Merge tag 'clk-for-linus-3.18' of git://git.linaro.org/people/mike.turquette/linux

[firefly-linux-kernel-4.4.55.git] / drivers / ata / libata-sff.c

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 1121153f1ecde7e08502c2a0a33bc501abc6a9bd..db90aa35cb71e9456d176dcdd1214b760165cc4c 100644 (file)
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -2008,13 +2008,15 @@ static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask,
 
        DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
 
-       /* software reset.  causes dev0 to be selected */
-       iowrite8(ap->ctl, ioaddr->ctl_addr);
-       udelay(20);     /* FIXME: flush */
-       iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
-       udelay(20);     /* FIXME: flush */
-       iowrite8(ap->ctl, ioaddr->ctl_addr);
-       ap->last_ctl = ap->ctl;
+       if (ap->ioaddr.ctl_addr) {
+               /* software reset.  causes dev0 to be selected */
+               iowrite8(ap->ctl, ioaddr->ctl_addr);
+               udelay(20);     /* FIXME: flush */
+               iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
+               udelay(20);     /* FIXME: flush */
+               iowrite8(ap->ctl, ioaddr->ctl_addr);
+               ap->last_ctl = ap->ctl;
+       }
 
        /* wait the port to become ready */
        return ata_sff_wait_after_reset(&ap->link, devmask, deadline);
@@ -2215,10 +2217,6 @@ void ata_sff_error_handler(struct ata_port *ap)
 
        spin_unlock_irqrestore(ap->lock, flags);
 
-       /* ignore ata_sff_softreset if ctl isn't accessible */
-       if (softreset == ata_sff_softreset && !ap->ioaddr.ctl_addr)
-               softreset = NULL;
-
        /* ignore built-in hardresets if SCR access is not available */
        if ((hardreset == sata_std_hardreset ||
             hardreset == sata_sff_hardreset) && !sata_scr_valid(&ap->link))