Hello Igor Kotrasinski,
The patch 80fd9cd52de6: "usbip: vudc: Add VUDC main file" from Mar 8,
2016, leads to the following static checker warning:
drivers/usb/usbip/vudc_main.c:88 init()
warn: perhaps platform_device_put() was intended here?
drivers/usb/usbip/vudc_main.c
56 retval = platform_driver_register(&vudc_driver);
57 if (retval < 0)
58 goto out;
59
60 for (i = 0; i < vudc_number; i++) {
61 udc_dev = alloc_vudc_device(i);
62 if (!udc_dev) {
63 retval = -ENOMEM;
64 goto cleanup;
65 }
66
67 retval = platform_device_add(udc_dev->pdev);
68 if (retval < 0) {
69 put_vudc_device(udc_dev);
70 goto cleanup;
71 }
72
73 list_add_tail(&udc_dev->dev_entry, &vudc_devices);
74 if (!platform_get_drvdata(udc_dev->pdev)) {
75 /*
76 * The udc was added successfully but its probe
77 * function failed for some reason.
78 */
79 retval = -EINVAL;
80 goto cleanup;
81 }
82 }
83 goto out;
84
85 cleanup:
86 list_for_each_entry_safe(udc_dev, udc_dev2, &vudc_devices,
dev_entry) {
87 list_del(&udc_dev->dev_entry);
88 platform_device_del(udc_dev->pdev);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
I had to look through my git log to find why Smatch generates this
warning. Apparently the check was inspired by e9a1c5129de1caf
"wm8350-regulator: fix wm8350_register_regulator error handling". I
wrote it in 2010 and this is the first time this warning has ever been
triggered. I'm very excited! But I have no idea if it's a false
positive or a real bug.
89 put_vudc_device(udc_dev);
90 }
regards,
dan carpenter
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