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authorKarol Swietlicki <magotari@gmail.com>2008-02-04 22:31:25 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 09:44:31 -0800
commitcc0be0fb3fd4bd2c363ef1b5c968cd6f2ce478cf (patch)
tree19a4a1127fed020ec1c08264117517e49ddad0ea
parentab26a5276c1b0945c3281a73b3a89d025906c880 (diff)
downloadop-kernel-dev-cc0be0fb3fd4bd2c363ef1b5c968cd6f2ce478cf.zip
op-kernel-dev-cc0be0fb3fd4bd2c363ef1b5c968cd6f2ce478cf.tar.gz
uml: fix infinite mconsole loop
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>
-rw-r--r--arch/um/drivers/mconsole_kern.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index c953e14..949037e 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -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) {
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