devmnt: add debug print for convS2M failing, suspecting this causing zero length...

[plan9front.git] / sys / src / 9 / port / devmnt.c

diff --git a/sys/src/9/port/devmnt.c b/sys/src/9/port/devmnt.c
index da51d03667b2190e7bce9cfa969bfb3e546e574f..926b6ee61824f6876646188bdb837b623b31a11f 100644 (file)
--- 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);