[lkml]   [2005]   [May]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] PCI: Add pci shutdown ability
On Wed, 11 May 2005, Vivek Goyal wrote:

> > I looked into the possibility of having the PCI core disable interrupt
> > generation and DMA on each new device as it is discovered. Unfortunately
> > there is no dependable, universal way to do this for IRQs. (A notable gap
> > in the original PCI specification, IMHO.)
> PCI specification 2.3 onwards, command register bit 10 can be used for
> disabling the interrupts from respective device. And the very reason for
> introducing this bit seems to be to not allow the device issue interrupts
> until a suitable driver for the device has been loaded. Have a look at
> following message.
> Probably this feature can be used to disable the interrupts from the devices
> and enable these back when respective driver is loaded. This will resolve
> the problem of drivers not getting initialized in second kernel due to shared
> interrupts in kdump and reliability of capturing dump can be increased.

That's good, and it's certainly a step in the right direction. It won't
help with any pre-PCI-2.3 devices out there but it might be worth trying
to implement.

Alan Stern

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-05-11 16:49    [W:0.097 / U:27.640 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site