Albert Lee wrote:
handle ERR=1 DRQ=1 for PIO protocol Signed-off-by: Albert Lee <albertcc@xxxxxxxxxx> --- Some PIO read commands might set DRQ=1 alone with ERR=1. Under such situation, the data block should be transferred even if err=1. This patch adds extra logic to HSM_ST_ERR to handle the required data transfer. BTW, also found the following work in progress: "Disable Data Transfer after Error Detection" http://t13.org/docs2006/dt1825Lr3-DDT_TR.pdf If this feature is turned on, then DRQ will be guaranteed 0 when ERR=1 which would simplify the PIO error handling. Patch against the irq-pio branch. Need your review and advice, thanks.
If DRQ==1 then the error register and ATA_ERR should be considered irrelevant. I agree with Eric, that's more of a "don't touch it, other than to SRST it" situation.
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