linux-kernel - Re: [PATCH] staging: comedi: replace slash in name

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Date:   Mon, 15 Mar 2021 16:00:16 -0400
From:   Tong Zhang <ztong0001@...il.com>
To:     Ian Abbott <abbotti@....co.uk>
Cc:     H Hartley Sweeten <hsweeten@...ionengravers.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Alexander A. Klimov" <grandmaster@...klimov.de>,
        devel@...verdev.osuosl.org,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: comedi: replace slash in name

Thanks Ian,
I have submitted a v2 patch based on your suggestions.
Thanks,
- Tong

On Mon, Mar 15, 2021 at 6:48 AM Ian Abbott <abbotti@....co.uk> wrote:
>
> On 15/03/2021 10:44, Ian Abbott wrote:
> > On 14/03/2021 03:57, Tong Zhang wrote:
> >> request_irq() wont accept a name which contains slash so we need to
> >> repalce it with something else -- otherwise it will trigger a warning
> >> and the entry in /proc/irq/ will not be created
> >>
> >> [    1.565966] name 'pci-das6402/16'
> >> [    1.566149] WARNING: CPU: 0 PID: 184 at fs/proc/generic.c:180 __xlate_proc_name+0x93/0xb0
> >> [    1.568923] RIP: 0010:__xlate_proc_name+0x93/0xb0
> >> [    1.574200] Call Trace:
> >> [    1.574722]  proc_mkdir+0x18/0x20
> >> [    1.576629]  request_threaded_irq+0xfe/0x160
> >> [    1.576859]  auto_attach+0x60a/0xc40 [cb_pcidas64]
> >>
> >> Signed-off-by: Tong Zhang <ztong0001@...il.com>
> [snip]
> > Userspace applications can use these strings to determine the board
> > type, so changing the strings would break those applications.
> >
> > I suggest passing the comedi driver name "cb_pcidas" to request_irq()
> > for now.
>
> Oops, I meant "cb_pcidas64".  But you could reach that via
> dev->driver->driver_name if you want (where dev is the struct
> comedi_device * parameter).
>
> --
> -=( Ian Abbott <abbotti@....co.uk> || MEV Ltd. is a company  )=-
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