fastboot: Keep borked bootloaders happy by shrinking URB len.

Some devices will fail to return the requested data if the final
URB len of the request to > 255.
So shrink the current data buffer from 128 to 127 in the acse of getting
the serial number seems to work just fine.

Change-Id: Ic24e6c86ec93f002dc721d92309b3f880f281f20

parent 545ab460

fastboot/usb_linux.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -131,7 +131,9 @@ static int filter_usb_device(int fd, char *ptr, int len, int writable,
		info.serial_number[0] = 0;
		if (dev->iSerialNumber) {
		struct usbdevfs_ctrltransfer ctrl;
		__u16 buffer[128];
		// Keep it short enough because some bootloaders are borked if the URB len is > 255
		// 128 is too big by 1.
		__u16 buffer[127];
		int result;

		memset(buffer, 0, sizeof(buffer));