| Message ID | 1635303025-772-3-git-send-email-quic_wcheng@quicinc.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Disable mass storage endpoints during disconnect | expand |
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c index 3cabf76..7524396 100644 --- a/drivers/usb/gadget/function/f_mass_storage.c +++ b/drivers/usb/gadget/function/f_mass_storage.c @@ -2342,6 +2342,16 @@ static void fsg_disable(struct usb_function *f) { struct fsg_dev *fsg = fsg_from_func(f); + /* Disable the endpoints */ + if (fsg->bulk_in_enabled) { + usb_ep_disable(fsg->bulk_in); + fsg->bulk_in_enabled = 0; + } + if (fsg->bulk_out_enabled) { + usb_ep_disable(fsg->bulk_out); + fsg->bulk_out_enabled = 0; + } + __raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE, NULL); }
When receiving a disconnect event from the UDC, the mass storage function driver currently runs the handle_exception() routine asynchronously. For UDCs that support runtime PM, there is a possibility the UDC is already suspended by the time the do_set_interface() is executed. This can lead to HW register access while the UDC is already suspended. Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> --- drivers/usb/gadget/function/f_mass_storage.c | 10 ++++++++++ 1 file changed, 10 insertions(+)