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Re: [PATCH v2 3/3] xen/arm: handle irq_set_type() failures


  • To: Mykola Kvach <mykola_kvach@xxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Wed, 12 Aug 2026 09:39:55 +0200
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  • Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Roger Pau Monné <roger@xxxxxxxxxxxxxx>, Jens Wiklander <jenswi@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Wed, 12 Aug 2026 07:40:18 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 10.08.2026 20:38, Mykola Kvach wrote:
> --- a/xen/drivers/char/ns16550.c
> +++ b/xen/drivers/char/ns16550.c
> @@ -1928,6 +1928,7 @@ static int __init ns16550_acpi_uart_init(const void 
> *data)
>      struct acpi_table_header *table;
>      struct acpi_table_spcr *spcr;
>      acpi_status status;
> +    int rc;
>      /*
>       * Same as the DT part.
>       * Only support one UART on ARM which happen to be ns16550_com[0].
> @@ -1976,7 +1977,9 @@ static int __init ns16550_acpi_uart_init(const void 
> *data)
>      uart->reg_width = spcr->serial_port.access_width;
>  
>      /* The trigger/polarity information is not available in spcr. */
> -    irq_set_type(spcr->interrupt, IRQ_TYPE_LEVEL_HIGH);
> +    rc = irq_set_type(spcr->interrupt, IRQ_TYPE_LEVEL_HIGH);
> +    if ( rc )
> +        return rc;

Is erroring out still appropriate when part of ns16550_com[] was already
modified? I.e. doesn't the call need to move up then?

Jan



 


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