From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=79.135.106.31 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793241175; b=fx3087vMrxX6PBMYcuc/bXR7EZSFbqiR7gpFC49Ltfd5yx7RLfYmTyS6X0zs4f4VMTBg zbaKrRVFqY+WBTk9ZYL+cpAc0x54c0ea82wELvccAlOk0e4+UTyUz+Z7yVAwakbHtINCs DGVEuUi2ljfQznDGp5ZH5fkzuUTNwqoCMialIwnqr0+ptxtO8ypc8xAqqGUqv3CG/Z8z5 K17CpXchljG1WunccaN4ox38g/wHwwbwnFA4UEoLYQY8JScHYwN6rqxMSN7f/bSjbUlPN WVXTsX6BAxhWeCBakLpuHNcuMyishSVX57phiysLEuwHo1U23ghAc/ytou3JWQEEd5w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793241175; h=DMARC-Filter:DKIM-Signature:Date:To:From:Cc:Subject:Message-ID: In-Reply-To:References:Feedback-ID:X-Pm-Message-ID:MIME-Version: Content-Type:Content-Transfer-Encoding; bh=5HAya7AXrvW9nuDMyU/T5LGM7V6HXtcY2BGF7KxiYmA=; b=HXQLjgz85Jlxd5hcb+cE8OTRZU7hRNaWdhbS4RSohxFlv4Wv6rW2A+VzOhrnmozU5Td4 7gavlctJKbyr7AnvZSgvCnFPgETOo/qms0G64QAibE/YP24Z2SSGDpcYjexct6Lnrw64I 2WHEmwTGdNQ6jp0aQeCRQTukJfzPAe77fTTzAHVL4r0W5sUoKgtwBR7vOHJCaeYTwR1Fi swq86QwDwAS8tsLzL5bdkbKG0UXHSyLo0CVYD0HYN8RifY+juWBm0dnLIfDCWhNbacuWp qj5wm2iTK3OWKpHun1b6LRbI/WiNhm6WuWvaeRUXW1xFetLQ70O7bRz1iJ+bFOcAPCA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=proton.me; spf=pass smtp.mailfrom=proton.me; dkim=pass header.d=proton.me header.i=@proton.me header.a=rsa-sha256 header.s=protonmail2 header.b=AIb5uj4v; arc=none smtp.remote-ip=79.135.106.31 Received: from mail-10631.protonmail.ch (mail-10631.protonmail.ch [79.135.106.31]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B386F606A31D for ; Thu, 29 Oct 2026 02:32:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org B386F606A31D Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=proton.me Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=proton.me Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=proton.me header.i=@proton.me header.a=rsa-sha256 header.s=protonmail2 header.b=AIb5uj4v DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=proton.me; s=protonmail2; t=1793241171; x=1793500371; bh=5HAya7AXrvW9nuDMyU/T5LGM7V6HXtcY2BGF7KxiYmA=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=AIb5uj4vlwZR3NhO90Y28Cxnm8lT1hWVpiUmMdgYWn7QcwXQpIGWgcdUZPaGOTj8e 5BVE0UKK4keJnZU9sqCeBsQQe9I1qcdkNs23PyCm4j3w4C02kducuw08RtzD+th0cN Hhic35jHrw9uF02lIq71gTYEvLTb2KRXrylbklH+VqIJCuCodU5dqTcLvH/ewwWAgM 0q8JOFg9nBi+hCIDQ42DLXDWRqLbVKice7RtT0ppXLxbLSadIWAaVJnI9A5w5en7Id +tnJ+bDf20jl8xjrQlGezi+JV7DbmzWRF5VJ8FW5yISkvq+sRQQxxz/lfV5n0MutAI kBtMn6nTq4zsg== Date: Thu, 29 Oct 2026 02:32:46 +0000 To: linux-bluetooth@vger.kernel.org From: Kyle Pepper Cc: linux-kernel@vger.kernel.org, luiz.dentz@gmail.com, marcel@holtmann.org Subject: [RFC PATCH v3 0/1] Bluetooth: btusb: UB500 reported maximum data length Message-ID: <20261029023235.1280321-1-cochcoder@proton.me> In-Reply-To: <20261013032742.497402-1-cochcoder@proton.me> References: <20261013032742.497402-1-cochcoder@proton.me> Feedback-ID: 97716137:user:proton X-Pm-Message-ID: 86604828647744461e295fc629aa5efc46e70b8c X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Luiz, LE Read Maximum Data Length reports TX/RX251, while LE Read Buffer Size reports 27/eight. A separate raw HCI test verified sixteen 251-byte packets received byte-for-byte intact and completed, with one packet outstanding at a time. RFC v3 replaces 167 with the reported maximum TX length, retaining eight LE credits. This establishes HCI251 acceptance, not physical pool capacity or an absolute HCI limit. Audio with the revised callback remains untested. Prepared with LLM assistance. Kyle Kyle Pepper (1): Bluetooth: btusb: test reported maximum LE length on TP-Link UB500 drivers/bluetooth/btusb_main.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) base-commit: 1081a6ef8f1e0661fd52eb3f878691b0b96cdff9 --=20 2.56.0