Messages in this thread | | | Date | Wed, 24 Mar 2010 22:05:19 +0530 (IST) | From | Pavan Savoy <> | Subject | Re: [PATCH 4/6] drivers:misc: sources for Init manager module |
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--- On Wed, 24/3/10, Greg KH <gregkh@suse.de> wrote:
> From: Greg KH <gregkh@suse.de> > Subject: Re: [PATCH 4/6] drivers:misc: sources for Init manager module > To: "Marcel Holtmann" <marcel@holtmann.org> > Cc: "Pavan Savoy" <pavan_savoy@yahoo.co.in>, "PavanSavoy" <pavan_savoy@ti.com>, "alan@lxorguk.ukuu.org.uk" <alan@lxorguk.ukuu.org.uk>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org> > Date: Wednesday, 24 March, 2010, 9:56 PM > On Wed, Mar 24, 2010 at 09:11:45AM > -0700, Marcel Holtmann wrote: > > > I wanted to somehow put this in staging because > then it would probably have a thorough architectural review > process. > > > Some details about this driver - > > > > > > 1. This driver will be used by > Bluetooth-BlueZ/FM-V4L2 and GPS (probably character device > driver) using the EXPORTED symbols (-register/_unregister). > > > > > > 2. Much like the hciattach daemon which maintains > N_HCI bluetooth line discipline, this driver will also have > a User-Space N_TI_WL Init manager (UIM) maintaining > the Line discipline. > > > > can you explain why you think this is needed and we > can not interface > > this directly. If it is a serial port, what protocol > does it talk? > > > > > 3. Because of the UIM should know when to > install/uninstall line discipline, the /sys entry is created > a root called UIM (a new kobject) and UIM daemon would write > it's PID to it. > > > > I don't understand this. This sounds like a broken > concept to me. > > I also agree, those sysfs files are not acceptable, and > will not work > as-designed due to the pid namespace issues :(
Ok, How do I then from kernel space, ask a user-space daemon to open the TTY port and do a tiocsetd on it ? [i.e ask for a line discipline to be installed ?]
Can't open the TTY and TIOCSETD upon boot, because BT, FM and GPS might be used or not used anytime.
And the idea of creating a device node, specifically for this and then doing an fasync/SIGIO was somehow rubbished.
> > thanks, > > greg k-h > -- > To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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