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Thu, 23 Jul 2026 10:43:14 -0700 (PDT) Date: Thu, 23 Jul 2026 10:43:11 -0700 From: Dmitry Torokhov To: azkali.limited@gmail.com Cc: Henrik Rydberg , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH v2] Input: edt-ft5x06 - ignore contacts with an out-of-range slot id Message-ID: References: <20260723-b4-ft5426-v2-1-cd2bed168051@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260723-b4-ft5426-v2-1-cd2bed168051@gmail.com> On Thu, Jul 23, 2026 at 08:24:09PM +0700, Alexandre Hamamdjian via B4 Relay wrote: > From: Alexandre Hamamdjian > > The per-contact slot id is taken from the top nibble of the third > report byte, so it can be any value from 0 to 15. The driver only > allocates max_support_points MT slots (2 to 10 depending on the > variant), so a report that carries an id at or above that count - be it > a genuinely higher-numbered contact or a corrupted byte - is outside the > range the input core was told about. > > input_mt_slot() silently ignores an ABS_MT_SLOT beyond num_slots and > leaves the current slot unchanged, so the following > input_mt_report_slot_state()/touchscreen_report_pos() pair is applied to > whichever slot happened to be selected last, reporting the contact at the > wrong position. Skip such entries instead. > > Signed-off-by: Alexandre Hamamdjian Applied, thank you. -- Dmitry