On Fri, 30 Jul 2010, Eric W. Biederman wrote:
David Woodhouse <dw...@infradead.org> writes:
The DMA gets blocked, and you don't have to worry about whether the device was
shut down cleanly or not. The device may be unhappy, but when the new kernel's
driver loads and reinitialises it, all should be forgiven.
Assuming IOMMU page faults don't cause pain. I seem to remember that
also being a nasty issue.
Only if the driver (or the hardware) is so broken that it can't reccover.
There's very little excuse for a driver to have that problem even at
runtime (and fail to recover from such an error)... for a driver to fail
to initialise the hardware even when that driver is first being loaded is
*entirely* fucked.
Not that it doesn't happen, of course. But do we care? I lump those
broken drivers is the same class as the ones which only work after a warm
start from Windows or Mac OS.
--
dwmw2
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