linux-kernel - Re: [PATCH v5] arm pl011 serial: support multi-irq request

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Message-ID: <7535ae2f-6a12-8203-0498-8ac85ab0d9a7@arm.com>
Date:   Mon, 26 Jul 2021 21:36:21 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     Qian Cai <quic_qiancai@...cinc.com>, Bing Fan <hptsfb@...il.com>,
        gregkh@...uxfoundation.org, Bing Fan <tombinfan@...cent.com>
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5] arm pl011 serial: support multi-irq request

On 2021-07-26 17:39, Qian Cai wrote:
> 
> 
> On 7/26/2021 3:17 AM, Bing Fan wrote:
>> Hello,
>>
>> I tried to reproduce, but unfortunately, it didn't, and the dmesg log as
>> attachment.
>>
>> I had enabled CONFIG_KASAN and CONFIG_SLUB_DEBUG_ON configs.
>>
>> Can you describe the flow of your operation?
>>
> Nothing fancy. Just boot a baremetal ARM server on linux-next could trigger it.
> The .config is here.

The important point you're missing, but which the KASAN dump does hint 
at, is that that is a machine with SBSA generic UARTs booting via ACPI - 
I know it doesn't do DT at all because I have one too. What matters 
there is that pl011 binds as a platform driver, *not* an amba driver.

Robin.