It absolutely was not vague, it gave an explicit description of what the problem was, down to the transaction type being used by 5706 and what the stated rules are in the PCI spec, and it also gave a clear indication that the 5706 was in the wrong and that this was believed to be a unique situation.
I'm not disagreeing with a per-driver check at the moment, but I thought that Michael told us that the masking being attempted by the 5706 was legal:
Michael Chan wrote:
MSI is defined to be 32-bit write. The 5706 does 64-bit MSI writes with byte enables disabled on the unused 32-bit word. This is legal but causes problems on the AMD 8132 which will eventually stop responding after a while.
> ...
MSI is defined to be 32-bit write. The 5706 does 64-bit MSI writes with byte enables disabled on the unused 32-bit word. This is legal but causes problems on the AMD 8132 which will eventually stop responding after a while.
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