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    libata-core: Fix simplex handling · 032af1ce
    Alan 提交于
    The initial simplex handling code is fooled if you suspend and resume.
    This also causes problems with some single channel controllers which
    claim to be simplex.
    
    The fix is fairly simple, instead of keeping a flag to remember if we
    gave away the simplex channel we remember the actual owner. As the owner
    is always part of the host_set we don't even need a refcount.
    
    Knowing the owner also means we can reassign simplex DMA channels in
    future hotplug code etc if we need to
    Signed-off-by: NAlan Cox <alan@redhat.com>
    (and a signed-off for the patch I sent before while I remember)
    Signed-off-by: NJeff Garzik <jeff@garzik.org>
    032af1ce
libata.h 37.1 KB