sparc64: print debug messages when reading from LDC channel

Print debug messages when reading from given LDC channel.

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Aaron Young <aaron.young@oracle.com>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Reviewed-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c
index 47817b78ebfc..97a5743b04e2 100644
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -1950,6 +1950,8 @@ int ldc_read(struct ldc_channel *lp, void *buf, unsigned int size)
         unsigned long flags;
         int err;
 
+        ldcdbg(RX, "%s: entered size=%d\n", __func__, size);
+
         if (!buf)
                 return -EINVAL;
 
@@ -1965,6 +1967,9 @@ int ldc_read(struct ldc_channel *lp, void *buf, unsigned int size)
 
         spin_unlock_irqrestore(&lp->lock, flags);
 
+        ldcdbg(RX, "%s: mode=%d, head=%lu, tail=%lu rv=%d\n", __func__,
+               lp->cfg.mode, lp->rx_head, lp->rx_tail, err);
+
         return err;
 }
 EXPORT_SYMBOL(ldc_read);