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Date: Tue, 5 Apr 2022 09:32:39 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Anton Ivanov <anton.ivanov@...bridgegreys.com>, Richard Weinberger <richard@....at> Subject: [PATCH 5.15 897/913] um: Fix uml_mconsole stop/go From: Anton Ivanov <anton.ivanov@...bridgegreys.com> commit 1a3a6a2a035bb6c3a7ef4c788d8fd69a7b2d6284 upstream. Moving to an EPOLL based IRQ controller broke uml_mconsole stop/go commands. This fixes it and restores stop/go functionality. Fixes: ff6a17989c08 ("Epoll based IRQ controller") Signed-off-by: Anton Ivanov <anton.ivanov@...bridgegreys.com> Signed-off-by: Richard Weinberger <richard@....at> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- arch/um/drivers/mconsole_kern.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -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 *re } os_set_fd_block(req->originating_fd, 0); mconsole_reply(req, "", 0, 0); + unblock_signals(); } static DEFINE_SPINLOCK(mc_devices_lock);
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