From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760693AbcHaN3Z (ORCPT ); Wed, 31 Aug 2016 09:29:25 -0400 Received: from nat-hk.nvidia.com ([203.18.50.4]:57172 "EHLO hkmmgate102.nvidia.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S934346AbcHaN3U (ORCPT ); Wed, 31 Aug 2016 09:29:20 -0400 X-PGP-Universal: processed; by hkpgpgate101.nvidia.com on Wed, 31 Aug 2016 06:29:12 -0700 From: Shardar Shariff Md To: , , , , , , , , , Subject: [PATCH v11 4/5] i2c: tegra: use atomic poll function during configuration Date: Wed, 31 Aug 2016 18:58:43 +0530 Message-ID: <1472650124-5702-4-git-send-email-smohammed@nvidia.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1472650124-5702-1-git-send-email-smohammed@nvidia.com> References: <1472650124-5702-1-git-send-email-smohammed@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use readl_poll_timeout_atomic() function as *wait_for_config_load() function can be called from interrupt context. Signed-off-by: Shardar Shariff Md --- Changes in v10: - Rebase on top of [PATCH V2 0/9] Some Tegra I2C Updates Changes in v11: - Fix checkpatch error of using in_atomic() API --- --- drivers/i2c/busses/i2c-tegra.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index daab0ce..2437535 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -457,8 +457,13 @@ static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev) reg_offset = tegra_i2c_reg_addr(i2c_dev, I2C_CONFIG_LOAD); addr = i2c_dev->base + reg_offset; i2c_writel(i2c_dev, I2C_MSTR_CONFIG_LOAD, I2C_CONFIG_LOAD); - err = readl_poll_timeout(addr, val, val == 0, 1000, - I2C_CONFIG_LOAD_TIMEOUT); + if (in_interrupt()) + err = readl_poll_timeout_atomic(addr, val, val == 0, + 1000, I2C_CONFIG_LOAD_TIMEOUT); + else + err = readl_poll_timeout(addr, val, val == 0, + 1000, I2C_CONFIG_LOAD_TIMEOUT); + if (err) { dev_warn(i2c_dev->dev, "timeout waiting for config load\n"); -- 1.8.1.5