From 04dbc09b255ec0be67e6b0f7bf114675ac143cd9 Mon Sep 17 00:00:00 2001 From: David Kershner Date: Tue, 18 Apr 2017 16:55:06 -0400 Subject: [PATCH] staging: unisys: visorbus: add timeout to controlvm_periodic_work Limit the amount that gets pulled from the queue on each try so we don't get stuck in an infinite loop if something has gone wrong with the s-Par firmware. Signed-off-by: David Kershner Reviewed-by: Tim Sell Signed-off-by: Greg Kroah-Hartman --- drivers/staging/unisys/visorbus/visorchipset.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/staging/unisys/visorbus/visorchipset.c b/drivers/staging/unisys/visorbus/visorchipset.c index 5cbc69ff3381..67583692d958 100644 --- a/drivers/staging/unisys/visorbus/visorchipset.c +++ b/drivers/staging/unisys/visorbus/visorchipset.c @@ -1785,6 +1785,7 @@ static void controlvm_periodic_work(struct work_struct *work) { struct controlvm_message inmsg; + int count = 0; int err; /* Drain the RESPONSE queue make it empty */ @@ -1792,7 +1793,7 @@ controlvm_periodic_work(struct work_struct *work) err = visorchannel_signalremove(chipset_dev->controlvm_channel, CONTROLVM_QUEUE_RESPONSE, &inmsg); - } while (!err); + } while ((!err) && (++count < CONTROLVM_MESSAGE_MAX)); if (err != -EAGAIN) goto schedule_out; -- 2.20.1