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[2003:f6:5f19:a904:1674:bacf:5859:3a35]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-4a1cc642573sm209959665e9.2.2026.10.19.00.51.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Oct 2026 00:51:42 -0700 (PDT) Date: Mon, 19 Oct 2026 09:51:40 +0200 From: Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= To: Arnd Bergmann Cc: Greg Kroah-Hartman , Jiri Slaby , Andy Shevchenko , Hugo Villeneuve , Arnd Bergmann , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev Subject: Re: [PATCH 1/2] tty: serial: remove hub6 multiport support Message-ID: References: <20261016130328.1037616-1-arnd@kernel.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="u5tdsywsd4xqnlzl" Content-Disposition: inline In-Reply-To: <20261016130328.1037616-1-arnd@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261019_005146_254062_E3CBFD97 X-CRM114-Status: GOOD ( 20.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --u5tdsywsd4xqnlzl Content-Type: text/plain; protected-headers=v1; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH 1/2] tty: serial: remove hub6 multiport support MIME-Version: 1.0 On Fri, Oct 16, 2026 at 02:59:47PM +0200, Arnd Bergmann wrote: > From: Arnd Bergmann >=20 > hub6 support was added in linux-0.99 and the hardware was already old at > the time, being discontinued in 1990. The code for it has always been a > mess since it adds another dimension to the I/O addressing in the driver > that has leaked into many individual files. >=20 > Hugo and Uwe have attempted several times this year alone to isolate > the hub6 handling into the 8250_hub6.c file, but I feel that none of > this has been a real improvement over the original standalone loadable > module support. >=20 > Any machine that would have used this ISA card in practice is likely > 30 to 40 years old, and with i486 support now removed, it is clearly > safe to just kill this all off. The only bit that has to remain > is the ioctl interface, to ensure the serial_struct field is always > zero. >=20 > Link: https://mirrors.nycbug.org/pub/The_Unix_Archive/Unix_Usenet/comp.un= ix.sysv386/1990-December/007174.html > Fixes: a300273c458c ("serial: 8250: hub6: Add cleanup code") > Fixes: c526404a4a92 ("serial: 8250: Fix corner case for port matching") > Fixes: 7ab80d1e7243 ("serial: 8250: fix compile error with hub6_match_por= t() when compiled as a module") > Fixes: da7b5fd4e17f ("serial: 8250_hub6: add missing include for hub6_mat= ch_port()") > Fixes: 3d406299d882 ("serial: 8250_hub6: add hub6_match_port()") > Signed-off-by: Arnd Bergmann Fine for me. I wonder about the amount of Fixes: lines, but don't care enough to check. Acked-by: Uwe Kleine-K=F6nig Best regards Uwe --u5tdsywsd4xqnlzl Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEP4GsaTp6HlmJrf7Tj4D7WH0S/k4FAmrVzAoACgkQj4D7WH0S /k4iJQf/V9G3FkSyYROePlk1XfrPSUEEaa8TTie3oEy+xPCSy0gTbErCq+RHUo4D GxHAkavC95XGxxdZLoXmp7zZUrmdWASZLB+8Zx/zQ4uY474FnrmRb9wWmxzzt7s/ nYDE6veRDWeoi4Lcszow8rDX0uFISAaAjrBfAd/JE1t+QpkcNrYBC/PoT2BBUz6M q1WbGxPxjSTmmYnqV3IT1Xp83J6CnJVVBme8YP4cqXBmMC0t7JZ2TEYeu42aTSFb 40v0k3I8d5pHzBl0W5c/DRH23ygvmgBFxaqFv+7uJovkvfnGmqATfNGCKzXM0lLy P5TeqJWAB+sq7IQV0tkv0LpgWGVN6A== =VH96 -----END PGP SIGNATURE----- --u5tdsywsd4xqnlzl--