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[35.228.173.165]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5990da1a4b8sm1003489e87.31.2025.12.16.07.42.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Dec 2025 07:42:27 -0800 (PST) From: Ricardo Ribalda Date: Tue, 16 Dec 2025 15:42:24 +0000 Subject: [PATCH v2 1/2] media: iris: Document difference in size during allocation 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="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251216-warnings-6-19-v2-1-12075e3dece7@chromium.org> References: <20251216-warnings-6-19-v2-0-12075e3dece7@chromium.org> In-Reply-To: <20251216-warnings-6-19-v2-0-12075e3dece7@chromium.org> To: Keke Li , Jacopo Mondi , Daniel Scally , Hans Verkuil , Laurent Pinchart , Vikash Garodia , Dikshita Agarwal , Abhinav Kumar , Bryan O'Donoghue , Mauro Carvalho Chehab Cc: Sakari Ailus , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Ricardo Ribalda X-Mailer: b4 0.14.2 As we get ready for kzalloc checking for invalid sizes, let's add documentation for the cases where the size is different but valid. This patch fixes this cocci warning: ./platform/qcom/iris/iris_hfi_gen2_command.c:1215:9-25: WARNING: casting va= lue returned by memory allocation function to (struct iris_inst *) is usele= ss. Signed-off-by: Ricardo Ribalda --- drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c b/dri= vers/media/platform/qcom/iris/iris_hfi_gen2_command.c index f9129553209922fda548ca320494ae6ae797854c..c120ea3594fb5d0f40d6b9a7c67= ffc28c42109f0 100644 --- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c +++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c @@ -1212,5 +1212,10 @@ void iris_hfi_gen2_command_ops_init(struct iris_core= *core) =20 struct iris_inst *iris_hfi_gen2_get_instance(void) { - return (struct iris_inst *)kzalloc(sizeof(struct iris_inst_hfi_gen2), GFP= _KERNEL); + struct iris_inst_hfi_gen2 *out; + + /* The allocation is intentionally larger than struct iris_inst. */ + out =3D kzalloc(sizeof(*out), GFP_KERNEL); + + return &out->inst; } --=20 2.52.0.239.gd5f0c6e74e-goog