254306 |
13-Aug-2013 |
scottl |
Merge r254263:
Update PCI drivers to no longer look at the MEMIO-enabled bit in the PCI command register. The lazy BAR allocation code in FreeBSD sometimes disables this bit when it detects a range conflict, and will re-enable it on demand when a driver allocates the BAR. Thus, the bit is no longer a reliable indication of capability, and should not be checked. This results in the elimination of a lot of code from drivers, and also gives the opportunity to simplify a lot of drivers to use a helper API to set the busmaster enable bit.
This changes fixes some recent reports of disk controllers and their associated drives/enclosures disappearing during boot.
Candidate for 9.2
Submitted by: jhb Reviewed by: jfv, marius, adrian, achim
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