diff options
Diffstat (limited to 'drivers/usb/gadget/function/f_mass_storage.c')
| -rw-r--r-- | drivers/usb/gadget/function/f_mass_storage.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c index 043f97ad8f22..982c3e89eb0d 100644 --- a/drivers/usb/gadget/function/f_mass_storage.c +++ b/drivers/usb/gadget/function/f_mass_storage.c @@ -2293,8 +2293,7 @@ static int fsg_set_alt(struct usb_function *f, unsigned intf, unsigned alt) static void fsg_disable(struct usb_function *f) { struct fsg_dev *fsg = fsg_from_func(f); - fsg->common->new_fsg = NULL; - raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE); + raise_exception(fsg->common, FSG_STATE_DISCONNECT); } @@ -2307,6 +2306,7 @@ static void handle_exception(struct fsg_common *common) enum fsg_state old_state; struct fsg_lun *curlun; unsigned int exception_req_tag; + struct fsg_dev *fsg; /* * Clear the existing signals. Anything but SIGUSR1 is converted @@ -2413,9 +2413,19 @@ static void handle_exception(struct fsg_common *common) break; case FSG_STATE_CONFIG_CHANGE: - do_set_interface(common, common->new_fsg); - if (common->new_fsg) + fsg = common->new_fsg; + /* + * Add a check here to double confirm if a disconnect event + * occurs and common->new_fsg has been cleared. + */ + if (fsg) { + do_set_interface(common, fsg); usb_composite_setup_continue(common->cdev); + } + break; + + case FSG_STATE_DISCONNECT: + do_set_interface(common, NULL); break; case FSG_STATE_EXIT: @@ -2989,8 +2999,7 @@ static void fsg_unbind(struct usb_configuration *c, struct usb_function *f) DBG(fsg, "unbind\n"); if (fsg->common->fsg == fsg) { - fsg->common->new_fsg = NULL; - raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE); + raise_exception(fsg->common, FSG_STATE_DISCONNECT); /* FIXME: make interruptible or killable somehow? */ wait_event(common->fsg_wait, common->fsg != fsg); } |