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um: Fix uml_mconsole stop/go

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commit 1a3a6a2a03 upstream.

Moving to an EPOLL based IRQ controller broke uml_mconsole stop/go
commands. This fixes it and restores stop/go functionality.

Fixes: ff6a17989c ("Epoll based IRQ controller")
Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Anton Ivanov 2022-02-22 12:44:10 +00:00 • committed by Justin Hammond
parent 68be75655c
commit 9d94f8cfae
1 changed files with 2 additions and 1 deletions
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3
arch/um/drivers/mconsole_kern.c
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@ -224,7 +224,7 @@ void mconsole_go(struct mc_request *req)
void mconsole_stop(struct mc_request *req)
{
deactivate_fd(req->originating_fd, MCONSOLE_IRQ);
block_signals();
os_set_fd_block(req->originating_fd, 1);
mconsole_reply(req, "stopped", 0, 0);
for (;;) {
@ -247,6 +247,7 @@ void mconsole_stop(struct mc_request *req)
}
os_set_fd_block(req->originating_fd, 0);
mconsole_reply(req, "", 0, 0);
unblock_signals();
}
static DEFINE_SPINLOCK(mc_devices_lock);