Also improve the comments.
Signed-off-by: Frank Schäfer <fschaefer....@googlemail.com>
---
drivers/media/usb/em28xx/em28xx-cards.c | 20 +++++++++++---------
drivers/media/usb/em28xx/em28xx-core.c | 8 ++++----
drivers/media/usb/em28xx/em28xx-dvb.c | 4 ++--
drivers/media/usb/em28xx/em28xx-video.c | 2 +-
drivers/media/usb/em28xx/em28xx.h | 14 ++++++++------
5 Dateien geändert, 26 Zeilen hinzugefügt(+), 22 Zeilen entfernt(-)
diff --git a/drivers/media/usb/em28xx/em28xx-cards.c
b/drivers/media/usb/em28xx/em28xx-cards.c
index e0d03a1..d73b2b1 100644
--- a/drivers/media/usb/em28xx/em28xx-cards.c
+++ b/drivers/media/usb/em28xx/em28xx-cards.c
@@ -3174,9 +3174,10 @@ static int em28xx_usb_probe(struct usb_interface
*interface,
}
/* compute alternate max packet sizes */
- dev->alt_max_pkt_size = kmalloc(sizeof(dev->alt_max_pkt_size[0]) *
+ dev->alt_max_pkt_size_isoc =
+ kmalloc(sizeof(dev->alt_max_pkt_size_isoc[0]) *
interface->num_altsetting, GFP_KERNEL);
- if (dev->alt_max_pkt_size == NULL) {
+ if (dev->alt_max_pkt_size_isoc == NULL) {
em28xx_errdev("out of memory!\n");
kfree(dev);
retval = -ENOMEM;
@@ -3207,13 +3208,14 @@ static int em28xx_usb_probe(struct usb_interface
*interface,
break;
case EM28XX_EP_ANALOG:
has_video = true;
- dev->alt_max_pkt_size[i] = size;
+ dev->alt_max_pkt_size_isoc[i] = size;
break;
case EM28XX_EP_DIGITAL:
has_dvb = true;
- if (size > dev->dvb_max_pkt_size) {
- dev->dvb_max_pkt_size = size;
- dev->dvb_alt = i;
+ if (size > dev->dvb_max_pkt_size_isoc) {
+ dev->dvb_max_pkt_size_isoc =
+ size;
+ dev->dvb_alt_isoc = i;
}
break;
}
@@ -3315,7 +3317,7 @@ static int em28xx_usb_probe(struct usb_interface
*interface,
/* pre-allocate DVB isoc transfer buffers */
retval = em28xx_alloc_urbs(dev, EM28XX_DIGITAL_MODE, 0,
EM28XX_DVB_NUM_BUFS,
- dev->dvb_max_pkt_size,
+ dev->dvb_max_pkt_size_isoc,
EM28XX_DVB_NUM_ISOC_PACKETS);
if (retval) {
goto unlock_and_free;
@@ -3335,7 +3337,7 @@ unlock_and_free:
mutex_unlock(&dev->lock);
err_free:
- kfree(dev->alt_max_pkt_size);
+ kfree(dev->alt_max_pkt_size_isoc);
kfree(dev);
err:
@@ -3400,7 +3402,7 @@ static void em28xx_usb_disconnect(struct usb_interface
*interface)
em28xx_close_extension(dev);
if (!dev->users) {
- kfree(dev->alt_max_pkt_size);
+ kfree(dev->alt_max_pkt_size_isoc);
kfree(dev);
}
}
diff --git a/drivers/media/usb/em28xx/em28xx-core.c
b/drivers/media/usb/em28xx/em28xx-core.c
index 8b8f783..6b588e2 100644
--- a/drivers/media/usb/em28xx/em28xx-core.c
+++ b/drivers/media/usb/em28xx/em28xx-core.c
@@ -830,14 +830,14 @@ int em28xx_set_alternate(struct em28xx *dev)
for (i = 0; i < dev->num_alt; i++) {
/* stop when the selected alt setting offers enough bandwidth */
- if (dev->alt_max_pkt_size[i] >= min_pkt_size) {
+ if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) {
dev->alt = i;
break;
/* otherwise make sure that we end up with the maximum bandwidth
because the min_pkt_size equation might be wrong...
*/
- } else if (dev->alt_max_pkt_size[i] >
- dev->alt_max_pkt_size[dev->alt])
+ } else if (dev->alt_max_pkt_size_isoc[i] >
+ dev->alt_max_pkt_size_isoc[dev->alt])
dev->alt = i;
}
@@ -845,7 +845,7 @@ set_alt:
if (dev->alt != prev_alt) {
em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
min_pkt_size, dev->alt);
- dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt];
+ dev->max_pkt_size = dev->alt_max_pkt_size_isoc[dev->alt];
em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
dev->alt, dev->max_pkt_size);
errCode = usb_set_interface(dev->udev, 0, dev->alt);
diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c
b/drivers/media/usb/em28xx/em28xx-dvb.c
index cd36a67..2d56c93 100644
--- a/drivers/media/usb/em28xx/em28xx-dvb.c
+++ b/drivers/media/usb/em28xx/em28xx-dvb.c
@@ -178,12 +178,12 @@ static int em28xx_start_streaming(struct em28xx_dvb *dvb)
struct em28xx *dev = dvb->adapter.priv;
int max_dvb_packet_size;
- usb_set_interface(dev->udev, 0, dev->dvb_alt);
+ usb_set_interface(dev->udev, 0, dev->dvb_alt_isoc);
rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
if (rc < 0)
return rc;
- max_dvb_packet_size = dev->dvb_max_pkt_size;
+ max_dvb_packet_size = dev->dvb_max_pkt_size_isoc;
if (max_dvb_packet_size < 0)
return max_dvb_packet_size;
dprintk(1, "Using %d buffers each with %d x %d bytes\n",
diff --git a/drivers/media/usb/em28xx/em28xx-video.c
b/drivers/media/usb/em28xx/em28xx-video.c
index f435206..8767c06 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -2286,7 +2286,7 @@ static int em28xx_v4l2_close(struct file *filp)
free the remaining resources */
if (dev->state & DEV_DISCONNECTED) {
em28xx_release_resources(dev);
- kfree(dev->alt_max_pkt_size);
+ kfree(dev->alt_max_pkt_size_isoc);
mutex_unlock(&dev->lock);
kfree(dev);
kfree(fh);
diff --git a/drivers/media/usb/em28xx/em28xx.h
b/drivers/media/usb/em28xx/em28xx.h
index e311b09..8b96413 100644
--- a/drivers/media/usb/em28xx/em28xx.h
+++ b/drivers/media/usb/em28xx/em28xx.h
@@ -4,6 +4,7 @@
Copyright (C) 2005 Markus Rechberger <mrechber...@gmail.com>
Ludovico Cavedon <cave...@sssup.it>
Mauro Carvalho Chehab <mche...@infradead.org>
+ Copyright (C) 2012 Frank Schäfer <fschaefer....@googlemail.com>
Based on the em2800 driver from Sascha Sommer <saschasom...@freenet.de>
@@ -582,12 +583,13 @@ struct em28xx {
/* usb transfer */
struct usb_device *udev; /* the usb device */
- int alt; /* alternate */
- int max_pkt_size; /* max packet size of isoc transaction */
- int num_alt; /* Number of alternative settings */
- unsigned int *alt_max_pkt_size; /* array of wMaxPacketSize */
- int dvb_alt; /* alternate for DVB */
- unsigned int dvb_max_pkt_size; /* wMaxPacketSize for DVB */
+ int alt; /* alternate setting */
+ int max_pkt_size; /* max packet size of the selected ep at alt */
+ int num_alt; /* number of alternative settings */
+ unsigned int *alt_max_pkt_size_isoc; /* array of isoc wMaxPacketSize */
+ int dvb_alt_isoc; /* alternate setting for DVB isoc transfers */
+ unsigned int dvb_max_pkt_size_isoc; /* isoc max packet size of the
+ selected DVB ep at dvb_alt */
char urb_buf[URB_MAX_CTRL_SIZE]; /* urb control msg buffer */
/* helper funcs that call usb_control_msg */
--
1.7.10.4
--
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