From cf32b65d0589cdbe9bc4cc7081f13ebbae11308c Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ezequiel=20Garc=C3=ADa?= Date: Fri, 24 Feb 2012 11:24:20 -0300 Subject: [PATCH] [media] staging: easycap: Clean comment style in easycap_usb_disconnect() Signed-off-by: Ezequiel Garcia Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/easycap/easycap_main.c | 64 ++++++++------------ 1 file changed, 24 insertions(+), 40 deletions(-) diff --git a/drivers/staging/media/easycap/easycap_main.c b/drivers/staging/media/easycap/easycap_main.c index 6e1734d8d276..de53ed825f2c 100644 --- a/drivers/staging/media/easycap/easycap_main.c +++ b/drivers/staging/media/easycap/easycap_main.c @@ -3973,15 +3973,13 @@ static int easycap_usb_probe(struct usb_interface *intf, SAM("ends successfully for interface %i\n", bInterfaceNumber); return 0; } -/*****************************************************************************/ -/*---------------------------------------------------------------------------*/ + /* - * WHEN THIS FUNCTION IS CALLED THE EasyCAP HAS ALREADY BEEN PHYSICALLY - * UNPLUGGED. HENCE peasycap->pusb_device IS NO LONGER VALID. - * - * THIS FUNCTION AFFECTS ALSA. BEWARE. + * When this function is called the device has already been + * physically unplugged. + * Hence, peasycap->pusb_device is no longer valid. + * This function affects alsa. */ -/*---------------------------------------------------------------------------*/ static void easycap_usb_disconnect(struct usb_interface *pusb_interface) { struct usb_host_interface *pusb_host_interface; @@ -4006,6 +4004,7 @@ static void easycap_usb_disconnect(struct usb_interface *pusb_interface) minor = pusb_interface->minor; JOT(4, "intf[%i]: minor=%i\n", bInterfaceNumber, minor); + /* There is nothing to do for Interface Number 1 */ if (1 == bInterfaceNumber) return; @@ -4014,11 +4013,8 @@ static void easycap_usb_disconnect(struct usb_interface *pusb_interface) SAY("ERROR: peasycap is NULL\n"); return; } -/*---------------------------------------------------------------------------*/ -/* - * IF THE WAIT QUEUES ARE NOT CLEARED A DEADLOCK IS POSSIBLE. BEWARE. -*/ -/*---------------------------------------------------------------------------*/ + + /* If the waitqueues are not cleared a deadlock is possible */ peasycap->video_eof = 1; peasycap->audio_eof = 1; wake_up_interruptible(&(peasycap->wq_video)); @@ -4034,15 +4030,14 @@ static void easycap_usb_disconnect(struct usb_interface *pusb_interface) default: break; } -/*--------------------------------------------------------------------------*/ -/* - * DEREGISTER - * - * THIS PROCEDURE WILL BLOCK UNTIL easycap_poll(), VIDEO IOCTL AND AUDIO - * IOCTL ARE ALL UNLOCKED. IF THIS IS NOT DONE AN Oops CAN OCCUR WHEN - * AN EasyCAP IS UNPLUGGED WHILE THE URBS ARE RUNNING. BEWARE. - */ -/*--------------------------------------------------------------------------*/ + + /* + * Deregister + * This procedure will block until easycap_poll(), + * video and audio ioctl are all unlocked. + * If this is not done an oops can occur when an easycap + * is unplugged while the urbs are running. + */ kd = easycap_isdongle(peasycap); switch (bInterfaceNumber) { case 0: { @@ -4059,7 +4054,6 @@ static void easycap_usb_disconnect(struct usb_interface *pusb_interface) } else { SAY("ERROR: %i=kd is bad: cannot lock dongle\n", kd); } -/*---------------------------------------------------------------------------*/ if (!peasycap->v4l2_device.name[0]) { SAM("ERROR: peasycap->v4l2_device.name is empty\n"); if (0 <= kd && DONGLE_MANY > kd) @@ -4075,7 +4069,6 @@ static void easycap_usb_disconnect(struct usb_interface *pusb_interface) JOM(4, "intf[%i]: video_unregister_device() minor=%i\n", bInterfaceNumber, minor); peasycap->registered_video--; -/*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ if (0 <= kd && DONGLE_MANY > kd) { mutex_unlock(&easycapdc60_dongle[kd].mutex_video); @@ -4111,12 +4104,12 @@ static void easycap_usb_disconnect(struct usb_interface *pusb_interface) default: break; } -/*---------------------------------------------------------------------------*/ -/* - * CALL easycap_delete() IF NO REMAINING REFERENCES TO peasycap - * (ALSO WHEN ALSA HAS BEEN IN USE) - */ -/*---------------------------------------------------------------------------*/ + + /* + * If no remaining references to peasycap, + * call easycap_delete. + * (Also when alsa has been in use) + */ if (!peasycap->kref.refcount.counter) { SAM("ERROR: peasycap->kref.refcount.counter is zero " "so cannot call kref_put()\n"); @@ -4151,17 +4144,11 @@ static void easycap_usb_disconnect(struct usb_interface *pusb_interface) mutex_unlock(&easycapdc60_dongle[kd].mutex_video); JOT(4, "unlocked dongle[%i].mutex_video\n", kd); } -/*---------------------------------------------------------------------------*/ JOM(4, "ends\n"); return; } -/*****************************************************************************/ -/*---------------------------------------------------------------------------*/ -/* - * PARAMETERS APPLICABLE TO ENTIRE DRIVER, I.E. BOTH VIDEO AND AUDIO - */ -/*---------------------------------------------------------------------------*/ +/* Devices supported by this driver */ static struct usb_device_id easycap_usb_device_id_table[] = { {USB_DEVICE(USB_EASYCAP_VENDOR_ID, USB_EASYCAP_PRODUCT_ID)}, { } @@ -4196,14 +4183,11 @@ static int __init easycap_module_init(void) return rc; } -/*****************************************************************************/ + static void __exit easycap_module_exit(void) { usb_deregister(&easycap_usb_driver); } -/*****************************************************************************/ module_init(easycap_module_init); module_exit(easycap_module_exit); - -/*****************************************************************************/ -- 2.30.2