uml: fix infinite mconsole loop
authorKarol Swietlicki <magotari@gmail.com>
Tue, 5 Feb 2008 06:31:25 +0000 (22:31 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 5 Feb 2008 17:44:31 +0000 (09:44 -0800)
This patch takes care of a problem with the stopping code.

The function inside the while condition returns 0 to signify a problem.  A
problem could be for example a bad command or a bad version of the mconsole
client.  A bad command would terminate the stopping loop and resume the
kernel.  This is a problem.

A better solution is to make the loop infinite and don't leave it until we are
explicitly told to.

Signed-off-by: Karol Swietlicki <magotari@gmail.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/um/drivers/mconsole_kern.c

index c953e1477be4144efe727b7dfd4e34b90be89f38..949037e92a7b27487b5034ac29dc1e580116166a 100644 (file)
@@ -305,7 +305,9 @@ void mconsole_stop(struct mc_request *req)
        deactivate_fd(req->originating_fd, MCONSOLE_IRQ);
        os_set_fd_block(req->originating_fd, 1);
        mconsole_reply(req, "stopped", 0, 0);
-       while (mconsole_get_request(req->originating_fd, req)) {
+       for (;;) {
+               if (!mconsole_get_request(req->originating_fd, req))
+                       continue;
                if (req->cmd->handler == mconsole_go)
                        break;
                if (req->cmd->handler == mconsole_stop) {