[ add linux-pci and Lukas ] Gregory Price wrote: > Depending on the device, sometimes firmware clears the busy flag > later than expected. This can cause the device to appear busy when > calling multiple commands in quick sucession. Add a 1 second retry > window to all doe commands that end with -EBUSY. I would have expected this to be handled as part of finishing off pci_doe_recv_resp() not retrying on a new submission. It also occurs to me that instead of warning "another entity is sending conflicting requests" message, the doe core should just ensure that it is the only agent using the mailbox. Something like hold the PCI config lock over DOE transactions. Then it will remove ambiguity of "conflicting agent" vs "device is slow to clear BUSY".
