[PATCH] powerpc: fix up iSeries console after TTY layer buffering revamp

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/char/viocons.c b/drivers/char/viocons.c
index bead38a4a68a..faee5e7acaf7 100644
--- a/drivers/char/viocons.c
+++ b/drivers/char/viocons.c
@@ -904,6 +904,7 @@ static void vioHandleData(struct HvLpEvent *event)
         struct viocharlpevent *cevent = (struct viocharlpevent *)event;
         struct port_info *pi;
         int index;
+        int num_pushed;
         u8 port = cevent->virtual_device;
 
         if (port >= VTTY_PORTS) {
@@ -964,6 +965,7 @@ static void vioHandleData(struct HvLpEvent *event)
          * functionality will only work if built into the kernel and
          * then only if sysrq is enabled through the proc filesystem.
          */
+        num_pushed = 0;
         for (index = 0; index < cevent->len; index++) {
 #ifdef CONFIG_MAGIC_SYSRQ
                 if (sysrq_enabled) {
@@ -997,11 +999,10 @@ static void vioHandleData(struct HvLpEvent *event)
                         printk(VIOCONS_KERN_WARN "input buffer overflow!\n");
                         break;
                 }
+                num_pushed++;
         }
 
-        /* if cevent->len == 0 then no data was added to the buffer and flip.count == 0 */
-        if (tty->flip.count)
-                /* The next call resets flip.count when the data is flushed. */
+        if (num_pushed)
                 tty_flip_buffer_push(tty);
 }