Tejun Heo wrote:
Some gigabytes have on-board SIMG5723s connected to JMB ahcis. These are used to implement hardware raid. Unfortunately some firmware revisions on these 5723s don't bring the link down when all the downstream ports are unoccupied while not responding to reset protocol which makes libata think that there's device attached to the port but is not responding and retry. This results in painfully wrong boot detection time for these ports when they're empty. This patch quirks those boards such that ahci gives up after the initial timeout. Combined with parallel probing, this gives quick enough probing and also is safe because SIMG5723 will respond to the first try if any of the downstream ports is occupied. Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> Reported-by: Marc Bowes <marcbowes@xxxxxxxxx> Reported-by: Nicolas Mailhot <Nicolas.Mailhot@xxxxxxxxxxx> --- drivers/ata/ahci.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 72 insertions(+), 4 deletions(-)
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