2019-09-03 19:18, Stephen Warren swarren@wwwdotorg.org:
Is it possible/sensible to distinguish between "file not found" and "error during retrieval"? "File not found" indicates the case you care about, and continuing to use a built-in DT makes sense here. "Error during retrieval" indicates that the file was found, and hence really should be use, yet couldn't be due to download failure. In this case, I wonder if we shouldn't outright fail this boot option, just like the existing code does?
But either way, I suppose this patch is reasonable.
As I see, for example from do_get_ext2(), currently it is not possible to distinguish between "file not found" and "error during retrieval". It seems possible to update all do_get_*() functions to check file existence before retrieving, but it will require extensive testing and I prefer this to be changed independently to current patch.
Best regards,