 13 Sep 2022 12:53:16 -0000
From:   "irqchip-bot for Antonio Borneo" <tip-bot2@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Antonio Borneo <antonio.borneo@...s.st.com>,
        Marc Zyngier <maz@...nel.org>, tglx@...utronix.de
Subject: [irqchip: irq/irqchip-fixes] irqchip/stm32-exti: Remove check on
 always false condition

The following commit has been merged into the irq/irqchip-fixes branch of irqchip:

Commit-ID:     8fc7a6198a80bc39b6c5b3cc1a578e7d24f068a2
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/8fc7a6198a80bc39b6c5b3cc1a578e7d24f068a2
Author:        Antonio Borneo <antonio.borneo@...s.st.com>
AuthorDate:    Wed, 17 Aug 2022 14:57:58 +02:00
Committer:     Marc Zyngier <maz@...nel.org>
CommitterDate: Mon, 12 Sep 2022 16:31:25 +01:00

irqchip/stm32-exti: Remove check on always false condition

The field drv_data is assigned during driver's probe, where it's
already checked to be not NULL.

Remove the always false check '!host_data->drv_data'.

This fixes a warning "variable dereferenced before check" detected
by '0-DAY CI Kernel Test Service'.

Fixes: c297493336b7 ("irqchip/stm32-exti: Simplify irq description table")
Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Link: https://lore.kernel.org/lkml/202208131739.gJvcs9ls-lkp@intel.com/
Signed-off-by: Antonio Borneo <antonio.borneo@...s.st.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20220817125758.5975-1-antonio.borneo@foss.st.com
---
 drivers/irqchip/irq-stm32-exti.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index a73763d..6a3f749 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -716,7 +716,7 @@ static int stm32_exti_h_domain_alloc(struct irq_domain *dm,
 
 	irq_domain_set_hwirq_and_chip(dm, virq, hwirq, chip, chip_data);
 
-	if (!host_data->drv_data || !host_data->drv_data->desc_irqs)
+	if (!host_data->drv_data->desc_irqs)
 		return -EINVAL;
 
 	desc_irq = host_data->drv_data->desc_irqs[hwirq];