Messages in this thread | | | Date | Fri, 26 May 2006 22:26:57 +0200 | From | Brice Goglin <> | Subject | Re: [RFC]disable msi mode in pci_disable_device |
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Andrew Morton wrote: >> 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).
The aim is to be able to recover from a memory parity error in the NIC. Such errors happen sometimes, especially when a cosmic ray comes by. To recover, we restore the state that we saved at the end of the initialization. As saving currently disables MSI, we currently have to restore the state right after saving it at the end of the initialization (see the end of myri10ge_probe in http://lkml.org/lkml/2006/5/23/24).
I just tried, the patch fixes our problem (no need to restore right after saving to reenable MSI).
Brice
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