From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3253AC76194 for ; Thu, 25 Jul 2019 15:15:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E783922C97 for ; Thu, 25 Jul 2019 15:15:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="IrRWQG9Q" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388615AbfGYPPy (ORCPT ); Thu, 25 Jul 2019 11:15:54 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:60772 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388736AbfGYPPy (ORCPT ); Thu, 25 Jul 2019 11:15:54 -0400 Received: from eucas1p1.samsung.com (unknown [182.198.249.206]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20190725151551euoutp0194f3672b8f5a23d2cea129e93fa62559~0r1U973CK1991619916euoutp019 for ; Thu, 25 Jul 2019 15:15:51 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20190725151551euoutp0194f3672b8f5a23d2cea129e93fa62559~0r1U973CK1991619916euoutp019 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1564067751; bh=agewonXrWwhUtSxSzdJEA96UwZdMKX8h25eDIpRixpY=; h=Subject:To:Cc:From:Date:In-Reply-To:References:From; b=IrRWQG9Que18m81jBN/zhTmZv5KsVV/i+nV3wZzoQ5m+PHyrrpTiPmSJBesi4tBrF 3KOPG6ZZm/uwyM4Bgxh9IS1yKo0G02u5UxlAiCcsQcfc/tW3lzAtxUGpzDUTHgb//G HBJn3Vpimsq1Er2COy2YY7F7TNfTAoI89gkraBC0= Received: from eusmges3new.samsung.com (unknown [203.254.199.245]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20190725151550eucas1p222573bce7c0681fb4325cef64de50d78~0r1UMPTRp0329203292eucas1p2i; Thu, 25 Jul 2019 15:15:50 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges3new.samsung.com (EUCPMTA) with SMTP id FF.15.04325.5A7C93D5; Thu, 25 Jul 2019 16:15:49 +0100 (BST) Received: from eusmtrp2.samsung.com (unknown [182.198.249.139]) by eucas1p1.samsung.com (KnoxPortal) with ESMTPA id 20190725151549eucas1p19905f65c96d190e25d8e6ab1a9384d6a~0r1TTP00W1182111821eucas1p1Q; Thu, 25 Jul 2019 15:15:49 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20190725151549eusmtrp2364226c69972dc591d61e89a3ce8be8c~0r1TFB4Ze0673606736eusmtrp2h; Thu, 25 Jul 2019 15:15:49 +0000 (GMT) X-AuditID: cbfec7f5-b8fff700000010e5-fa-5d39c7a57551 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 25.F9.04140.5A7C93D5; Thu, 25 Jul 2019 16:15:49 +0100 (BST) Received: from [106.120.51.18] (unknown [106.120.51.18]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20190725151548eusmtip105bff170fec204f620580b172a620d70~0r1SWBaq12193221932eusmtip1U; Thu, 25 Jul 2019 15:15:48 +0000 (GMT) Subject: Re: [PATCH v3 3/5] devfreq: exynos-bus: convert to use dev_pm_opp_set_rate() To: cwchoi00@gmail.com Cc: Chanwoo Choi , Bartlomiej Zolnierkiewicz , Marek Szyprowski , Krzysztof Kozlowski , Kukjin Kim , Kyungmin Park , Mark Rutland , MyungJoo Ham , Nishanth Menon , Rob Herring , Stephen Boyd , Viresh Kumar , devicetree , linux-arm-kernel , linux-kernel , Linux PM list , linux-samsung-soc From: Kamil Konieczny Message-ID: <4f62d397-0f62-f81d-8b76-b73c6fbee93d@partner.samsung.com> Date: Thu, 25 Jul 2019 17:15:47 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA02SWUwTURSGubN0hkrxUhdOwCVpolER1KjxooS4EOwDicuLK8ogE0CgklYE 5UFARCURlwTBSkCCWyqKVCibgmKlCrKlIKhgUFATkQcFgsomw0Dk7Tv/Wf77J5en1d9YNz5c d1zU64RIjULJWGr+NHjesXkHru5wJIWZBSxpG/jGkq8vPUiOtYEll7p7adLY+Igj9Uk/OGLu fssSe3mWgvRftCKS2VhJkQfWTo7cbmumyIfEewry43c9Rc4+tXJk7G0hQx531Sg2q7X52flI W2bs5LRm0wWF9vGt09q0IhPS2tpLKG2/edFObr/SJ0SMDD8h6lf5BinDLhckUtEPguM+vUxg E1CdNhU58oDXQXpCGpWKlLwa30NgMg1OFQMILEMNU0U/gsKsNG56pTarnZVYje8iuJ4cLXMf gswSkHgO3gPn8i5MzszF86HkWg+SDtG4iYW+R1UKqaHAG+BzyRtKYhX2h+bniZPM4CVwy57M SDwP74VfXS9YecYFXl/vmdQd8S7I+5uCJKaxK7zvyaFkXgxnim/QkhngKzxkvBuZMOMnCj8Y zfeTA8yB77aiqTALYLxM3gUcC19ypZDSbjKCrnM/GbmxCV7YmlnpDo2XQ0H5KlneAm0VNiSf d4b2Phf5Cc5w1ZJBy7IKzqeo5WlPyB5/w8rsDqnjD9nLSGOcEcw4I4xxRhjjf9+biDEhVzHG EBUqGtbqxFgvgxBliNGFeh05FmVGE9+vbsw2WIoqR4KrEeaRxkm1zOQdqGaFE4aTUdUIeFoz V1VcOiGpQoSTp0T9scP6mEjRUI3ceUbjqop36DqgxqHCcTFCFKNF/XSX4h3dEhDj2fIuyVPH c60dAf17nFrzY6OZ9Utzq+w5QrZ4qHfgSZOHxSfwYFxpeeKG2H3p9tltm+/rA5/VL4jAyz8m D78K6LVvtTZ5v99urAh77VzO7Q5oEfxXbskN7cCllucOOeaybb7dDhtrg0aDRgZVPiELL+6I dx8+OpSqrO1snVV7UMMYwoQ1K2i9QfgHqsX5I3oDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrLIsWRmVeSWpSXmKPExsVy+t/xu7pLj1vGGhzfz22xccZ6VovrX56z Wjw7qm0x/8g5Vov+x6+ZLc6f38BucbbpDbvFpsfXWC0u75rDZvG59wijxYzz+5gs1h65y26x 9PpFJovbjSvYLN78OMtk0br3CLvFv2sbWSw2PzjG5iDksWbeGkaPnbPusntsWtXJ5rF5Sb1H 35ZVjB7Hb2xn8vi8SS6APUrPpii/tCRVISO/uMRWKdrQwkjP0NJCz8jEUs/Q2DzWyshUSd/O JiU1J7MstUjfLkEvY8L6RqaCtUkVD482sDYwnvboYuTkkBAwkTg15wZrFyMXh5DAUkaJe8/O MEMkpCUaT69mgrCFJf5c62IDsYUEXjNKnO2qBbGFBcIl2hd3soLYIgJiEtunPWEEGcQscIVV 4tDJTmaIqT3MEiverQCrYhMwl3i0/QzYVF4BN4mLBxvBbBYBVYkll1tYQGxRgQiJwztmMULU CEqcnPkELM4pECix+FcbWJxZQF3iz7xLzBC2uMStJ/OZIGx5ieats5knMArNQtI+C0nLLCQt s5C0LGBkWcUoklpanJueW2ykV5yYW1yal66XnJ+7iREY9duO/dyyg7HrXfAhRgEORiUe3gvL LWOFWBPLiitzDzFKcDArifBu3QEU4k1JrKxKLcqPLyrNSS0+xGgK9NxEZinR5HxgQsoriTc0 NTS3sDQ0NzY3NrNQEuftEDgYIySQnliSmp2aWpBaBNPHxMEp1cC4kI/DOL7JKkzI4N7r7df2 cQTXneH9c3jZtPa+jGO/V7C/Wi+tpS7Sz/n3RmS/etitE6euHJ0kdIrFne39zssWJQFaNZef nVxnMX3CVsm+U05fD2tWPC18zbnRpOqVbeDKa3M/hVzZuNHg1/lFDq8j39nEFNx5HBWc3qce wu1k0Ln86he2t46PlFiKMxINtZiLihMBlC7u7BADAAA= X-CMS-MailID: 20190725151549eucas1p19905f65c96d190e25d8e6ab1a9384d6a X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20190719150555eucas1p197adc3c58e45c53137fd70cadbfae60e X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190719150555eucas1p197adc3c58e45c53137fd70cadbfae60e References: <20190719150535.15501-1-k.konieczny@partner.samsung.com> <20190719150535.15501-4-k.konieczny@partner.samsung.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Hi, On 25.07.2019 16:53, Chanwoo Choi wrote: > 2019년 7월 25일 (목) 오후 11:19, Kamil Konieczny > 님이 작성: >> >> Hi Chanwoo, >> >> On 25.07.2019 12:17, Chanwoo Choi wrote: >>> Hi Kamil, >>> >>> Looks good to me. But, I have some comment. Please check them. >> >> Thank you for review, please see answers below. >> >>> After this patch, exynos_bus_target is perfectly same with >>> exynos_bus_passive_target. The exynos_bus_passive_target() could be removed. >> >> Ok, I will make it in separate patch to simplify review process. > > I think you can just modify this patch without any separate patch. Do you want me to send v5 with patch 5 squashed in patch 3 ? >>> On 19. 7. 20. 오전 12:05, k.konieczny@partner.samsung.com wrote: >>>> Reuse opp core code for setting bus clock and voltage. As a side >>>> effect this allow useage of coupled regulators feature (required >>> >>> s/useage/usage ? >> >> Good catch, I will change it. >> >>>> for boards using Exynos5422/5800 SoCs) because dev_pm_opp_set_rate() >>>> uses regulator_set_voltage_triplet() for setting regulator voltage >>>> while the old code used regulator_set_voltage_tol() with fixed >>>> tolerance. This patch also removes no longer needed parsing of DT >>>> property "exynos,voltage-tolerance" (no Exynos devfreq DT node uses >>>> it). >>>> >>>> Signed-off-by: Kamil Konieczny >>>> --- >>>> drivers/devfreq/exynos-bus.c | 143 +++++++++-------------------------- >>>> 1 file changed, 37 insertions(+), 106 deletions(-) >>>> >>>> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c >>>> index f391044aa39d..c2147b0912a0 100644 >>>> --- a/drivers/devfreq/exynos-bus.c >>>> +++ b/drivers/devfreq/exynos-bus.c >>>> @@ -25,7 +25,6 @@ >>>> #include >>>> >>>> #define DEFAULT_SATURATION_RATIO 40 >>>> -#define DEFAULT_VOLTAGE_TOLERANCE 2 >>>> >>>> struct exynos_bus { >>>> struct device *dev; >>>> @@ -37,9 +36,9 @@ struct exynos_bus { >>>> >>>> unsigned long curr_freq; >>>> >>>> - struct regulator *regulator; >>>> + struct opp_table *opp_table; >>>> + >>>> struct clk *clk; >>>> - unsigned int voltage_tolerance; >>>> unsigned int ratio; >>>> }; >>>> >>>> @@ -99,56 +98,23 @@ static int exynos_bus_target(struct device *dev, unsigned long *freq, u32 flags) >>>> { >>>> struct exynos_bus *bus = dev_get_drvdata(dev); >>>> struct dev_pm_opp *new_opp; >>>> - unsigned long old_freq, new_freq, new_volt, tol; >>>> int ret = 0; >>>> >>>> - /* Get new opp-bus instance according to new bus clock */ >>>> + /* Get correct frequency for bus. */ >>>> new_opp = devfreq_recommended_opp(dev, freq, flags); >>>> if (IS_ERR(new_opp)) { >>>> dev_err(dev, "failed to get recommended opp instance\n"); >>>> return PTR_ERR(new_opp); >>>> } >>>> >>>> - new_freq = dev_pm_opp_get_freq(new_opp); >>>> - new_volt = dev_pm_opp_get_voltage(new_opp); >>>> dev_pm_opp_put(new_opp); >>>> >>>> - old_freq = bus->curr_freq; >>>> - >>>> - if (old_freq == new_freq) >>>> - return 0; >>>> - tol = new_volt * bus->voltage_tolerance / 100; >>>> - >>>> /* Change voltage and frequency according to new OPP level */ >>>> mutex_lock(&bus->lock); >>>> + ret = dev_pm_opp_set_rate(dev, *freq); >>>> + if (!ret) >>>> + bus->curr_freq = *freq; >>>> >>>> - if (old_freq < new_freq) { >>>> - ret = regulator_set_voltage_tol(bus->regulator, new_volt, tol); >>>> - if (ret < 0) { >>>> - dev_err(bus->dev, "failed to set voltage\n"); >>>> - goto out; >>>> - } >>>> - } >>>> - >>>> - ret = clk_set_rate(bus->clk, new_freq); >>>> - if (ret < 0) { >>>> - dev_err(dev, "failed to change clock of bus\n"); >>>> - clk_set_rate(bus->clk, old_freq); >>>> - goto out; >>>> - } >>>> - >>>> - if (old_freq > new_freq) { >>>> - ret = regulator_set_voltage_tol(bus->regulator, new_volt, tol); >>>> - if (ret < 0) { >>>> - dev_err(bus->dev, "failed to set voltage\n"); >>>> - goto out; >>>> - } >>>> - } >>>> - bus->curr_freq = new_freq; >>>> - >>>> - dev_dbg(dev, "Set the frequency of bus (%luHz -> %luHz, %luHz)\n", >>>> - old_freq, new_freq, clk_get_rate(bus->clk)); >>>> -out: >>>> mutex_unlock(&bus->lock); >>>> >>>> return ret; >>>> @@ -195,8 +161,8 @@ static void exynos_bus_exit(struct device *dev) >>>> dev_warn(dev, "failed to disable the devfreq-event devices\n"); >>>> >>>> clk_disable_unprepare(bus->clk); >>>> - if (bus->regulator) >>>> - regulator_disable(bus->regulator); >>>> + if (bus->opp_table) >>>> + dev_pm_opp_put_regulators(bus->opp_table); >>>> >>>> dev_pm_opp_of_remove_table(dev); >>>> } >>>> @@ -209,39 +175,23 @@ static int exynos_bus_passive_target(struct device *dev, unsigned long *freq, >>>> { >>>> struct exynos_bus *bus = dev_get_drvdata(dev); >>>> struct dev_pm_opp *new_opp; >>>> - unsigned long old_freq, new_freq; >>>> - int ret = 0; >>>> + int ret; >>>> >>>> - /* Get new opp-bus instance according to new bus clock */ >>>> + /* Get correct frequency for bus. */ >>>> new_opp = devfreq_recommended_opp(dev, freq, flags); >>>> if (IS_ERR(new_opp)) { >>>> dev_err(dev, "failed to get recommended opp instance\n"); >>>> return PTR_ERR(new_opp); >>>> } >>>> >>>> - new_freq = dev_pm_opp_get_freq(new_opp); >>>> dev_pm_opp_put(new_opp); >>>> >>>> - old_freq = bus->curr_freq; >>>> - >>>> - if (old_freq == new_freq) >>>> - return 0; >>>> - >>>> /* Change the frequency according to new OPP level */ >>>> mutex_lock(&bus->lock); >>>> + ret = dev_pm_opp_set_rate(dev, *freq); >>>> + if (!ret) >>>> + bus->curr_freq = *freq; >>>> >>>> - ret = clk_set_rate(bus->clk, new_freq); >>>> - if (ret < 0) { >>>> - dev_err(dev, "failed to set the clock of bus\n"); >>>> - goto out; >>>> - } >>>> - >>>> - *freq = new_freq; >>>> - bus->curr_freq = new_freq; >>>> - >>>> - dev_dbg(dev, "Set the frequency of bus (%luHz -> %luHz, %luHz)\n", >>>> - old_freq, new_freq, clk_get_rate(bus->clk)); >>>> -out: >>>> mutex_unlock(&bus->lock); >>>> >>>> return ret; >>>> @@ -259,20 +209,9 @@ static int exynos_bus_parent_parse_of(struct device_node *np, >>>> struct exynos_bus *bus) >>>> { >>>> struct device *dev = bus->dev; >>>> - int i, ret, count, size; >>>> - >>>> - /* Get the regulator to provide each bus with the power */ >>>> - bus->regulator = devm_regulator_get(dev, "vdd"); >>>> - if (IS_ERR(bus->regulator)) { >>>> - dev_err(dev, "failed to get VDD regulator\n"); >>>> - return PTR_ERR(bus->regulator); >>>> - } >>>> - >>>> - ret = regulator_enable(bus->regulator); >>>> - if (ret < 0) { >>>> - dev_err(dev, "failed to enable VDD regulator\n"); >>>> - return ret; >>>> - } >>>> + struct opp_table *opp_table; >>>> + const char *vdd = "vdd"; >>>> + int i, count, size; >>>> >>>> /* >>>> * Get the devfreq-event devices to get the current utilization of >>>> @@ -281,26 +220,29 @@ static int exynos_bus_parent_parse_of(struct device_node *np, >>>> count = devfreq_event_get_edev_count(dev); >>>> if (count < 0) { >>>> dev_err(dev, "failed to get the count of devfreq-event dev\n"); >>>> - ret = count; >>>> - goto err_regulator; >>>> + return count; >>>> } >>>> - bus->edev_count = count; >>>> >>>> + bus->edev_count = count; >>>> size = sizeof(*bus->edev) * count; >>>> bus->edev = devm_kzalloc(dev, size, GFP_KERNEL); >>>> - if (!bus->edev) { >>>> - ret = -ENOMEM; >>>> - goto err_regulator; >>>> - } >>>> + if (!bus->edev) >>>> + return -ENOMEM; >>>> >>>> for (i = 0; i < count; i++) { >>>> bus->edev[i] = devfreq_event_get_edev_by_phandle(dev, i); >>>> - if (IS_ERR(bus->edev[i])) { >>>> - ret = -EPROBE_DEFER; >>>> - goto err_regulator; >>>> - } >>>> + if (IS_ERR(bus->edev[i])) >>>> + return -EPROBE_DEFER; >>>> + } >>>> + >>>> + opp_table = dev_pm_opp_set_regulators(dev, &vdd, 1); >>>> + if (IS_ERR(opp_table)) { >>>> + i = PTR_ERR(opp_table); >>>> + dev_err(dev, "failed to set regulators %d\n", i); >>>> + return i; >>> >>> Maybe, you just used the 'i' defined variable instead of adding >>> new variable. But, I think that you better to add new variable >>> like 'err' for the readability. Or, jut use the 'PTR_ERR(opp_table)' >>> directly without any additional variable. >> >> I will remove not related changes, so here I will reuse 'ret' variable. >> >>>> } >>>> >>>> + bus->opp_table = opp_table; >>> >>> Add blank line. >> >> OK >> >>>> /* >>>> * Optionally, Get the saturation ratio according to Exynos SoC >>>> * When measuring the utilization of each AXI bus with devfreq-event >>>> @@ -314,16 +256,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np, >>>> if (of_property_read_u32(np, "exynos,saturation-ratio", &bus->ratio)) >>>> bus->ratio = DEFAULT_SATURATION_RATIO; >>>> >>>> - if (of_property_read_u32(np, "exynos,voltage-tolerance", >>>> - &bus->voltage_tolerance)) >>>> - bus->voltage_tolerance = DEFAULT_VOLTAGE_TOLERANCE; >>>> - >>>> return 0; >>>> - >>>> -err_regulator: >>>> - regulator_disable(bus->regulator); >>>> - >>>> - return ret; >>>> } >>>> >>>> static int exynos_bus_parse_of(struct exynos_bus *bus) >>>> @@ -414,12 +347,8 @@ static int exynos_bus_probe(struct platform_device *pdev) >>>> >>>> /* Parse the device-tree to get the resource information */ >>>> ret = exynos_bus_parse_of(bus); >>>> - if (ret < 0) { >>>> - if (!passive) >>>> - regulator_disable(bus->regulator); >>>> - >>>> - return ret; >>>> - } >>>> + if (ret < 0) >>>> + goto err_reg; >>>> >>>> if (passive) >>>> goto passive; >>>> @@ -512,10 +441,12 @@ static int exynos_bus_probe(struct platform_device *pdev) >>>> >>>> err: >>>> clk_disable_unprepare(bus->clk); >>>> - if (!passive) >>>> - regulator_disable(bus->regulator); >>>> - >>>> dev_pm_opp_of_remove_table(dev); >>> >>> This function removes the 'opp_table'. But, the below code >>> uses the 'opp_table' variable by dev_pm_opp_put_regulators(). >>> >>> To disable the regulator, you have to call dev_pm_opp_of_remove_table(dev) >>> after dev_pm_opp_put_regulators(bus->opp_table). >> >> Regulators should be set before dev_pm_opp_add_table(), so exit sequence >> should be in reverse order, >> >> init order: >> >> exynos_bus_parent_parse_of() >> dev_pm_opp_set_regulators() >> exynos_bus_parse_of() >> clk_prepare_enable() >> dev_pm_opp_of_add_table() >> >> exit or error order: >> >> dev_pm_opp_of_remove_table() >> clk_disable_unprepare() >> if (bus->opp_table) >> dev_pm_opp_put_regulators(bus->opp_table); > > dev_pm_opp_of_remove_table() have to be called at the end of exit sequence > after disabling clock and put regulators. Because dev_pm_opp_of_remove_table() > frees the 'opp_table' pointer of device. > > clk_disable_unprepare() > if (bus->opp_table) > dev_pm_opp_put_regulators(bus->opp_table); > dev_pm_opp_of_remove_table() The table is reference counted so it will be freed after count go to zero. >> I will send v4 soon. >> >>>> +err_reg: >>>> + if (bus->opp_table) { >>>> + dev_pm_opp_put_regulators(bus->opp_table); >>>> + bus->opp_table = NULL; >>>> + } >>>> >>>> return ret; >>>> } -- Best regards, Kamil Konieczny Samsung R&D Institute Poland