diff mbox series

[1/3] irqchip: renesas-rzg2l: Fix logic to clear TINT interrupt source

Message ID 20230918122411.237635-2-biju.das.jz@bp.renesas.com (mailing list archive)
State Accepted
Delegated to: Geert Uytterhoeven
Headers show
Series Fix IRQ storm with GPIO interrupts | expand

Commit Message

Biju Das Sept. 18, 2023, 12:24 p.m. UTC 
The logic to clear the TINT interrupt source in rzg2l_irqc_irq_disable()
is wrong as the mask is correct only for LSB on the TSSR register.
This issue is found when testing with two TINT interrupt sources. So fix
the logic for all TINTs by using the macro TSSEL_SHIFT() to multiply
tssr_offset with 8.

Fixes: 3fed09559cd8 ("irqchip: Add RZ/G2L IA55 Interrupt Controller driver")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---
 drivers/irqchip/irq-renesas-rzg2l.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Geert Uytterhoeven Sept. 18, 2023, 12:38 p.m. UTC | #1 
On Mon, Sep 18, 2023 at 2:24 PM Biju Das <biju.das.jz@bp.renesas.com> wrote:
> The logic to clear the TINT interrupt source in rzg2l_irqc_irq_disable()
> is wrong as the mask is correct only for LSB on the TSSR register.
> This issue is found when testing with two TINT interrupt sources. So fix
> the logic for all TINTs by using the macro TSSEL_SHIFT() to multiply
> tssr_offset with 8.
>
> Fixes: 3fed09559cd8 ("irqchip: Add RZ/G2L IA55 Interrupt Controller driver")
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert
Claudiu Sept. 19, 2023, 5:56 a.m. UTC | #2 
On 18.09.2023 15:24, Biju Das wrote:
> The logic to clear the TINT interrupt source in rzg2l_irqc_irq_disable()
> is wrong as the mask is correct only for LSB on the TSSR register.
> This issue is found when testing with two TINT interrupt sources. So fix
> the logic for all TINTs by using the macro TSSEL_SHIFT() to multiply
> tssr_offset with 8.
> 
> Fixes: 3fed09559cd8 ("irqchip: Add RZ/G2L IA55 Interrupt Controller driver")
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

> ---
>  drivers/irqchip/irq-renesas-rzg2l.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/irqchip/irq-renesas-rzg2l.c b/drivers/irqchip/irq-renesas-rzg2l.c
> index 4bbfa2b0a4df..2cee5477be6b 100644
> --- a/drivers/irqchip/irq-renesas-rzg2l.c
> +++ b/drivers/irqchip/irq-renesas-rzg2l.c
> @@ -118,7 +118,7 @@ static void rzg2l_irqc_irq_disable(struct irq_data *d)
>  
>  		raw_spin_lock(&priv->lock);
>  		reg = readl_relaxed(priv->base + TSSR(tssr_index));
> -		reg &= ~(TSSEL_MASK << tssr_offset);
> +		reg &= ~(TSSEL_MASK << TSSEL_SHIFT(tssr_offset));
>  		writel_relaxed(reg, priv->base + TSSR(tssr_index));
>  		raw_spin_unlock(&priv->lock);
>  	}
diff mbox series

Patch

diff --git a/drivers/irqchip/irq-renesas-rzg2l.c b/drivers/irqchip/irq-renesas-rzg2l.c
index 4bbfa2b0a4df..2cee5477be6b 100644
--- a/drivers/irqchip/irq-renesas-rzg2l.c
+++ b/drivers/irqchip/irq-renesas-rzg2l.c
@@ -118,7 +118,7 @@  static void rzg2l_irqc_irq_disable(struct irq_data *d)
 
 		raw_spin_lock(&priv->lock);
 		reg = readl_relaxed(priv->base + TSSR(tssr_index));
-		reg &= ~(TSSEL_MASK << tssr_offset);
+		reg &= ~(TSSEL_MASK << TSSEL_SHIFT(tssr_offset));
 		writel_relaxed(reg, priv->base + TSSR(tssr_index));
 		raw_spin_unlock(&priv->lock);
 	}