From: Ian Abbott <abbotti@mev.co.uk> To: Tong Zhang <ztong0001@gmail.com> Cc: H Hartley Sweeten <hsweeten@visionengravers.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, "Alexander A. Klimov" <grandmaster@al2klimov.de>, devel@driverdev.osuosl.org, open list <linux-kernel@vger.kernel.org> Subject: Re: [PATCH] staging: comedi: replace slash in name Date: Tue, 16 Mar 2021 10:37:47 +0000 [thread overview] Message-ID: <92b7c57b-b645-9965-8157-4ca76a803cba@mev.co.uk> (raw) In-Reply-To: <CAA5qM4AJRYndkXSiW5Y4OCFcH97mf6UiiEEox+TQs8-N957mJA@mail.gmail.com> On 15/03/2021 20:00, Tong Zhang wrote: > Thanks Ian, > I have submitted a v2 patch based on your suggestions. > Thanks, > - Tong Thanks. I think the only other Comedi driver with the same problem is "drivers/staging/comedi/drivers/das800.c". It passes dev->board_name as the name argument of request_irq(), but that is "cio-das802/16" for one of the boards supported by the driver. > On Mon, Mar 15, 2021 at 6:48 AM Ian Abbott <abbotti@mev.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@gmail.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@mev.co.uk> || MEV Ltd. is a company )=- -=( registered in England & Wales. Regd. number: 02862268. )=- -=( Regd. addr.: S11 & 12 Building 67, Europa Business Park, )=- -=( Bird Hall Lane, STOCKPORT, SK3 0XA, UK. || www.mev.co.uk )=-
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From: Ian Abbott <abbotti@mev.co.uk> To: Tong Zhang <ztong0001@gmail.com> Cc: devel@driverdev.osuosl.org, open list <linux-kernel@vger.kernel.org>, "Alexander A. Klimov" <grandmaster@al2klimov.de>, Greg Kroah-Hartman <gregkh@linuxfoundation.org> Subject: Re: [PATCH] staging: comedi: replace slash in name Date: Tue, 16 Mar 2021 10:37:47 +0000 [thread overview] Message-ID: <92b7c57b-b645-9965-8157-4ca76a803cba@mev.co.uk> (raw) In-Reply-To: <CAA5qM4AJRYndkXSiW5Y4OCFcH97mf6UiiEEox+TQs8-N957mJA@mail.gmail.com> On 15/03/2021 20:00, Tong Zhang wrote: > Thanks Ian, > I have submitted a v2 patch based on your suggestions. > Thanks, > - Tong Thanks. I think the only other Comedi driver with the same problem is "drivers/staging/comedi/drivers/das800.c". It passes dev->board_name as the name argument of request_irq(), but that is "cio-das802/16" for one of the boards supported by the driver. > On Mon, Mar 15, 2021 at 6:48 AM Ian Abbott <abbotti@mev.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@gmail.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@mev.co.uk> || MEV Ltd. is a company )=- -=( registered in England & Wales. Regd. number: 02862268. )=- -=( Regd. addr.: S11 & 12 Building 67, Europa Business Park, )=- -=( Bird Hall Lane, STOCKPORT, SK3 0XA, UK. || www.mev.co.uk )=- _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
next prev parent reply other threads:[~2021-03-16 10:40 UTC|newest] Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-14 3:57 [PATCH] staging: comedi: replace slash in name Tong Zhang 2021-03-14 3:57 ` Tong Zhang 2021-03-15 10:44 ` Ian Abbott 2021-03-15 10:44 ` Ian Abbott 2021-03-15 10:48 ` Ian Abbott 2021-03-15 10:48 ` Ian Abbott 2021-03-15 19:58 ` [PATCH v2] staging: comedi: cb_pcidas64: fix request_irq() warn Tong Zhang 2021-03-15 19:58 ` Tong Zhang 2021-03-16 10:31 ` Ian Abbott 2021-03-16 10:31 ` Ian Abbott 2021-03-15 20:00 ` [PATCH] staging: comedi: replace slash in name Tong Zhang 2021-03-15 20:00 ` Tong Zhang 2021-03-16 10:37 ` Ian Abbott [this message] 2021-03-16 10:37 ` Ian Abbott 2021-03-16 22:42 ` [PATCH] staging: comedi: das800: fix request_irq() warn Tong Zhang 2021-03-16 22:42 ` Tong Zhang 2021-03-17 5:14 ` Dan Carpenter 2021-03-17 5:14 ` Dan Carpenter [not found] ` <CAA5qM4BcQ6+aa1C3_28zLVojwLduK-WZwsEftuasJgo8z0t0ew@mail.gmail.com> 2021-03-17 6:52 ` Dan Carpenter 2021-03-17 6:52 ` Dan Carpenter 2021-03-17 22:43 ` Tong Zhang 2021-03-17 22:43 ` Tong Zhang 2021-03-17 12:48 ` Ian Abbott 2021-03-17 12:48 ` Ian Abbott 2021-03-19 3:47 ` [PATCH v2] " Tong Zhang 2021-03-19 3:47 ` Tong Zhang 2021-03-19 3:48 ` [PATCH] " Tong Zhang 2021-03-19 3:48 ` Tong Zhang 2021-03-16 22:42 ` [PATCH] staging: comedi: replace slash in name Tong Zhang 2021-03-16 22:42 ` Tong Zhang
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