From d84aeddee7911c9df739bad58c72189ac336f23f Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@gmx.de>
Date: Sun, 16 Jun 2013 06:16:43 +0200
Subject: devmnt: add debug print for convS2M failing, suspecting this causing
 zero length writes

---
 sys/src/9/port/devmnt.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'sys/src')

diff --git a/sys/src/9/port/devmnt.c b/sys/src/9/port/devmnt.c
index da51d0366..926b6ee61 100644
--- a/sys/src/9/port/devmnt.c
+++ b/sys/src/9/port/devmnt.c
@@ -794,8 +794,12 @@ mountio(Mnt *m, Mntrpc *r)
 	if(m->msize == 0)
 		panic("msize");
 	n = convS2M(&r->request, r->rpc, m->msize);
-	if(n < 0)
-		panic("bad message type in mountio");
+	if(n <= 0){
+		print("mountio: proc %s %lud: convS2M returned %d for tag %d fid %d T%d\n",
+			up->text, up->pid, n, r->request.tag, r->request.fid, r->request.type);
+		error(Emountrpc);
+	}
+		
 	if(devtab[m->c->type]->write(m->c, r->rpc, n, 0) != n)
 		error(Emountrpc);
 	r->stime = fastticks(nil);
-- 
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