diff options
Diffstat (limited to 'arch/um/drivers/mconsole_kern.c')
| -rw-r--r-- | arch/um/drivers/mconsole_kern.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index d08bd036ccb842..7b172160fe0415 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -79,7 +79,7 @@ static irqreturn_t mconsole_interrupt(int irq, void *dev_id) /* long to avoid size mismatch warnings from gcc */ long fd; struct mconsole_entry *new; - struct mc_request req; + static struct mc_request req; /* that's OK */ fd = (long) dev_id; while (mconsole_get_request(fd, &req)){ @@ -91,6 +91,7 @@ static irqreturn_t mconsole_interrupt(int irq, void *dev_id) mconsole_reply(&req, "Out of memory", 1, 0); else { new->request = req; + new->request.regs = get_irq_regs()->regs; list_add(&new->list, &mc_requests); } } @@ -314,9 +315,21 @@ 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, "", 0, 0); - while(mconsole_get_request(req->originating_fd, req)){ - if(req->cmd->handler == mconsole_go) break; + mconsole_reply(req, "stopped", 0, 0); + while (mconsole_get_request(req->originating_fd, req)) { + if (req->cmd->handler == mconsole_go) + break; + if (req->cmd->handler == mconsole_stop) { + mconsole_reply(req, "Already stopped", 1, 0); + continue; + } + if (req->cmd->handler == mconsole_sysrq) { + struct pt_regs *old_regs; + old_regs = set_irq_regs((struct pt_regs *)&req->regs); + mconsole_sysrq(req); + set_irq_regs(old_regs); + continue; + } (*req->cmd->handler)(req); } os_set_fd_block(req->originating_fd, 0); @@ -673,9 +686,7 @@ static void with_console(struct mc_request *req, void (*proc)(void *), static void sysrq_proc(void *arg) { char *op = arg; - struct pt_regs *old_regs = set_irq_regs(¤t->thread.regs); handle_sysrq(*op, NULL); - set_irq_regs(old_regs); } void mconsole_sysrq(struct mc_request *req) |