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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-OriginatorOrg: chipsnmedia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SL2P216MB2441.KORP216.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-Network-Message-Id: 49cfd082-ab21-48a7-5620-08de694386b5 X-MS-Exchange-CrossTenant-originalarrivaltime: 11 Feb 2026 07:59:47.6633 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4d70c8e9-142b-4389-b7f2-fa8a3c68c467 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 836Nv/2ScRoGpFYfJdm8Z+7QaReP6PO5g2N0v1+zFbr5z48Lgb/UHtZLjfm9SwlGjgJRnJyf4VIWRLpPT2ihXWUrPnR92D2kGij9T2s0A8o= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SE2P216MB1537 Hi, Dan. >-----Original Message----- >From: Dan Carpenter >Sent: Friday, February 6, 2026 10:41 PM >To: jackson.lee >Cc: linux-media@vger.kernel.org; linux-kernel kernel@vger.kernel.org> >Subject: [bug report] media: chips-media: wave5: Fix Null reference while >testing fluster > >[ Smatch checking is paused while we raise funding. #SadFace > https://lore.kernel.org/all/aTaiGSbWZ9DJaGo7@stanley.mountain/ -dan ] > >Hello Jackson Lee, > >Commit e66ff2b08e4e ("media: chips-media: wave5: Fix Null reference >while testing fluster") from Nov 19, 2025 (linux-next), leads to the >following Smatch static checker warning: > > drivers/media/platform/chips-media/wave5/wave5-vpu.c:415 >wave5_vpu_probe() > error: 'dev->irq_thread' dereferencing possible ERR_PTR() > >drivers/media/platform/chips-media/wave5/wave5-vpu.c > 327 > 328 dev->product_code =3D wave5_vdi_read_register(dev, >VPU_PRODUCT_CODE_REGISTER); > 329 ret =3D wave5_vdi_init(&pdev->dev); > 330 if (ret < 0) { > 331 dev_err(&pdev->dev, "wave5_vdi_init, fail: %d\n", = ret); > 332 goto err_clk_dis; > 333 } > 334 dev->product =3D wave5_vpu_get_product_id(dev); > 335 > 336 INIT_LIST_HEAD(&dev->instances); > 337 > 338 dev->irq =3D platform_get_irq(pdev, 0); > 339 if (dev->irq < 0) { > 340 dev_err(&pdev->dev, "failed to get irq resource, f= alling >back to polling\n"); > 341 sema_init(&dev->irq_sem, 1); > 342 dev->irq_thread =3D kthread_run(irq_thread, dev, "= irq >thread"); > >Add error checking for if kthread_run() fails? Thanks for the report. A fix has been proposed by Alper Ak in a separate thread: https://lore.kernel.org/all/20260207103224.609938-1-alperyasinak1@gmail.com= / I'm going to check it and run tests on my side. Thanks. Nas. > > 343 hrtimer_setup(&dev->hrtimer, &wave5_vpu_timer_call= back, >CLOCK_MONOTONIC, > 344 HRTIMER_MODE_REL_PINNED); > >regards, >dan carpenter