add stmac read mac form eeprom

hc

2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/usb/misc/yurex.c
..
..
@@ -96,15 +96,13 @@
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 	if (dev->cntl_urb) {
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 		usb_kill_urb(dev->cntl_urb);
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 		kfree(dev->cntl_req);
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-		if (dev->cntl_buffer)
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-			usb_free_coherent(dev->udev, YUREX_BUF_SIZE,
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+		usb_free_coherent(dev->udev, YUREX_BUF_SIZE,
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 				dev->cntl_buffer, dev->cntl_urb->transfer_dma);
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 		usb_free_urb(dev->cntl_urb);
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 	}
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 	if (dev->urb) {
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 		usb_kill_urb(dev->urb);
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-		if (dev->int_buffer)
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-			usb_free_coherent(dev->udev, YUREX_BUF_SIZE,
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+		usb_free_coherent(dev->udev, YUREX_BUF_SIZE,
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 				dev->int_buffer, dev->urb->transfer_dma);
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 		usb_free_urb(dev->urb);
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 	}
..
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@@ -472,7 +470,7 @@
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 		break;
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 	case CMD_SET:
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 		data++;
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-		/* FALL THROUGH */
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+		fallthrough;
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 	case '0' ... '9':
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 		set = 1;
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 		c = c2 = simple_strtoull(data, NULL, 0);