libata: separate out ata_std_postreset() from ata_sff_postreset()

Separate out generic ATA portion from ata_sff_postreset() into
ata_std_postreset() and implement ata_sff_postreset() using the std
version.

ata_base_port_ops now has ata_std_postreset() for its postreset and
ata_sff_port_ops overrides it to ata_sff_postreset().

This change affects pdc_adma, ahci, sata_fsl and sata_sil24.  pdc_adma
now specifies postreset to ata_sff_postreset() explicitly.  sata_fsl
and sata_sil24 now use ata_std_postreset() which makes no difference
to them.  ahci now calls ata_std_postreset() from its own postreset
method, which causes no behavior difference.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 4 insertions, 20 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 5f771bb44332..eaead76c9443 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -76,7 +76,7 @@ const unsigned long sata_deb_timing_long[]		= { 100, 2000, 5000 };
 const struct ata_port_operations ata_base_port_ops = {
         .prereset               = ata_std_prereset,
         .hardreset              = sata_sff_hardreset,
-        .postreset              = ata_sff_postreset,
+        .postreset              = ata_std_postreset,
         .error_handler          = ata_std_error_handler,
 };
 
@@ -3516,7 +3516,7 @@ int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
 }
 
 /**
- *      ata_sff_postreset - standard postreset callback
+ *      ata_std_postreset - standard postreset callback
  *      @link: the target ata_link
  *      @classes: classes of attached devices
  *
@@ -3527,9 +3527,8 @@ int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
  *      LOCKING:
  *      Kernel thread context (may sleep)
  */
-void ata_sff_postreset(struct ata_link *link, unsigned int *classes)
+void ata_std_postreset(struct ata_link *link, unsigned int *classes)
 {
-        struct ata_port *ap = link->ap;
         u32 serror;
 
         DPRINTK("ENTER\n");
@@ -3542,22 +3541,6 @@ void ata_sff_postreset(struct ata_link *link, unsigned int *classes)
                 sata_scr_write(link, SCR_ERROR, serror);
         link->eh_info.serror = 0;
 
-        /* is double-select really necessary? */
-        if (classes[0] != ATA_DEV_NONE)
-                ap->ops->sff_dev_select(ap, 1);
-        if (classes[1] != ATA_DEV_NONE)
-                ap->ops->sff_dev_select(ap, 0);
-
-        /* bail out if no device is present */
-        if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
-                DPRINTK("EXIT, no device\n");
-                return;
-        }
-
-        /* set up device control */
-        if (ap->ioaddr.ctl_addr)
-                iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
-
         DPRINTK("EXIT\n");
 }
 
@@ -6096,6 +6079,7 @@ EXPORT_SYMBOL_GPL(sata_link_debounce);
 EXPORT_SYMBOL_GPL(sata_link_resume);
 EXPORT_SYMBOL_GPL(ata_std_prereset);
 EXPORT_SYMBOL_GPL(sata_link_hardreset);
+EXPORT_SYMBOL_GPL(ata_std_postreset);
 EXPORT_SYMBOL_GPL(ata_dev_classify);
 EXPORT_SYMBOL_GPL(ata_dev_pair);
 EXPORT_SYMBOL_GPL(ata_port_disable);