[SPARC64]: Handle LDC resets properly in domain-services driver.

Reset the handshake and per-capability state so that when the
link comes back up we'll renegotiate the DS version and then
reregister all of the services.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/ds.c b/arch/sparc64/kernel/ds.c
index ba01533f4e03..fa1f04d756a2 100644
--- a/arch/sparc64/kernel/ds.c
+++ b/arch/sparc64/kernel/ds.c
@@ -1013,6 +1013,19 @@ static void ds_up(struct ds_info *dp)
                 dp->hs_state = DS_HS_START;
 }
 
+static void ds_reset(struct ds_info *dp)
+{
+        int i;
+
+        dp->hs_state = 0;
+
+        for (i = 0; i < ARRAY_SIZE(ds_states); i++) {
+                struct ds_cap_state *cp = &ds_states[i];
+
+                cp->state = CAP_STATE_UNKNOWN;
+        }
+}
+
 static void ds_event(void *arg, int event)
 {
         struct ds_info *dp = arg;
@@ -1028,6 +1041,12 @@ static void ds_event(void *arg, int event)
                 return;
         }
 
+        if (event == LDC_EVENT_RESET) {
+                ds_reset(dp);
+                spin_unlock_irqrestore(&ds_lock, flags);
+                return;
+        }
+
         if (event != LDC_EVENT_DATA_READY) {
                 printk(KERN_WARNING PFX "Unexpected LDC event %d\n", event);
                 spin_unlock_irqrestore(&ds_lock, flags);