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uml: fix mconsole stop 

Bring back the functionality of stopping user mode linux with the help of
mconsole.

[jdike - the bug being fixed is that the mconsole file descriptor is already
set O_NONBLOCK or not, depending on whether we want no blocking (the normal
case) or we want blocking (when an mconsole stop is in effect), so the
MSG_DONTWAIT is redundant in the normal case, and wrong when we want to
block.]

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>
This commit is contained in:
Karol Swietlicki 2008-02-04 22:31:04 -08:00 committed by Linus Torvalds
parent 2dc5802a22
commit 7b5cc6ee6c
1 changed files with 2 additions and 3 deletions
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5
arch/um/drivers/mconsole_user.c
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@ -83,9 +83,8 @@ int mconsole_get_request(int fd, struct mc_request *req)
int len;
req->originlen = sizeof(req->origin);
req->len = recvfrom(fd, &req->request, sizeof(req->request),
MSG_DONTWAIT, (struct sockaddr *) req->origin,
&req->originlen);
req->len = recvfrom(fd, &req->request, sizeof(req->request), 0,
(struct sockaddr *) req->origin, &req->originlen);
if (req->len < 0)
return 0;