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Sat, 9 May 2020 10:24:43 +0000 From: Sagar Shrikant Kadam To: gregkh@linuxfoundation.org, linux-serial@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: palmer@dabbelt.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu, atish.patra@wdc.com, anup.patel@wdc.com, Sagar Shrikant Kadam Subject: [PATCH v1 1/1] tty: serial: add missing spin_lock_init for SiFive serial console Date: Sat, 9 May 2020 03:24:12 -0700 Message-Id: <1589019852-21505-2-git-send-email-sagar.kadam@sifive.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1589019852-21505-1-git-send-email-sagar.kadam@sifive.com> References: <1589019852-21505-1-git-send-email-sagar.kadam@sifive.com> Content-Type: text/plain X-ClientProxiedBy: BYAPR01CA0056.prod.exchangelabs.com (2603:10b6:a03:94::33) To BN8PR13MB2611.namprd13.prod.outlook.com (2603:10b6:408:81::17) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from gamma07.internal.sifive.com (64.62.193.194) by BYAPR01CA0056.prod.exchangelabs.com (2603:10b6:a03:94::33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.2979.27 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: Dz4OezNYHZcProe9aSmZIKmxNvvkkf5Berzry4ILVCnvSyt1wETtwPfzp7OoSfatUiFAUX+XO7KwaEtHoz2D8Ece5F3HL1O9uL3/73+e6PF8NueI6gM2Bulj8inq3TC8EAckPxU5W5wDRlu+6Mt8pBq8GIlONUWZxFmf/LvZdmNgNQxJiqpwhWqyjUL0NFNFiNrQz6di5qm59HGJEpYeNSZJPbRUzJioOyhtazkei3mR00B06ANT9rVxT2eFrPs34N5PS71k1ncukIK0Hv2w0me8v6rctkU3uijFWP9ky4l7jT393dRtFPFpT5kHXLa5ok27dNYVdCPMtplOCCLJY2a5bv05XGRWASK1mddKeRUspvudEOuJIi+rUmEYrPF6jl3UiYLMk3BRh1PH+HgNP03R52iyszVLSHKL+pHITMJ69oZC1Kg/BCl3nzfu1DjnNfZ9h2J+QYQoBlYhXYnZrXoyeH47+jxkKhVIqhz652c= X-OriginatorOrg: sifive.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2c2b23d0-35b2-456a-c621-08d7f403304b X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 May 2020 10:24:43.3053 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 22f88e9d-ae0d-4ed9-b984-cdc9be1529f1 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: H47gJm8m8zHr61iGLTsk3vs2ykGtYznYrn5N0AUBmnLig8NRYjIjEFhAJs1hyV4gICmOCoVtILx2G7H/PE7G+g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN8PR13MB2724 Sender: linux-serial-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org An uninitialised spin lock for sifive serial console raises a bad magic spin_lock error as reported and discussed here [1]. Initialising the spin lock resolves the issue. The fix is tested on HiFive Unleashed A00 board with Linux 5.7-rc4 and OpenSBI v0.7 [1] https://lore.kernel.org/linux-riscv/b9fe49483a903f404e7acc15a6efbef756db28ae.camel@wdc.com Fixes: 45c054d0815b ("tty: serial: add driver for the SiFive UART") Reported-by: Atish Patra Signed-off-by: Sagar Shrikant Kadam --- drivers/tty/serial/sifive.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/sifive.c b/drivers/tty/serial/sifive.c index 13eadcb..0b5110d 100644 --- a/drivers/tty/serial/sifive.c +++ b/drivers/tty/serial/sifive.c @@ -883,6 +883,7 @@ console_initcall(sifive_console_init); static void __ssp_add_console_port(struct sifive_serial_port *ssp) { + spin_lock_init(&ssp->port.lock); sifive_serial_console_ports[ssp->port.line] = ssp; } -- 2.7.4