Date: Mon, 26 Jun 2000 01:22:41 -0700 From: Mike Smith <msmith@freebsd.org> To: Lyndon Nerenberg <lyndon@orthanc.ab.ca> Cc: freebsd-hackers@freebsd.org Subject: Re: Concurrent access to SMbus Message-ID: <200006260822.BAA00567@mass.osd.bsdi.com> In-Reply-To: Your message of "Mon, 05 Jun 2000 14:47:04 MDT." <200006052047.e55Kl5X51895@orthanc.ab.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
> I notice that the /dev/smbX devices are exclusive access. This makes > it impossible to run two (or more) programs concurrently that want > to talk to SMbus devices (in my case, healthd and lmmon, both of which > want to open /dev/smb0 to access the LM78). > > Is this an SMbus restriction, or an artifact of the smb driver? I did a > very quick scan through /sys/dev/smbus/* and nothing jumped out to > indicate why it needs to be exclusive access. Transactions on the bus should be locked, ie. only one client talking at a time, but it should probably be feasible to allow more than one opener. The SMBus code is dearly in need of a maintainer. 8( -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200006260822.BAA00567>