ahci: Reorder error cases in handle_cmd
Error checking in ahci's handle_cmd is re-ordered so that we initialize as few things as possible before we've done our sanity checking. This simplifies returning from this call in case of an error. A check to make sure the DMA memory map succeeds with the correct size is also added, and the debug print of the command fis is cleaned up with its size corrected. Signed-off-by: NJohn Snow <jsnow@redhat.com> Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com> Message-id: 1415058979-16604-4-git-send-email-jsnow@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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