lkml.org 
[lkml]   [2006]   [May]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC]disable msi mode in pci_disable_device
Shaohua Li <shaohua.li@intel.com> wrote:
>
> Brice said the pci_save_msi_state breaks his driver in his special usage
> (not in suspend/resume), as pci_save_msi_state will disable msi mode.

That sounds wrong of pci_save_msi_state(). It's supposed to save the
state, not to go fiddling with it.

> In
> his usage, pci_save_state will be called at runtime, and later (after
> the device operates for some time and has an error) pci_restore_state
> will be called.

Is that a sane thing for a driver to be doing? (Not relevant to this issue
though).

> In another hand, suspend/resume needs disable msi mode, as device should
> stop working completely. This patch try to workaround this issue.
> Drivers are expected call pci_disable_device in suspend time after
> pci_save_state.

Surely the drivers should be calling pci_disable_msix() or something after
saving the state rather than relying upon magical side-effects of
pci_save_msi_state(). Or we do disable_msi_mode() or whatever in
pci_disable_device().

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-05-26 21:54    [W:0.155 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site