Hi Greg
>How is things crashing on startup when you are messing with data being sent on
>shutdown?
>Are you still sending data at startup time?
Yes, I always sending data at startup. Actually I keep sending "reboot" to
serial port, all the time, no break, regardless of any response from system.
On Fri, Nov 03, 2017 at 10:48:04AM +, taoyuhong wrote:
> Hi Alan
>
> Serial tty oops on real arm computer.
>
> That is Hikey960 board, with 8 cortex-a57 cpus and pl011 serial hardware.
> Debian8 is pre-installed, and I replaced the kernel with linux-stable 4.13.10.
>
> It is very easy to tri
Hi Gerg
> Because of this text, I am not allowed to respond to your emails, sorry :(
That is my fault! Please let me re-send these message.
> This feels "odd", are we sure that open really should be clearning this flag?
Because the pty devices also use tty_init_dev(), to create tty_struct , and
On Thu, Oct 26, 2017 at 12:10:20PM +, taoyuhong wrote:
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> This e-mail and its attachments contain confidential information from HUAWEI,
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> I can reproduce this problem on CentOS now. It seems better to leave this
> problem to drivers, not the user process.
> Do you think we should examine serial drivers of ARM, like pl011?
Can you reproduce it on real hardware - I ask because the driver has been
around for years without reports an
> When tty_open() is opening a serial tty at the first time, after
> alloc_tty_struct() is called, before tty->ops->open() is finished.
That's kind of unavoidable.
> Serial driever like pl011 on ARM is ready to setup kworker threads
> to receive data with flush_to_ldisc(). Serial input at this ti
On Wed, Oct 25, 2017 at 10:15:35AM +0800, taoyuhong wrote:
> From: Yuhong Tao
>
> When tty_open() is opening a serial tty at the first time, after
> alloc_tty_struct() is called, before tty->ops->open() is finished.
> Serial driever like pl011 on ARM is ready to setup kworker threads
> to receive
From: Yuhong Tao
When tty_open() is opening a serial tty at the first time, after
alloc_tty_struct() is called, before tty->ops->open() is finished.
Serial driever like pl011 on ARM is ready to setup kworker threads
to receive data with flush_to_ldisc(). Serial input at this time
window can trigg
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