Hello Igor Kotrasinski,
The patch ea6873a45a22: "usbip: vudc: Add SysFS infrastructure for
VUDC" from Mar 8, 2016, leads to the following static checker warning:
drivers/usb/usbip/vudc_sysfs.c:201 usbip_status_show()
error: we previously assumed 'udc' could be null (see line 200)
drivers/usb/usbip/vudc_sysfs.c
194 static ssize_t usbip_status_show(struct device *dev,
195 struct device_attribute *attr, char *out)
196 {
197 struct vudc *udc = (struct vudc *) dev_get_drvdata(dev);
198 int status;
199
200 if (!udc) {
^^^^
Check.
201 dev_err(&udc->pdev->dev, "no device");
^^^^^^^^^^^^^^
Dereference.
202 return -ENODEV;
203 }
204 spin_lock_irq(&udc->ud.lock);
205 status = udc->ud.status;
206 spin_unlock_irq(&udc->ud.lock);
207
208 return snprintf(out, PAGE_SIZE, "%d\n", status);
209 }
regards,
dan carpenter
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