From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kay Sievers Date: Wed, 07 Oct 2009 20:12:28 +0000 Subject: Re: [BUG] No ttyS0 - Strange udev 8250_pnp interaction Message-Id: List-Id: References: <20091007175403.GA335@trillian.comsick.at> <9b2b86520910071246r393f2afvacaa4d8f544508a8@mail.gmail.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Alan Jenkins Cc: Michael Guntsche , linux-kernel , linux-hotplug On Wed, Oct 7, 2009 at 22:06, Kay Sievers wrote: > On Wed, Oct 7, 2009 at 21:46, Alan Jenkins > wrote: >> Udev would have avoided the race prior to >> >> 82c785e "udevd: remove check for dev_t, DEVPATH_OLD takes care of that" >> >> (the "check" removed here used to serialize events based on the device >> major:minor number). >> >> So - udev probably needs to add the check back. > > What are the two devices with the same major/minor but a different DEVPAT= H? To be more specific, Michael, can you please run "udevadm monitor" at the same time you see this happen? >> It might also be the case that future kernels could set DEVPATH_OLD as >> suggested. =C2=A0I don't know the gory details of 8250_pnp though. > > The DEVPATH_OLD is only added when one and the same device was renamed > or moved, which isn't the case here, I guess? Thanks, Kay