staging: usbip: userspace: don't throw error when trying to read configuration specific attributes (87f627f7) · Commits · 戴 / test

When a device has just been bound to usbip-host but the client hasn't set a configuration on it, certain attributes will not exist. Don't treat this as an error. Signed-off-by:

Valentina Manea <valentina.manea.m@gmail.com> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/usbip/userspace/libsrc/usbip_common.c

+15 −2

Original line number	Diff line number	Diff line
		@@ -127,11 +127,24 @@ int read_attr_value(struct udev_device dev, const char name,
		goto err;
		}

		/* The client chooses the device configuration
		* when attaching it so right after being bound
		* to usbip-host on the server the device will
		* have no configuration.
		* Therefore, attributes such as bConfigurationValue
		* and bNumInterfaces will not exist and sscanf will
		* fail. Check for these cases and don't treat them
		* as errors.
		*/

		ret = sscanf(attr, format, &num);
		if (ret < 1) {
		err("sscanf failed");
		if (strcmp(name, "bConfigurationValue") &&
		strcmp(name, "bNumInterfaces")) {
		err("sscanf failed for attribute %s", name);
		goto err;
		}
		}

		err:

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