• Conke Hu's avatar
    ahci.c: walkaround for SB600 SATA internal error issue · 55a61604
    Conke Hu authored
       There is a HW issue in ATI SB600 SATA that PxSERR.E should not be
    set on some conditions, for example, when there is no media in SATA
    CD/DVD drive or media is not ready, AHCI controller fails to execute
    ATAPI commands and reports PORT_IRQ_TF_ERR, but ATI SB600 SATA
    controller sets PxSERR.E at the
    same time, which is not necessary.
        This patch is just to ignore the INTERNAL ERROR in such case.
    Without this patch, ahci error handler will report many errors as
    below:
        ----------- cut from dmesg -----------
    ata9: soft resetting port
    ata9: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
    ata9.00: configured for UDMA/33
    ata9: EH complete
    ata9.00: exception Emask 0x40 SAct 0x0 SErr 0x800 action 0x2
    ata9.00: (irq_stat 0x40000001)
    ata9.00: cmd a0/00:00:00:00:20/00:00:00:00:00/a0 tag 0 cdb 0x0 data 0
            res 51/24:03:00:00:20/00:00:00:00:00/a0 Emask 0x40 (internal error)
    ata9: soft resetting port
    ata9: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
    ata9.00: configured for UDMA/33
    ata9: EH complete
    ata9.00: exception Emask 0x40 SAct 0x0 SErr 0x800 action 0x2
    ata9.00: (irq_stat 0x40000001)
    ata9.00: cmd a0/01:00:00:00:00/00:00:00:00:00/a0 tag 0 cdb 0x43 data 12 in
            res 51/24:03:00:00:00/00:00:00:00:00/a0 Emask 0x40 (internal error)
        -------- end cut ---------
    Signed-off-by: default avatarConke Hu <conke.hu@amd.com>
    Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
    55a61604
ahci.c 46.7 KB