[PATCH] libata-hp: implement bootplug

Implement bootplug - boot probing via hotplug path.  While loading,
ata_host_add() simply schedules probing and invokes EH.  After EH
completes, ata_host_add() scans and assicates them with SCSI devices.
EH path is slightly modified to handle this (e.g. no autopsy during
bootplug).  The SCSI part is left in ata_host_add() because it's
shared with legacy path and to keep probing order as before (ATA scan
all ports in host_set then attach all).

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

1 files changed, 18 insertions, 9 deletions

diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 733dfa532977..70c132bef68e 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -287,11 +287,14 @@ void ata_scsi_error(struct Scsi_Host *host)
         /* clean up */
         spin_lock_irqsave(hs_lock, flags);
 
-        if (ap->flags & ATA_FLAG_SCSI_HOTPLUG)
-                queue_work(ata_aux_wq, &ap->hotplug_task);
-
-        if (ap->flags & ATA_FLAG_RECOVERED)
-                ata_port_printk(ap, KERN_INFO, "EH complete\n");
+        if (ap->flags & ATA_FLAG_LOADING) {
+                ap->flags &= ~ATA_FLAG_LOADING;
+        } else {
+                if (ap->flags & ATA_FLAG_SCSI_HOTPLUG)
+                        queue_work(ata_aux_wq, &ap->hotplug_task);
+                if (ap->flags & ATA_FLAG_RECOVERED)
+                        ata_port_printk(ap, KERN_INFO, "EH complete\n");
+        }
 
         ap->flags &= ~(ATA_FLAG_SCSI_HOTPLUG | ATA_FLAG_RECOVERED);
 
@@ -1367,6 +1370,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
         struct ata_eh_context *ehc = &ap->eh_context;
         unsigned int *classes = ehc->classes;
         int tries = ATA_EH_RESET_TRIES;
+        int verbose = !(ap->flags & ATA_FLAG_LOADING);
         unsigned int action;
         ata_reset_fn_t reset;
         int i, did_followup_srst, rc;
@@ -1414,8 +1418,10 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
         }
 
  retry:
-        ata_port_printk(ap, KERN_INFO, "%s resetting port\n",
-                        reset == softreset ? "soft" : "hard");
+        /* shut up during boot probing */
+        if (verbose)
+                ata_port_printk(ap, KERN_INFO, "%s resetting port\n",
+                                reset == softreset ? "soft" : "hard");
 
         /* reset */
         ata_eh_about_to_do(ap, ATA_EH_RESET_MASK);
@@ -1799,8 +1805,11 @@ void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
                ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
                ata_postreset_fn_t postreset)
 {
-        ata_eh_autopsy(ap);
-        ata_eh_report(ap);
+        if (!(ap->flags & ATA_FLAG_LOADING)) {
+                ata_eh_autopsy(ap);
+                ata_eh_report(ap);
+        }
+
         ata_eh_recover(ap, prereset, softreset, hardreset, postreset);
         ata_eh_finish(ap);
 }