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usb: core: message: remember to reset 'ret' to 0 when necessary

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usb_control_msg() will return the amount of bytes transferred, if that
amount matches what we wanted to transfer, we need to reset 'ret' to 0
from usb_get_status().

Fixes: 2e43f0fe37 ("usb: core: add a 'type' parameter to usb_get_status()")
Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Felipe Balbi 2017-11-09 12:59:58 +02:00 committed by Greg Kroah-Hartman
parent 0c3b34a569
commit d656fa32b1
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/core/message.c
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@ -975,6 +975,7 @@ int usb_get_status(struct usb_device *dev, int recip, int type, int target,
}
*(u32 *) data = le32_to_cpu(*(__le32 *) status);
ret = 0;
break;
case 2:
if (type != USB_STATUS_TYPE_STANDARD) {
@ -983,6 +984,7 @@ int usb_get_status(struct usb_device *dev, int recip, int type, int target,
}
*(u16 *) data = le16_to_cpu(*(__le16 *) status);
ret = 0;
break;
default:
ret = -EIO;