On 01/27/2012 09:26 AM, Jesse Barnes wrote: > On Fri, 02 Dec 2011 15:10:08 -0800 > Yinghai Lu <yinghai.lu@xxxxxxxxxx> wrote: > >> >> One system have repeater in system board to support gen2 hotplug. >> >> Found when EM is removed from some slots, /var/log/message will be full of >> "card present/not present" warning. >> >> It turns out root complex still try to train the link to repeater because >> repeater is not reset. >> >> This patch will disable link to make repeater could reset properly. >> Also could kill AER during EM removal. >> >> Recently when testing hotplug on one system under development, found if boot >> the system without EM, and later hotplug does not work with Linux. >> But other OS is ok. >> The root cause is that bios left link disabled when slot is empty, >> and other OS is playing link disable bit in link ctrl during power on/off. >> >> So We could do the same thing to disable/enable link during power off/on. >> >> Signed-off-by: Yinghai Lu <yinghai.lu@xxxxxxxxxx> > > Ok I had to massage that commit message quite a bit, please let me know > if it's still accurate. > > The 100ms delay still needs to be clarified; if it's really necessary > maybe we could move the delays into a delayed work handler? Please you check updated versions that i sent later. it was changed to three patches... i sent those patchs 1/123 git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-pci-hp you can find other patches in git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-pci2 and git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-pci-busn-alloc Thanks Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
