On Tue, Dec 14, 2021 11:03 PM +0800, Mauro Carvalho Chehab wrote: >> + if (!devname) >> + dev_err(&d->udev->dev, "%s: kstrdup() failed\n", KBUILD_MODNAME); >> + > Don't use KBUILD_MODNAME, as dev_err will already add the driver/device's > name. Here I know I need to change it to: dev_err(&d->udev->dev, "kstrdup() failed\n"); >> - pr_info("%s: '%s:%s' successfully deinitialized and disconnected\n", >> - KBUILD_MODNAME, drvname, devname); > > Better to use: > dev_dbg(&d->udev->dev, "successfully deinitialized and disconnected\n"); > >> - kfree(devname); > No need to place kfree() inside an if, as kfree(NULL) is safe. Here I know I need to put kfree() at the end of this function. However, if I replace the original pr_info(...) with: > dev_dbg(&d->udev->dev, "successfully deinitialized and disconnected\n"); Then devname and drvname seems can be all removed, as they are useless in dvb_usbv2_disconnect() anymore. I am not sure if I understand correctly. If so, I will just remove them and change pr_info() -> dev_dbg() in next version.