From 89a47942f0facc4664d982005ac03d8dcb9635c1 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Sun, 14 Oct 2007 02:52:17 -0300 Subject: [PATCH] V4L/DVB (6335): cx8802: Replace list_for_each+list_entry with list_for_each_entry Less code and more efficient. Got ride of a variable that counted the number of devices in cx8802_unregister_driver() but was never used. Looked leftover from a cut&paste. Signed-off-by: Trent Piepho Reviewed-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx88/cx88-mpeg.c | 85 ++++++++++------------------ 1 file changed, 29 insertions(+), 56 deletions(-) diff --git a/drivers/media/video/cx88/cx88-mpeg.c b/drivers/media/video/cx88/cx88-mpeg.c index 11d9865e34..d4858e4c3e 100644 --- a/drivers/media/video/cx88/cx88-mpeg.c +++ b/drivers/media/video/cx88/cx88-mpeg.c @@ -178,7 +178,6 @@ static int cx8802_restart_queue(struct cx8802_dev *dev, struct cx88_dmaqueue *q) { struct cx88_buffer *buf; - struct list_head *item; dprintk( 1, "cx8802_restart_queue\n" ); if (list_empty(&q->active)) @@ -224,10 +223,8 @@ static int cx8802_restart_queue(struct cx8802_dev *dev, dprintk(2,"restart_queue [%p/%d]: restart dma\n", buf, buf->vb.i); cx8802_start_dma(dev, q, buf); - list_for_each(item,&q->active) { - buf = list_entry(item, struct cx88_buffer, vb.queue); + list_for_each_entry(buf, &q->active, vb.queue) buf->count = q->count++; - } mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT); return 0; } @@ -578,14 +575,11 @@ int cx8802_resume_common(struct pci_dev *pci_dev) struct cx8802_dev * cx8802_get_device(struct inode *inode) { int minor = iminor(inode); - struct cx8802_dev *h = NULL; - struct list_head *list; + struct cx8802_dev *dev; - list_for_each(list,&cx8802_devlist) { - h = list_entry(list, struct cx8802_dev, devlist); - if (h->mpeg_dev && h->mpeg_dev->minor == minor) - return h; - } + list_for_each_entry(dev, &cx8802_devlist, devlist) + if (dev->mpeg_dev && dev->mpeg_dev->minor == minor) + return dev; return NULL; } @@ -595,14 +589,10 @@ EXPORT_SYMBOL(cx8802_get_device); struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype) { struct cx8802_driver *d; - struct list_head *list; - - list_for_each(list, &dev->drvlist) { - d = list_entry(list, struct cx8802_driver, drvlist); + list_for_each_entry(d, &dev->drvlist, drvlist) if (d->type_id == btype) return d; - } return NULL; } @@ -666,10 +656,9 @@ static int cx8802_check_driver(struct cx8802_driver *drv) int cx8802_register_driver(struct cx8802_driver *drv) { - struct cx8802_dev *h; + struct cx8802_dev *dev; struct cx8802_driver *driver; - struct list_head *list; - int err = 0, i = 0; + int err, i = 0; printk(KERN_INFO "cx88/2: registering cx8802 driver, type: %s access: %s\n", @@ -681,14 +670,12 @@ int cx8802_register_driver(struct cx8802_driver *drv) return err; } - list_for_each(list,&cx8802_devlist) { - h = list_entry(list, struct cx8802_dev, devlist); - + list_for_each_entry(dev, &cx8802_devlist, devlist) { printk(KERN_INFO "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n", - h->core->name, h->pci->subsystem_vendor, - h->pci->subsystem_device, h->core->board.name, - h->core->boardnr); + dev->core->name, dev->pci->subsystem_vendor, + dev->pci->subsystem_device, dev->core->board.name, + dev->core->boardnr); /* Bring up a new struct for each driver instance */ driver = kzalloc(sizeof(*drv),GFP_KERNEL); @@ -696,7 +683,7 @@ int cx8802_register_driver(struct cx8802_driver *drv) return -ENOMEM; /* Snapshot of the driver registration data */ - drv->core = h->core; + drv->core = dev->core; drv->suspend = cx8802_suspend_common; drv->resume = cx8802_resume_common; drv->request_acquire = cx8802_request_acquire; @@ -707,49 +694,38 @@ int cx8802_register_driver(struct cx8802_driver *drv) if (err == 0) { i++; mutex_lock(&drv->core->lock); - list_add_tail(&driver->drvlist, &h->drvlist); + list_add_tail(&driver->drvlist, &dev->drvlist); mutex_unlock(&drv->core->lock); } else { printk(KERN_ERR "%s/2: cx8802 probe failed, err = %d\n", - h->core->name, err); + dev->core->name, err); } } - if (i == 0) - err = -ENODEV; - else - err = 0; - return err; + return i ? 0 : -ENODEV; } int cx8802_unregister_driver(struct cx8802_driver *drv) { - struct cx8802_dev *h; - struct cx8802_driver *d; - struct list_head *list; - struct list_head *list2, *q; - int err = 0, i = 0; + struct cx8802_dev *dev; + struct cx8802_driver *d, *dtmp; + int err = 0; printk(KERN_INFO "cx88/2: unregistering cx8802 driver, type: %s access: %s\n", drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird", drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive"); - list_for_each(list,&cx8802_devlist) { - i++; - h = list_entry(list, struct cx8802_dev, devlist); - + list_for_each_entry(dev, &cx8802_devlist, devlist) { printk(KERN_INFO "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n", - h->core->name, h->pci->subsystem_vendor, - h->pci->subsystem_device, h->core->board.name, - h->core->boardnr); - - list_for_each_safe(list2, q, &h->drvlist) { - d = list_entry(list2, struct cx8802_driver, drvlist); + dev->core->name, dev->pci->subsystem_vendor, + dev->pci->subsystem_device, dev->core->board.name, + dev->core->boardnr); + list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) { /* only unregister the correct driver type */ if (d->type_id != drv->type_id) continue; @@ -757,11 +733,11 @@ int cx8802_unregister_driver(struct cx8802_driver *drv) err = d->remove(d); if (err == 0) { mutex_lock(&drv->core->lock); - list_del(list2); + list_del(&d->drvlist); mutex_unlock(&drv->core->lock); } else printk(KERN_ERR "%s/2: cx8802 driver remove " - "failed (%d)\n", h->core->name, err); + "failed (%d)\n", dev->core->name, err); } } @@ -825,21 +801,18 @@ static void __devexit cx8802_remove(struct pci_dev *pci_dev) dprintk( 1, "%s\n", __FUNCTION__); if (!list_empty(&dev->drvlist)) { - struct list_head *list, *tmp; - struct cx8802_driver *drv; + struct cx8802_driver *drv, *tmp; int err; printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver " "while cx8802 sub-drivers still loaded?!\n", dev->core->name); - list_for_each_safe(list, tmp, &dev->drvlist) { - drv = list_entry(list, struct cx8802_driver, drvlist); - + list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) { err = drv->remove(drv); if (err == 0) { mutex_lock(&drv->core->lock); - list_del(list); + list_del(&drv->drvlist); mutex_unlock(&drv->core->lock); } else printk(KERN_ERR "%s/2: cx8802 driver remove " -- 2.39.5