Tejun Heo wrote:
SIS controllers were blacklisted for PMP as enabling it made device detection fail whether the device was PMP or not - the natural conclusion was the controller chokes on SRST w/ pmp==15. However, it turned out that the controller just didn't like issuing SRST after hardreset w/o clearing SError first. Interestingly, the SRST itself succeeds but the following commands fail. If SError is cleared between hardreset and SRST, which is the default behavior now, everything works fine and SIS controllers work with PMPs happily. Remove PMP blacklisting for SIS AHCIs. Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> Cc: Piter PUNK <piterpunk@xxxxxxxxxxxxx> --- drivers/ata/ahci.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
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