Path: csiph.com!aioe.org!bofh.it!news.nic.it!robomod From: Greg Kroah-Hartman Newsgroups: linux.kernel Subject: [PATCH 4.1 34/65] mei: txe: reduce suspend/resume time Date: Sun, 19 Jul 2015 21:20:03 +0200 Message-ID: References: X-Original-To: linux-kernel@vger.kernel.org X-Mailer: git-send-email 2.4.6 User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: robomod@news.nic.it List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Approved: robomod@news.nic.it Lines: 73 Organization: linux.* mail to news gateway X-Original-Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tomas Winkler , Barak Yoresh X-Original-Date: Sun, 19 Jul 2015 12:07:53 -0700 X-Original-Message-ID: <20150719190810.584119630@linuxfoundation.org> X-Original-References: <20150719190809.469715936@linuxfoundation.org> X-Original-Sender: linux-kernel-owner@vger.kernel.org Xref: aioe.org linux.kernel:1187767 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tomas Winkler commit fe292283c23329218e384bffc6cb4bfa3fd92277 upstream. HW has to be in known state before the initialisation sequence is started. The polling step for settling aliveness was set to 200ms while in practise this can be done in up to 30msecs. Signed-off-by: Tomas Winkler Signed-off-by: Barak Yoresh Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hw-txe.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) --- a/drivers/misc/mei/hw-txe.c +++ b/drivers/misc/mei/hw-txe.c @@ -16,6 +16,7 @@ #include #include +#include #include #include #include @@ -218,26 +219,25 @@ static u32 mei_txe_aliveness_get(struct * * Polls for HICR_HOST_ALIVENESS_RESP.ALIVENESS_RESP to be set * - * Return: > 0 if the expected value was received, -ETIME otherwise + * Return: 0 if the expected value was received, -ETIME otherwise */ static int mei_txe_aliveness_poll(struct mei_device *dev, u32 expected) { struct mei_txe_hw *hw = to_txe_hw(dev); - int t = 0; + ktime_t stop, start; + start = ktime_get(); + stop = ktime_add(start, ms_to_ktime(SEC_ALIVENESS_WAIT_TIMEOUT)); do { hw->aliveness = mei_txe_aliveness_get(dev); if (hw->aliveness == expected) { dev->pg_event = MEI_PG_EVENT_IDLE; - dev_dbg(dev->dev, - "aliveness settled after %d msecs\n", t); - return t; + dev_dbg(dev->dev, "aliveness settled after %lld usecs\n", + ktime_to_us(ktime_sub(ktime_get(), start))); + return 0; } - mutex_unlock(&dev->device_lock); - msleep(MSEC_PER_SEC / 5); - mutex_lock(&dev->device_lock); - t += MSEC_PER_SEC / 5; - } while (t < SEC_ALIVENESS_WAIT_TIMEOUT); + usleep_range(20, 50); + } while (ktime_before(ktime_get(), stop)); dev->pg_event = MEI_PG_EVENT_IDLE; dev_err(dev->dev, "aliveness timed out\n"); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/