From: Dean Jenkins <Dean_Jenkins@mentor.com>
To: Andre Naujoks <nautsch2@gmail.com>, linux-kernel@vger.kernel.org
Cc: Jiri Slaby <jslaby@suse.cz>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH 4/5] SLIP: Add error message for xleft non-zero
Date: Tue, 2 Jul 2013 16:31:33 +0100 [thread overview]
Message-ID: <1372779094-11730-5-git-send-email-Dean_Jenkins@mentor.com> (raw)
In-Reply-To: <1372779094-11730-1-git-send-email-Dean_Jenkins@mentor.com>
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@mentor.com>
---
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
next prev parent reply other threads:[~2013-07-02 15:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-02 15:31 [PATCH 0/5] SLIP SLIP-Improve robustness to crashing Dean Jenkins
2013-07-02 15:31 ` [PATCH 1/5] Bluetooth: Add RFCOMM TTY write return error codes Dean Jenkins
2013-07-24 23:12 ` Peter Hurley
2013-07-02 15:31 ` [PATCH 2/5] SLIP: Handle error codes from the TTY layer Dean Jenkins
2013-07-24 22:18 ` Greg Kroah-Hartman
2013-07-02 15:31 ` [PATCH 3/5] SLIP: Prevent recursion stack overflow and scheduler crash Dean Jenkins
2013-07-25 1:12 ` Peter Hurley
2013-07-02 15:31 ` Dean Jenkins [this message]
2013-07-24 22:18 ` [PATCH 4/5] SLIP: Add error message for xleft non-zero Greg Kroah-Hartman
2013-07-24 22:41 ` Paul Bolle
2013-07-02 15:31 ` [PATCH 5/5] SLIP: Fix transmission segmentation mechanism Dean Jenkins
2013-07-24 22:18 ` Greg Kroah-Hartman
2013-07-25 0:13 ` Peter Hurley
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