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[76.210.143.223]) by smtp.gmail.com with ESMTPSA id b9sm12707480pfp.12.2020.05.12.16.00.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 May 2020 16:00:23 -0700 (PDT) Date: Tue, 12 May 2020 16:00:23 -0700 (PDT) X-Google-Original-Date: Tue, 12 May 2020 14:10:27 PDT (-0700) Subject: Re: [PATCH v1 1/1] tty: serial: add missing spin_lock_init for SiFive serial console In-Reply-To: <1589019852-21505-2-git-send-email-sagar.kadam@sifive.com> CC: linux-serial@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Paul Walmsley , aou@eecs.berkeley.edu, Atish Patra , Anup Patel , sagar.kadam@sifive.com From: Palmer Dabbelt To: sagar.kadam@sifive.com, Greg KH Message-ID: Mime-Version: 1.0 (MHng) Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-serial-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org On Sat, 09 May 2020 03:24:12 PDT (-0700), sagar.kadam@sifive.com wrote: > 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; > } Reviewed-by: Palmer Dabbelt Acked-by: Palmer Dabbelt I'm assuming it's going in through Greg's tree. Thanks!