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Wed, 6 Mar 2019 06:30:47 +0000 Received: from AM6PR04MB5016.eurprd04.prod.outlook.com ([fe80::5841:afe:53fd:42bb]) by AM6PR04MB5016.eurprd04.prod.outlook.com ([fe80::5841:afe:53fd:42bb%6]) with mapi id 15.20.1665.020; Wed, 6 Mar 2019 06:30:47 +0000 From: Clark Wang To: "broonie@kernel.org" CC: "linux-spi@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: [PATCH V2 7/8] spi: lpspi: Add the missing NULL check Thread-Topic: [PATCH V2 7/8] spi: lpspi: Add the missing NULL check Thread-Index: AQHU0+Yixo4aIJF2cE68MUX+Dtp80Q== Date: Wed, 6 Mar 2019 06:30:47 +0000 Message-ID: <20190306063020.793-8-xiaoning.wang@nxp.com> References: <20190306063020.793-1-xiaoning.wang@nxp.com> In-Reply-To: <20190306063020.793-1-xiaoning.wang@nxp.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SG2PR02CA0029.apcprd02.prod.outlook.com (2603:1096:3:18::17) To AM6PR04MB5016.eurprd04.prod.outlook.com (2603:10a6:20b:9::24) x-mailer: git-send-email 2.17.1 authentication-results: spf=none (sender IP is ) smtp.mailfrom=xiaoning.wang@nxp.com; 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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: 8wZNWMtjfAZJBn9ciVRgTaAk3K4O8ieKGsllxELs8lsOHnVbNhDtyLsJs8Y1u1JePjYxeLdoMSninU9uWbcIvPHLnWzfsWyM7qlCqGmP0xh7Ubw+dz6v3/R9iFqcb8T0e4NmrDWHi94qY0SUxhVZr5DpJoMXlozaixGdgc6FqgDieGc0kQHNE0o9rwIPoEUCKnoUaVkAfR1yjcUBSeBpDGJG0ITK6DRIj9OOOf6Z/3WwTr1ijFmkCfjLUGa1cBZ/Mr0d8aJHP9kowOMc0SWhEBZNEJkK0+REn18cVXs/Alf4rJQDRvC+NEVjdbr3XDiQeH9NdBXEmm9FCi52WAk33u1Tf4rOFZz6lT3+LTTMTGuKoc71QsGckZv5hs55rGruZ0KguIKldMBHUHIgcN0/tr4SUotcZqkmMzV4NeOowRg= MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: dc5d0619-4c38-47d2-57c7-08d6a1fd448c X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Mar 2019 06:30:47.4684 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR04MB4373 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The spi_transfer *t will be used in one transfer whatever. If t is NULL, there has no need to try sending data, so add an error return here. Signed-off-by: Clark Wang Acked-by: Fugang Duan --- V2: - add this patch in this version --- drivers/spi/spi-fsl-lpspi.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 9ff32fb67a29..2ac3ac5ea50a 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -438,9 +438,12 @@ static int fsl_lpspi_setup_transfer(struct spi_controller *controller, struct fsl_lpspi_data *fsl_lpspi = spi_controller_get_devdata(spi->controller); + if (t == NULL) + return -EINVAL; + fsl_lpspi->config.mode = spi->mode; - fsl_lpspi->config.bpw = t ? t->bits_per_word : spi->bits_per_word; - fsl_lpspi->config.speed_hz = t ? t->speed_hz : spi->max_speed_hz; + fsl_lpspi->config.bpw = t->bits_per_word; + fsl_lpspi->config.speed_hz = t->speed_hz; fsl_lpspi->config.chip_select = spi->chip_select; if (!fsl_lpspi->config.speed_hz)