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Mon, 24 Sep 2018 14:48:13 +0000 Received: from CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::54e2:88e0:b622:b36]) by CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::54e2:88e0:b622:b36%5]) with mapi id 15.20.1207.003; Mon, 24 Sep 2018 14:48:13 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Michael Hennerich , Linus Walleij , Sasha Levin Subject: [PATCH AUTOSEL 4.18 21/76] gpio: adp5588: Fix sleep-in-atomic-context bug Thread-Topic: [PATCH AUTOSEL 4.18 21/76] gpio: adp5588: Fix sleep-in-atomic-context bug Thread-Index: AQHUVBWeRUacpA6SmE+yaKSdEW1t3A== Date: Mon, 24 Sep 2018 14:48:13 +0000 Message-ID: <20180924144751.164410-21-alexander.levin@microsoft.com> References: <20180924144751.164410-1-alexander.levin@microsoft.com> In-Reply-To: <20180924144751.164410-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR21MB0821;6:KMGXx3WLWmR803CfDeoNJFbro4hwCVktFGca0fzFPZWZPsKNg1Lgb8FTICkhEcO+tiHydeAosEfAn2G33J2V8t9WQ/yd34lumkDC4XE/jChsigBGjaWL53myj1Y7WUFRxVeipjk8hmb6rP+tlCEZgZirxRHZOfUn1sWZygchHbk2sWGDOxOgBN90eJ123riMYDCsiV03u+IKjJX6S48vjPJQ5YZw27tgZhzdK5Qii5CfO2+L9dqBwjtZmtBzPdFnz5HxWSrOEdGE2xNCNoKvipJNX4cNmQu6vzQySjuI+C1gFrUDTv2GG40NeM0Gv1BA50e6g/kyY/hpH4t7Z9l5fOi7TSmnsckdZssVHpMK64ttz7RDkfYsHwhwfxFGrT0lLa7lCAGAU67yAHdkf8y17k5nMSlC5Q67r/uhlAHaxwcx1b/Ikmu0OKeVjEp1AUmyqzvgUBZF/SuMxjHIxJKf1g==;5:DcWnIY08B1N3gND9pjgsKRAskmj2i5KQCYrEsr5s5WtkmDtBrv6BPfYnnQRX5Z/88X58AzTdaOPc/5DSoa0AB4rgwnhs9Tg+pWNuxL8rv7wUn66T4YDsmRm56jbaLhv9OV2MAJECLGw0UaKZmrIF/PYAKU36lZzw75649emSa2M=;7:7OCdEIUz6DyDMjzeBJZaH/oPM/pdoHI3JNTGUH6EC/iUfHHZswEyhlGr8sR9W+k/JfvlS8gRZVoAJD4Ho+PCpDezvM5naIEpfjlYPUE5taSr/n0dBZCGJPTAkPtuhtEiSvLwvzpxHLevOaLECHBpW+KcPHizztQRLoZZNgORZVk80+suJeP/0SkUiCk8TIwuG2aTQgCVbgyS4b7UGLjEwEsGWW3unQzRPpaiyeteIuNnyMZX0SRRg3gSKwx+qiWT x-ms-office365-filtering-correlation-id: 0a517d84-cd90-47a1-1182-08d6222cc17b x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989299)(4534165)(4627221)(201703031133081)(201702281549075)(8990200)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0821; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: 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 spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0a517d84-cd90-47a1-1182-08d6222cc17b X-MS-Exchange-CrossTenant-originalarrivaltime: 24 Sep 2018 14:48:13.7876 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0821 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Michael Hennerich [ Upstream commit 6537886cdc9a637711fd6da980dbb87c2c87c9aa ] This fixes: [BUG] gpio: gpio-adp5588: A possible sleep-in-atomic-context bug in adp5588_gpio_write() [BUG] gpio: gpio-adp5588: A possible sleep-in-atomic-context bug in adp5588_gpio_direction_input() Reported-by: Jia-Ju Bai Signed-off-by: Michael Hennerich Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin --- drivers/gpio/gpio-adp5588.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/drivers/gpio/gpio-adp5588.c b/drivers/gpio/gpio-adp5588.c index 3530ccd17e04..da9781a2ef4a 100644 --- a/drivers/gpio/gpio-adp5588.c +++ b/drivers/gpio/gpio-adp5588.c @@ -41,6 +41,8 @@ struct adp5588_gpio { uint8_t int_en[3]; uint8_t irq_mask[3]; uint8_t irq_stat[3]; + uint8_t int_input_en[3]; + uint8_t int_lvl_cached[3]; }; =20 static int adp5588_gpio_read(struct i2c_client *client, u8 reg) @@ -173,12 +175,28 @@ static void adp5588_irq_bus_sync_unlock(struct irq_da= ta *d) struct adp5588_gpio *dev =3D irq_data_get_irq_chip_data(d); int i; =20 - for (i =3D 0; i <=3D ADP5588_BANK(ADP5588_MAXGPIO); i++) + for (i =3D 0; i <=3D ADP5588_BANK(ADP5588_MAXGPIO); i++) { + if (dev->int_input_en[i]) { + mutex_lock(&dev->lock); + dev->dir[i] &=3D ~dev->int_input_en[i]; + dev->int_input_en[i] =3D 0; + adp5588_gpio_write(dev->client, GPIO_DIR1 + i, + dev->dir[i]); + mutex_unlock(&dev->lock); + } + + if (dev->int_lvl_cached[i] !=3D dev->int_lvl[i]) { + dev->int_lvl_cached[i] =3D dev->int_lvl[i]; + adp5588_gpio_write(dev->client, GPIO_INT_LVL1 + i, + dev->int_lvl[i]); + } + if (dev->int_en[i] ^ dev->irq_mask[i]) { dev->int_en[i] =3D dev->irq_mask[i]; adp5588_gpio_write(dev->client, GPIO_INT_EN1 + i, dev->int_en[i]); } + } =20 mutex_unlock(&dev->irq_lock); } @@ -221,9 +239,7 @@ static int adp5588_irq_set_type(struct irq_data *d, uns= igned int type) else return -EINVAL; =20 - adp5588_gpio_direction_input(&dev->gpio_chip, gpio); - adp5588_gpio_write(dev->client, GPIO_INT_LVL1 + bank, - dev->int_lvl[bank]); + dev->int_input_en[bank] |=3D bit; =20 return 0; } --=20 2.17.1