[PATCH 4/5] SLIP: Add error message for xleft non-zero

[Dean Jenkins]

Add a printk to show when xleft is non-zero in sl_encaps.

The idea is to see whether a previous SLIP frame failed to be
fully transmitted.

Signed-off-by: Dean Jenkins <Dean_Jenkins@xxxxxxxxxx>
---
 drivers/net/slip/slip.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c
index f7303e0..e2eff84 100644
--- a/drivers/net/slip/slip.c
+++ b/drivers/net/slip/slip.c
@@ -395,6 +395,10 @@ static void sl_encaps(struct slip *sl, unsigned char *icp, int len)
 #endif
 		count = slip_esc(p, sl->xbuff, len);
 
+	if (sl->xleft)
+		printk(KERN_ERR "%s: ERROR: xleft is non-zero %d\n",
+		       __func__, sl->xleft);
+
 	/* ensure xleft set by the previous SLIP frame is zero for this frame
 	 * otherwise slip_write_wakeup() can cause a recursive loop.
 	 */
-- 
1.8.1.5

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