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[v2,5/5] sparc64: print debug messages when reading from LDC channel

Message ID e68259d693d5cec9ab87fc57b07020bc918cce2d.1494551284.git.jag.raman@oracle.com
State Changes Requested
Delegated to: David Miller
Headers show

Commit Message

Jag Raman May 12, 2017, 1:30 a.m. UTC 
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>
---
 arch/sparc/kernel/ldc.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
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Patch

diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c
index f53f672..1471d57 100644
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -1985,6 +1985,8 @@  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;
 
@@ -2000,6 +2002,9 @@  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);