linux-kernel - Re: [PATCH] arm pl011 serial: support multi-irq request

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-prev] [day] [month] [year] [list]

Message-ID: <YNmM518c49k9V3Hv@kroah.com>
Date:   Mon, 28 Jun 2021 10:48:39 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     bing fan <hptsfb@...il.com>
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm pl011 serial: support multi-irq request

On Mon, Jun 28, 2021 at 03:19:13PM +0800, bing fan wrote:
> From: Bing Fan <tombinfan@...cent.com>
> 
> In order to make pl011 work better, multiple interrupts are
> required, such as TXIM, RXIM, RTIM, error interrupt(FE/PE/BE/OE);
> at the same time, pl011 to GIC does not merge the interrupt
> lines(each serial-interrupt corresponding to different GIC hardware
> interrupt), so need to enable and request multiple gic interrupt
> numbers in the driver.
> 
> Signed-off-by: Bing Fan <hptsfb@...il.com>
> ---
>  drivers/tty/serial/amba-pl011.c | 23 ++++++++++++++++++++++-
>  1 file changed, 22 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
> index 78682c12156a..2b6f43c27dea 100644
> --- a/drivers/tty/serial/amba-pl011.c
> +++ b/drivers/tty/serial/amba-pl011.c
> @@ -1703,9 +1703,30 @@ static void pl011_write_lcr_h(struct
> uart_amba_port *uap, unsigned int lcr_h)
> 
>  static int pl011_allocate_irq(struct uart_amba_port *uap)
>  {
> +       int ret = -1;
> +       int i = 0;
> +       unsigned int virq = 0;
> +       struct amba_device *amba_dev = (struct amba_device *)uap->port.dev;
> +
> +       if (!amba_dev)
> +               return -1;
> +
>         pl011_write(uap->im, uap, REG_IMSC);
> 
> -       return request_irq(uap->port.irq, pl011_int, IRQF_SHARED,
> "uart-pl011", uap);
> +       for (i = 0; i < AMBA_NR_IRQS; i++) {
> +               virq = amba_dev->irq[i];
> +               if (virq == 0)          // request irq until virq is 0
> +                       break;
> +
> +               ret = request_irq(virq, pl011_int, IRQF_SHARED,
> "uart-pl011-*", uap);
> +               if (ret < 0) {
> +                       dev_info(uap->port.dev, "%s %d request %u
> interrupt failed\n",
> +                                       __func__, __LINE__, virq);
> +                       break;
> +               }
> +       }
> +
> +       return ret;
>  }
> 
>  /*
> -- 
> 2.17.1


Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
as indicated below:

- Your patch is malformed (tabs converted to spaces, linewrapped, etc.)
  and can not be applied.  Please read the file,
  Documentation/email-clients.txt in order to fix this.


If you wish to discuss this problem further, or you have questions about
how to resolve this issue, please feel free to respond to this email and
Greg will reply once he has dug out from the pending patches received
from other developers.

thanks,

greg k-h's patch email bot