The interrupt level should be 0 or 1. The existing code was using the
interrupt flags to determine the level. In the only machine currently
supported (xlnx-versal-virt), the GICv3 was masking off all bits except
bit 0 when applying it, resulting in the IRQ never being delivered.

Signed-off-by: Doug Brown <doug@schmorgal.com>
---
 hw/net/can/xlnx-versal-canfd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/net/can/xlnx-versal-canfd.c b/hw/net/can/xlnx-versal-canfd.c
index 5f083c21e9..ad0c4da3c8 100644
--- a/hw/net/can/xlnx-versal-canfd.c
+++ b/hw/net/can/xlnx-versal-canfd.c
@@ -682,8 +682,8 @@ static uint8_t canfd_dlc_array[8] = {8, 12, 16, 20, 24, 32, 48, 64};
 
 static void canfd_update_irq(XlnxVersalCANFDState *s)
 {
-    unsigned int irq = s->regs[R_INTERRUPT_STATUS_REGISTER] &
-                        s->regs[R_INTERRUPT_ENABLE_REGISTER];
+    const bool irq = (s->regs[R_INTERRUPT_STATUS_REGISTER] &
+                      s->regs[R_INTERRUPT_ENABLE_REGISTER]) != 0;
     g_autofree char *path = object_get_canonical_path(OBJECT(s));
 
     /* RX watermark interrupts. */
-- 
2.34.1

On Fri, Aug 16, 2024 at 09:35:01AM -0700, Doug Brown wrote:
> The interrupt level should be 0 or 1. The existing code was using the
> interrupt flags to determine the level. In the only machine currently
> supported (xlnx-versal-virt), the GICv3 was masking off all bits except
> bit 0 when applying it, resulting in the IRQ never being delivered.
> 
> Signed-off-by: Doug Brown <doug@schmorgal.com>

Reviewed-by: Francisco Iglesias <francisco.iglesias@amd.com>

> ---
>  hw/net/can/xlnx-versal-canfd.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/net/can/xlnx-versal-canfd.c b/hw/net/can/xlnx-versal-canfd.c
> index 5f083c21e9..ad0c4da3c8 100644
> --- a/hw/net/can/xlnx-versal-canfd.c
> +++ b/hw/net/can/xlnx-versal-canfd.c
> @@ -682,8 +682,8 @@ static uint8_t canfd_dlc_array[8] = {8, 12, 16, 20, 24, 32, 48, 64};
>  
>  static void canfd_update_irq(XlnxVersalCANFDState *s)
>  {
> -    unsigned int irq = s->regs[R_INTERRUPT_STATUS_REGISTER] &
> -                        s->regs[R_INTERRUPT_ENABLE_REGISTER];
> +    const bool irq = (s->regs[R_INTERRUPT_STATUS_REGISTER] &
> +                      s->regs[R_INTERRUPT_ENABLE_REGISTER]) != 0;
>      g_autofree char *path = object_get_canonical_path(OBJECT(s));
>  
>      /* RX watermark interrupts. */
> -- 
> 2.34.1
>