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[60.39.60.229]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-73970e1d922sm4991601b3a.37.2025.03.30.03.51.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Mar 2025 03:51:41 -0700 (PDT) From: Ryo Takakura To: gregkh@linuxfoundation.org Cc: alex@ghiti.fr, aou@eecs.berkeley.edu, bigeasy@linutronix.de, conor.dooley@microchip.com, jirislaby@kernel.org, john.ogness@linutronix.de, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-serial@vger.kernel.org, lkp@intel.com, oe-kbuild-all@lists.linux.dev, palmer@dabbelt.com, paul.walmsley@sifive.com, pmladek@suse.com, ryotkkr98@gmail.com, samuel.holland@sifive.com, stable@vger.kernel.org, u.kleine-koenig@baylibre.com Subject: Re: [PATCH v2 1/2] serial: sifive: lock port in startup()/shutdown() callbacks Date: Sun, 30 Mar 2025 19:51:35 +0900 Message-Id: <20250330105135.389827-1-ryotkkr98@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <2025033015-blanching-pagan-db09@gregkh> References: <2025033015-blanching-pagan-db09@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi Greg, On Sun, 30 Mar 2025 09:30:27 +0200, Greg KH wrote: >On Sun, Mar 30, 2025 at 10:16:10AM +0900, Ryo Takakura wrote: >> startup()/shutdown() callbacks access SIFIVE_SERIAL_IE_OFFS. >> The register is also accessed from write() callback. >> >> If console were printing and startup()/shutdown() callback >> gets called, its access to the register could be overwritten. >> >> Add port->lock to startup()/shutdown() callbacks to make sure >> their access to SIFIVE_SERIAL_IE_OFFS is synchronized against >> write() callback. >> >> Signed-off-by: Ryo Takakura >> Cc: stable@vger.kernel.org >> --- >> >> Hi, >> >> I'm sorry that I wasn't aware of how Cc stable should be done. >> >> I added Cc for stable but please tell me if this patch should be >> resent or if there is any that is missing. > >Please resend a v3. Ok. I'll send v3 shortly ;) Sincerely, Ryo Takakura >thanks, > >greg k-h