From: David Brownell <firstname.lastname@example.org> To: Greg KH <email@example.com> Cc: firstname.lastname@example.org, email@example.com, Patrick Mochel <firstname.lastname@example.org> Subject: Re: [linux-usb-devel] [RFC] consolidate /sbin/hotplug call for pci and usb Date: Wed, 25 Sep 2002 19:44:47 -0700 [thread overview] Message-ID: <3D92749F.email@example.com> (raw) In-Reply-To: <20020926002554.GB518@kroah.com> > I also found the unload USB module problem. The driver core was calling > hotplug after the device was already removed. Made it a bit difficult > to be able to describe the device that way :) On the other hand, since there's no internal "this is an ex-device" state, that's also insurance that nothing could use "usbfs" to try to re-activate the device. I seem to recall oopses going away by reporting the hotplug "remove" events after the usbfs path could no longer be used. Not that I ever liked that consequence, but a fix adding such a "zombie" state would have taken a bit of time. The real "module unload problem" has a lot to do with not having any way to track how many devices a module is bound to ... that aren't necessarily opened at the moment. (Does Rusty's patch set touch any of that?) Without having a way to answer that question, today's un-helpful "driver is in active use" refcount would encourage rmmodding drivers that users will expect to still be available. Plug in two devices, look at one, decide to use the other, unplug the first ... and just because you hadn't yet opened the second device, its driver module vanishes. As you start to use it ... huge frustration quotient! :) - Dave
next prev parent reply other threads:[~2002-09-26 2:39 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-09-25 21:29 Greg KH 2002-09-25 22:04 ` Kai Germaschewski 2002-09-25 22:48 ` Greg KH 2002-09-26 0:11 ` [linux-usb-devel] " David Brownell 2002-09-26 0:25 ` Greg KH 2002-09-26 2:44 ` David Brownell [this message] 2002-09-26 4:27 ` Greg KH 2002-09-26 16:14 ` David Brownell 2002-09-26 18:43 ` Greg KH 2002-09-26 19:32 ` David Brownell 2002-09-26 19:34 ` Alan Stern 2002-09-26 23:35 ` [linux-usb-devel] [RFC] consolidate /sbin/hotplug call for pciand usb Oliver Neukum 2002-09-26 17:48 ` [RFC] consolidate /sbin/hotplug call for pci and usb - take 2 Greg KH [not found] <20020925212955.GA32487@kroah.com.suse.lists.linux.kernel> [not found] ` <3D9250CD.firstname.lastname@example.org> 2002-09-26 0:33 ` [linux-usb-devel] [RFC] consolidate /sbin/hotplug call for pci and usb Andi Kleen 2002-09-26 0:46 ` Matthew Dharm 2002-09-26 1:01 ` Andi Kleen 2002-09-26 2:30 ` David Brownell
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=3D92749F.email@example.com \ --firstname.lastname@example.org \ --email@example.com \ --firstname.lastname@example.org \ --email@example.com \ --firstname.lastname@example.org \ --subject='Re: [linux-usb-devel] [RFC] consolidate /sbin/hotplug call for pci and usb' \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).