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USB: iowarrior: fix NULL-deref at probe

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am: 653418adaf

Change-Id: I1345deaf740389416299a5d772b8c313baa4ef6d
This commit is contained in:
Johan Hovold
2017-03-18 11:35:53 +00:00
committed by android-build-merger
parent 912a046e77 653418adaf
commit 6c0dcf8695
1 changed files with 7 additions and 6 deletions
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13
drivers/usb/misc/iowarrior.c
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@@ -781,12 +781,6 @@ static int iowarrior_probe(struct usb_interface *interface,
iface_desc = interface->cur_altsetting;
dev->product_id = le16_to_cpu(udev->descriptor.idProduct);
if (iface_desc->desc.bNumEndpoints < 1) {
dev_err(&interface->dev, "Invalid number of endpoints\n");
retval = -EINVAL;
goto error;
}
/* set up the endpoint information */
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
@@ -797,6 +791,13 @@ static int iowarrior_probe(struct usb_interface *interface,
/* this one will match for the IOWarrior56 only */
dev->int_out_endpoint = endpoint;
}
if (!dev->int_in_endpoint) {
dev_err(&interface->dev, "no interrupt-in endpoint found\n");
retval = -ENODEV;
goto error;
}
/* we have to check the report_size often, so remember it in the endianness suitable for our machine */
dev->report_size = usb_endpoint_maxp(dev->int_in_endpoint);
if ((dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) &&