diff options
| author | Valentina Manea <valentina.manea.m@gmail.com> | 2014-03-08 12:53:35 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-09 06:50:24 (GMT) |
| commit | 87f627f7bd87d077d04a3549b311c6f9a204aaaf (patch) | |
| tree | 23cb741ef44688dd6e86552d5195673f26cbb702 /drivers/staging/usbip/userspace | |
| parent | 6080cd0e9239469524d2aa07250ad4b9f383960d (diff) | |
| download | linux-87f627f7bd87d077d04a3549b311c6f9a204aaaf.tar.xz | |
staging: usbip: userspace: don't throw error when trying to read configuration specific attributes
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>
Diffstat (limited to 'drivers/staging/usbip/userspace')
| -rw-r--r-- | drivers/staging/usbip/userspace/libsrc/usbip_common.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/staging/usbip/userspace/libsrc/usbip_common.c b/drivers/staging/usbip/userspace/libsrc/usbip_common.c index 998c11c..238bf5b 100644 --- a/drivers/staging/usbip/userspace/libsrc/usbip_common.c +++ b/drivers/staging/usbip/userspace/libsrc/usbip_common.c @@ -127,10 +127,23 @@ 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"); - goto err; + if (strcmp(name, "bConfigurationValue") && + strcmp(name, "bNumInterfaces")) { + err("sscanf failed for attribute %s", name); + goto err; + } } err: |