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usb: Strip ALL spaces from passthrough ATA serial number

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Leading spaces in particular were resulting in Linux warnings/panics, but
to be safe strip out all spaces, including those in the middle.

This was noticed on an ipod6g with the stock hard drive; it reported
a serial number of '            xxxxxxxx', which is technically legal
per ATA specs, but needs to be properly trimmed.

Change-Id: I34309fe64b341caefd5b18f6d0cf539cb97d4a38
This commit is contained in:
Solomon Peachy 2025-10-05 15:19:03 -04:00
parent 7795426648
commit 43ec77f84c
1 changed files with 39 additions and 8 deletions
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47
firmware/usbstack/usb_core.c
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@ -373,16 +373,17 @@ static void set_serial_descriptor(void)
}
if (is_printable) {
/* trim trailing spaces */
while (length > 0 && sn[length - 1] == ' ') {
length--;
}
/* trim ALL spaces */
int totallen = length;
for (i = 0; i < length; i++) {
if (sn[i] == ' ') {
totallen--;
continue;
}
*p++ = sn[i];
}
usb_string_iSerial.bLength = 2 + 2 * (1 + length);
usb_string_iSerial.bLength = 2 + 2 * (1 + totallen);
}
else {
for (i = 0; i < length; i++) {
@ -597,8 +598,38 @@ static void control_request_handler_drivers(struct usb_ctrlrequest* req, void* r
if(drivers[i].enabled &&
drivers[i].control_request &&
drivers[i].first_interface <= interface &&
drivers[i].last_interface > interface)
{
drivers[i].last_interface > interface) {
/* Check for SET_INTERFACE and GET_INTERFACE */
if((req->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE &&
(req->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
if(req->bRequest == USB_REQ_SET_INTERFACE) {
logf("usb_core: SET INTERFACE 0x%x 0x%x", req->wValue, req->wIndex);
if(drivers[i].set_interface &&
drivers[i].set_interface(req->wIndex, req->wValue) >= 0) {
sleep(1);
usb_drv_control_response(USB_CONTROL_ACK, NULL, 0);
handled = true;
}
break;
}
else if(req->bRequest == USB_REQ_GET_INTERFACE) {
int alt = -1;
logf("usb_core: GET INTERFACE 0x%x", req->wIndex);
if(drivers[i].get_interface)
alt = drivers[i].get_interface(req->wIndex);
if(alt >= 0 && alt < 255) {
response_data[0] = alt;
usb_drv_control_response(USB_CONTROL_ACK, response_data, 1);
handled = true;
}
break;
}
/* fallback */
}
handled = drivers[i].control_request(req, reqdata, response_data);
if(handled)
break;