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x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE4MDAwNCBTYWx0ZWRfX3tRYIZVRXD9I brdTPMvKXVwYQapWSo5CKPMKxZonN0tf9qRQ14v9hEL0P9GQTLr3w/Y/YYXN0YRfPyItoud3r6T BJFYXt+RZJetgHF4Mi8J7i0mnW5TaFXZ/1DXvgWAwJoA80dpd1ng+jBxFvzqG3sLKqUKrL6o8S6 4AWUptjsf0gXZXjCkMOEyUlietOE7qKOXoV4FfkrFKV+nCrxTM0Ch/cHaxnGj9wVHpU1PXjnTwm /kXcyl+o7eatSpRUUkJdUewBvG7mWmSWNaZ8pb5qNfyk3nmiEd0YBwL319rr8kM5z9fLYfic27S PpXQQe63q5KaOhrnYTm1z9wF08ZTLCZ823+DE69jShJcnEXQHV4AkTWmuc5+JAsVIUGDprKoEPb ztH1GiI5y9H/9G7MQp+B4y9MEw4jFxD/sBnWa2ekM/H6WkZHefDhoGK/jF15vfa4NthgyWszkEz BhklsVPLo6BV3XfIJMw== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE4MDAwNCBTYWx0ZWRfX06XrxELXqtBA BUdQ1rnM9PdgYPyjdHE5ENSJsIbmmdqjdQvJg3sVswkBh+3jpYKdTGkb8XOuScNNsqgbM7RlXbz aCPriiloiYkhmxYw9yW/vO+o3u5fzx0= X-Authority-Analysis: v=2.4 cv=KZfidwYD c=1 sm=1 tr=0 ts=6a5acc8b cx=c_pps a=rz3CxIlbcmazkYymdCej/Q==:117 a=qC1CW/w66vtJz1P9yTJxNA==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=EUspDBNiAAAA:8 a=pGLkceISAAAA:8 a=zkuuJgflLB6RSPNJdggA:9 a=QEXdDO2ut3YA:10 a=bFCP_H2QrGi7Okbo017w:22 X-Proofpoint-GUID: FYejdiXnb8v5ukucGaLo0-82ud2smy-S X-Proofpoint-ORIG-GUID: FYejdiXnb8v5ukucGaLo0-82ud2smy-S X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-17_07,2026-07-17_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 clxscore=1015 malwarescore=0 spamscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607180004 On Tue, 14 Jul 2026 17:56:45 -0700 Jonathan Cameron wrote: > On Mon, 13 Jul 2026 12:53:49 +0200 > Jakub Szczud=C5=82o wrote: >=20 > > > > + ret =3D i2c_master_recv(data->client, (char *)&buffer, sizeof= (buffer)); =20 > > > > > > In theory this can return short (generally reflects a misbehaving dev= ice). > > > =20 > > > > + if (ret < 0) { > > > > + dev_err(&data->client->dev, "I2C read fail: %d\n", re= t); > > > > + return true; > > > > + } =20 > > > > > > if (ret < sizeof(buffer)) > > > return -EIO; > > > =20 > > I have checked the source code for i2c_master_recv and it should > > return sizeof(buffer) > > or errno code. Also David and Andy in v4 told me to delete such check. = =20 >=20 > Fair point on it not being needed. Gah, I get my i2c functions confused. > Only the multi transfer ones can return partial success. Turns out that we are both wrong... See Lars reply to my thread tidying these up universally. It can return 0 :( Anyhow, it is very unlikely to do so and hopefully that thread will lead to us making sure it never does! Jonathan