linux-kernel - Re: Add UPF_FIXED_TYPE flag - eedacbf02df462d6c915d8d642b23fb450d485c7

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Message-ID: <4B0BA234.6020905@monstr.eu>
Date:	Tue, 24 Nov 2009 10:07:00 +0100
From:	Michal Simek <monstr@...str.eu>
To:	unlisted-recipients:; (no To-header on input)
CC:	benh@...nel.crashing.org, dmitchell@...c.com,
	Grant Likely <grant.likely@...retlab.ca>,
	John Williams <john.williams@...alogix.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Add UPF_FIXED_TYPE flag - eedacbf02df462d6c915d8d642b23fb450d485c7

Hi,

I found where the problem was. We have uart16550a compatible device not 
only uart16550.
I will send patch for extension of compatible list.

Regards,
Michal

Michal Simek wrote:
> Hi Ben and David,
> 
> I have found one problem with input overrun. My problem is of course on 
> Microblaze with uart16550.
> 
> Here is the behavior - I just pressed left arrow.
> 
> ~ # fdasfdakjsdhfkajsdhfkjadklasdjfhajksdhfkahsdfjkahsdkjfhjkattyS0: 3 
> input overrun(s)
> [[DttyS0: 3 input overrun(s)
> [[[[[DDDahsdk[[[[D[DDjfhjka[D          [[[DttyS0: 6 input 
> overrun(s)jk[[D[D[[D[[
> [[[[D[Dsd[[Dhfkah[[[[DD[[DDsdfjk[[D[D[[[[D[[[D[Dsd[[Dhfkah[[[[DD[[DDsdfjk[[D[D[[ 
> 
> D[[[[DDDahsdk[[[[D[DDjfhjka[D
> -sh: 
> fdasfdakjsdhfkajsdhfkjadklasdjfhajk[[D[[[D[Dsd[[Dhfkah[[[[DD[[DDsdfjk[[D[D[[D[[[[DDDahsdk[[[[D[DDjfhjka[D: 
> not found
> 
> 
> I bisected it and yours Subject patch caused my problems. It is really 
> old patch and I was surprised how old it is.
> 
> 
> Here is your diff
> diff --git a/drivers/serial/of_serial.c b/drivers/serial/of_serial.c
> index 02406ba..54483cd 100644
> --- a/drivers/serial/of_serial.c
> +++ b/drivers/serial/of_serial.c
> @@ -67,7 +67,7 @@ static int __devinit of_platform_serial_setup(struct 
> of_device *ofdev,
>         port->type = type;
>         port->uartclk = *clk;
>         port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP
> -               | UPF_FIXED_PORT | UPF_FIXED_TYPE;
> +               | UPF_FIXED_PORT;
>         port->dev = &ofdev->dev;
>         /* If current-speed was set, then try not to change it. */
>         if (spd)
> 
> 
> If I trace port->type I am getting 3. (drivers/serial/8250.c:3089 
> serial8250_register_port func 3118 - serial8250_register_port)
> Grant: Could you please print that value on ppc?
> 
> Can you give me any hints what could be wrong? I will continue on it 
> tomorrow.
> 
> Thanks,
> Michal
> 
> 


-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian
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