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[ Upstream commit83b4605b0c] We need to return an error for any call that asks for MSI / MSI-X vectors only, so that non-trivial fallback logic can work properly. Also valid dev->irq and use the "correct" errno value based on feedback from Linus. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Steven Rostedt <rostedt@goodmis.org> Fixes:aff17164("PCI: Provide sensible IRQ vector alloc/free routines") Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>