Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756185Ab3FGPtb (ORCPT ); Fri, 7 Jun 2013 11:49:31 -0400 Received: from mail.free-electrons.com ([94.23.35.102]:50229 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756018Ab3FGPt1 (ORCPT ); Fri, 7 Jun 2013 11:49:27 -0400 From: Gregory CLEMENT To: Wolfram Sang , linux-i2c@vger.kernel.org Cc: Thomas Petazzoni , Ezequiel Garcia , Sebastian Hesselbarth , linux-arm-kernel@lists.infradead.org, Jason Cooper , Andrew Lunn , Gregory CLEMENT , Nicolas Pitre , Lior Amsalem , Maen Suleiman , Tawfik Bayouk , Shadi Ammouri , Eran Ben-Avi , Yehuda Yitschak , Nadav Haklai , Ike Pan , Chris Van Hoof , Dan Frazier , Leif Lindholm , Jon Masters , David Marlin , linux-kernel@vger.kernel.org, Zbigniew Bodek Subject: [PATCH 2/2] i2c-mv64xxx: Abort the mv64xxx_of_config if clock-frequency is not provided Date: Fri, 7 Jun 2013 17:49:00 +0200 Message-Id: <1370620140-17177-3-git-send-email-gregory.clement@free-electrons.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1370620140-17177-1-git-send-email-gregory.clement@free-electrons.com> References: <1370620140-17177-1-git-send-email-gregory.clement@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1349 Lines: 37 From: Zbigniew Bodek This commit adds checking whether clock-frequency property acquisition has succeeded. Do not waste time to find baud factors if there is no information about the desired bus frequency in dts. [gregory.clement@free-electrons.com: Reword the commit log] Signed-off-by: Gregory CLEMENT Signed-off-by: Zbigniew Bodek --- drivers/i2c/busses/i2c-mv64xxx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index 60cac9f..88c2dd0 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -593,7 +593,9 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data, goto out; } tclk = clk_get_rate(drv_data->clk); - of_property_read_u32(np, "clock-frequency", &bus_freq); + if ((rc = of_property_read_u32(np, "clock-frequency", &bus_freq)) != 0) + goto out; + if (!mv64xxx_find_baud_factors(bus_freq, tclk, &drv_data->freq_n, &drv_data->freq_m)) { rc = -EINVAL; -- 1.8.1.2 -- 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/