Hi Shuqiao, Thank you for the patch.
On Fri, Sep 18, 2026 at 18:11, Shuqiao Zhang via B4 Relay <[email protected]> wrote: > From: Shuqiao Zhang <[email protected]> > > usb_descriptor_fillbuf() expects descriptor arrays to end with NULL. > The high-speed RockUSB array does, but the full-speed array does not. > Full-speed enumeration therefore reads beyond the array and treats > adjacent data as another descriptor pointer. > > On a Luckfox Lyra Ultra (RK3506B), the adjacent interface descriptor > started with bytes 09 04 00 00. They were interpreted as pointer > 0x00000409, causing a data abort in usb_descriptor_fillbuf(). > > Add the missing NULL terminator, matching the high-speed descriptor > array. After this change, RockUSB enumerates at full speed and > upgrade_tool can successfully read the eMMC. > > Fixes: bf2b72bef14b ("usb: rockchip: add the rockusb gadget") > Signed-off-by: Shuqiao Zhang <[email protected]> Reviewed-by: Mattijs Korpershoek <[email protected]>
