zephyr/drivers/usb
Tomasz Moń 0d4aa49766 drivers: usb_dc_nrfx: Do not uninit endpoints on detach
Sometimes it is desired for the USB device to detach and reattach itself
to the host. USB device controller driver interface supports detach with
usb_dc_detach() function. Subsequently the device can be reattached to
the bus by calling usb_dc_attach().

USB device stack sets the control transfer callbacks in usb_enable().
Nordic usb_dc_detach() implementation inadvertedly overwrote registered
callbacks with zeroes by clearing endpoint configuration structure. This
lead to a NULL pointer dereference during enumeration after device has
reattached inself to the host.

Preserve the callbacks by removing the eps_ctx_uninit() function.
Endpoints runtime data is initialized in usb_dc_attach() so this should
pose no problems.

Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
2022-09-21 12:56:39 +02:00
..
device drivers: usb_dc_nrfx: Do not uninit endpoints on detach 2022-09-21 12:56:39 +02:00
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