From ffe4ac92ee5a4a0a236b9583c3173902e158e14b Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Thu, 14 Jun 2012 20:07:02 -0300 Subject: [PATCH] [media] dvb_usb_v2: do not release USB interface when device reconnects USB core will call disconnect and remove driver for us as device will disconnect itself. After that it is loaded again as a new device but it is warm and no firmware loading needed. Reported-by: Malcolm Priestley Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/dvb-usb/dvb_usb_init.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/media/dvb/dvb-usb/dvb_usb_init.c b/drivers/media/dvb/dvb-usb/dvb_usb_init.c index 0ac1a72..e9bb006 100644 --- a/drivers/media/dvb/dvb-usb/dvb_usb_init.c +++ b/drivers/media/dvb/dvb-usb/dvb_usb_init.c @@ -431,11 +431,24 @@ static void dvb_usbv2_init_work(struct work_struct *work) KBUILD_MODNAME, d->name); ret = dvb_usbv2_download_firmware(d); if (ret == 0) { + /* device is warm, continue initialization */ ; } else if (ret == RECONNECTS_USB) { - ret = 0; - goto exit_usb_driver_release_interface; + /* + * USB core will call disconnect() and then probe() + * as device reconnects itself from the USB bus. + * disconnect() will release all driver resources + * and probe() is called for 'new' device. As 'new' + * device is warm we should never go here again. + */ + return; } else { + /* Unexpected fatal error. We must unregister driver + * manually from the device, because device is already + * register by returning from probe() with success. + * usb_driver_release_interface() finally calls + * disconnect() in order to free resources. + */ goto err_usb_driver_release_interface; } } @@ -453,8 +466,7 @@ static void dvb_usbv2_init_work(struct work_struct *work) err_usb_driver_release_interface: pr_info("%s: '%s' error while loading driver (%d)\n", KBUILD_MODNAME, d->name, ret); -exit_usb_driver_release_interface: - /* it finally calls .disconnect() which frees mem */ + /* it finally calls disconnect() which frees mem */ usb_driver_release_interface(to_usb_driver(d->intf->dev.driver), d->intf); pr_debug("%s: failed=%d\n", __func__, ret); -- 2.7.4