From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: [PATCH 2/6] mmc: Fix incorrect warning when setting 0 Hz via debugfs Date: Tue, 23 Sep 2014 23:00:26 +0300 Message-ID: <1411502430-25535-3-git-send-email-adrian.hunter@intel.com> References: <1411502430-25535-1-git-send-email-adrian.hunter@intel.com> Return-path: Received: from mga14.intel.com ([192.55.52.115]:41324 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755830AbaIWUB5 (ORCPT ); Tue, 23 Sep 2014 16:01:57 -0400 In-Reply-To: <1411502430-25535-1-git-send-email-adrian.hunter@intel.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Ulf Hansson , Chris Ball Cc: linux-mmc It is possible to turn off the card clock by setting the frequency to zero via debugfs e.g. echo 0 > /sys/kernel/debug/mmc0/clock However that produces an incorrect warning that is designed to warn if the frequency is below the minimum operating frequency. So correct the warning. Signed-off-by: Adrian Hunter --- drivers/mmc/core/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index e2e1dd4..16aa7bd 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -995,7 +995,7 @@ void mmc_set_chip_select(struct mmc_host *host, int mode) */ static void __mmc_set_clock(struct mmc_host *host, unsigned int hz) { - WARN_ON(hz < host->f_min); + WARN_ON(hz && hz < host->f_min); if (hz > host->f_max) hz = host->f_max; -- 1.8.3.2