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[76.11.42.59]) by smtp.gmail.com with ESMTPSA id af79cd13be357-930b549629dsm389690485a.47.2026.07.18.05.05.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Jul 2026 05:05:11 -0700 (PDT) From: Ryan Wilbur To: andriy.shevchenko@linux.intel.com Cc: gregkh@linuxfoundation.org, hvilleneuve@dimonoff.com, ilpo.jarvinen@linux.intel.com, jirislaby@kernel.org, john.ogness@linutronix.de, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, manuel.lauss@gmail.com, rwilbur633@gmail.com, stable@vger.kernel.org Subject: Re: [PATCH] serial: 8250: clear stuck RX-timeout interrupt on LPC32xx (PORT_LPC3220) Date: Sat, 18 Jul 2026 09:04:36 -0300 Message-Id: <20260718120436.20196-1-rwilbur633@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Fri, Jul 17, 2026 at 20:54:02 +0300, Andy Shevchenko wrote: > > + * Same bug worked around for other 8250 cores (8250_dw, 8250_omap, 8250_bcm7271). > > This is 8250-port.c. > > > + if (port->type == PORT_LPC3220 && > > Why do we have this then? dw/omap/bcm7271 handle their variants of this in their own drivers. LPC32xx (PORT_LPC3220) has no dedicated 8250 glue driver. I gated it on port->type because LPC32xx is the only hardware I can test on, and I wanted to avoid changing behaviour on 8250 variants I can't verify. That said, the read only fires on a bogus IIR=RX_TIMEOUT with LSR.DR clear, which a healthy 16550 never reports, so it's harmless on other parts. Unless you object, I'll drop the PORT_LPC3220 gate to allow for generic handling.