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Commit 8130eca2 authored by Mark W. McClelland's avatar Mark W. McClelland Committed by Greg Kroah-Hartman
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[PATCH] USB: ov511 bugfixes/cleanup 

This patch updates the 2.5 ov511 driver to version 1.64. This fixes some
longstanding bugs and cleans the code up a bit.

Changes:
 - Eliminate remaining uses of sleep_on()
 - Remove unnecessary (and racy) calls to waitqueue_active()
 - Fix a memory leak in the open() error path
 - Remove some redundant and unused variables
 - Documentation fixes
parent d71942e8
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Showing with 58 additions and 69 deletions
drivers/usb/media/ov511.c
View file @ 8130eca2
/*
* OmniVision OV511 Camera-to-USB Bridge Driver
*
* Copyright (c) 1999-2002 Mark W. McClelland
* Copyright (c) 1999-2003 Mark W. McClelland
* Original decompression code Copyright 1998-2000 OmniVision Technologies
* Many improvements by Bret Wallach <bwallac1@san.rr.com>
* Color fixes by by Orion Sky Lawlor <olawlor@acm.org> (2/26/2000)
......@@ -60,7 +60,7 @@
/*
* Version Information
*/
#define DRIVER_VERSION "v1.63 for Linux 2.5"
#define DRIVER_VERSION "v1.64 for Linux 2.5"
#define EMAIL "mark@alpha.dyndns.org"
#define DRIVER_AUTHOR "Mark McClelland <mark@alpha.dyndns.org> & Bret Wallach \
& Orion Sky Lawlor <olawlor@acm.org> & Kevin Moore & Charl P. Botha \
......@@ -137,7 +137,7 @@ MODULE_PARM_DESC(snapshot, "Enable snapshot mode");
MODULE_PARM(cams, "i");
MODULE_PARM_DESC(cams, "Number of simultaneous cameras");
MODULE_PARM(compress, "i");
MODULE_PARM_DESC(compress, "Turn on compression (not reliable yet)");
MODULE_PARM_DESC(compress, "Turn on compression");
MODULE_PARM(testpat, "i");
MODULE_PARM_DESC(testpat,
"Replace image with vertical bar testpattern (only partially working)");
......@@ -1349,6 +1349,13 @@ ov51x_restart(struct usb_ov511 *ov)
return 0;
}
/* Sleeps until no frames are active. Returns !0 if got signal */
static int
ov51x_wait_frames_inactive(struct usb_ov511 *ov)
{
return wait_event_interruptible(ov->wq, ov->curframe < 0);
}
/* Resets the hardware snapshot button */
static void
ov51x_clear_snapshot(struct usb_ov511 *ov)
......@@ -2121,7 +2128,7 @@ sensor_get_exposure(struct usb_ov511 *ov, unsigned char *val)
return 0;
}
#endif /* CONFIG_PROC_FS && CONFIG_VIDEO_PROC_FS */
#endif /* CONFIG_VIDEO_PROC_FS */
/* Turns on or off the LED. Only has an effect with OV511+/OV518(+) */
static void
......@@ -2486,8 +2493,6 @@ mode_init_ov_sensor_regs(struct usb_ov511 *ov, int width, int height,
/******** Clock programming ********/
// FIXME: Test this with OV6630
/* The OV6620 needs special handling. This prevents the
* severe banding that normally occurs */
if (ov->sensor == SEN_OV6620 || ov->sensor == SEN_OV6630)
......@@ -2995,6 +3000,7 @@ ov51x_set_default_params(struct usb_ov511 *ov)
ov->frame[i].format = force_palette;
else
ov->frame[i].format = VIDEO_PALETTE_YUV420;
ov->frame[i].depth = get_depth(ov->frame[i].format);
}
......@@ -3577,12 +3583,8 @@ ov511_move_data(struct usb_ov511 *ov, unsigned char *in, int n)
if (frame->scanstate == STATE_LINES) {
int nextf;
frame->grabstate = FRAME_DONE; // FIXME: Is this right?
if (waitqueue_active(&frame->wq)) {
frame->grabstate = FRAME_DONE;
wake_up_interruptible(&frame->wq);
}
/* If next frame is ready or grabbing,
* point to it */
......@@ -3747,12 +3749,8 @@ ov518_move_data(struct usb_ov511 *ov, unsigned char *in, int n)
if (frame->scanstate == STATE_LINES) {
int nextf;
frame->grabstate = FRAME_DONE; // FIXME: Is this right?
if (waitqueue_active(&frame->wq)) {
frame->grabstate = FRAME_DONE;
wake_up_interruptible(&frame->wq);
}
/* If next frame is ready or grabbing,
* point to it */
......@@ -4228,7 +4226,7 @@ ov51x_alloc(struct usb_ov511 *ov)
}
static void
ov51x_dealloc(struct usb_ov511 *ov, int now)
ov51x_dealloc(struct usb_ov511 *ov)
{
PDEBUG(4, "entered");
down(&ov->buf_lock);
......@@ -4258,10 +4256,6 @@ ov51x_v4l1_open(struct inode *inode, struct file *file)
if (ov->user)
goto out;
err = ov51x_alloc(ov);
if (err < 0)
goto out;
ov->sub_flag = 0;
/* In case app doesn't set them... */
......@@ -4283,9 +4277,13 @@ ov51x_v4l1_open(struct inode *inode, struct file *file)
goto out;
}
err = ov51x_alloc(ov);
if (err < 0)
goto out;
err = ov51x_init_isoc(ov);
if (err) {
ov51x_dealloc(ov, 0);
ov51x_dealloc(ov);
goto out;
}
......@@ -4319,7 +4317,7 @@ ov51x_v4l1_close(struct inode *inode, struct file *file)
ov51x_led_control(ov, 0);
if (ov->dev)
ov51x_dealloc(ov, 0);
ov51x_dealloc(ov);
up(&ov->lock);
......@@ -4331,7 +4329,7 @@ ov51x_v4l1_close(struct inode *inode, struct file *file)
ov->cbuf = NULL;
up(&ov->cbuf_lock);
ov51x_dealloc(ov, 1);
ov51x_dealloc(ov);
kfree(ov);
ov = NULL;
}
......@@ -4449,7 +4447,7 @@ ov51x_v4l1_ioctl_internal(struct inode *inode, struct file *file,
case VIDIOCSPICT:
{
struct video_picture *p = arg;
int i;
int i, rc;
PDEBUG(4, "VIDIOCSPICT");
......@@ -4469,10 +4467,9 @@ ov51x_v4l1_ioctl_internal(struct inode *inode, struct file *file,
if (p->palette != ov->frame[0].format) {
PDEBUG(4, "Detected format change");
/* If we're collecting previous frame wait
before changing modes */
interruptible_sleep_on(&ov->wq);
if (signal_pending(current)) return -EINTR;
rc = ov51x_wait_frames_inactive(ov);
if (rc)
return rc;
mode_init_regs(ov, ov->frame[0].width,
ov->frame[0].height, p->palette, ov->sub_flag);
......@@ -4530,7 +4527,7 @@ ov51x_v4l1_ioctl_internal(struct inode *inode, struct file *file,
case VIDIOCSWIN:
{
struct video_window *vw = arg;
int i, result;
int i, rc;
PDEBUG(4, "VIDIOCSWIN: %dx%d", vw->width, vw->height);
......@@ -4545,15 +4542,14 @@ ov51x_v4l1_ioctl_internal(struct inode *inode, struct file *file,
return -EINVAL;
#endif
/* If we're collecting previous frame wait
before changing modes */
interruptible_sleep_on(&ov->wq);
if (signal_pending(current)) return -EINTR;
rc = ov51x_wait_frames_inactive(ov);
if (rc)
return rc;
result = mode_init_regs(ov, vw->width, vw->height,
rc = mode_init_regs(ov, vw->width, vw->height,
ov->frame[0].format, ov->sub_flag);
if (result < 0)
return result;
if (rc < 0)
return rc;
for (i = 0; i < OV511_NUMFRAMES; i++) {
ov->frame[i].width = vw->width;
......@@ -4600,7 +4596,7 @@ ov51x_v4l1_ioctl_internal(struct inode *inode, struct file *file,
case VIDIOCMCAPTURE:
{
struct video_mmap *vm = arg;
int ret, depth;
int rc, depth;
unsigned int f = vm->frame;
PDEBUG(4, "VIDIOCMCAPTURE: frame: %d, %dx%d, %s", f, vm->width,
......@@ -4642,14 +4638,14 @@ ov51x_v4l1_ioctl_internal(struct inode *inode, struct file *file,
(ov->frame[f].depth != depth)) {
PDEBUG(4, "VIDIOCMCAPTURE: change in image parameters");
/* If we're collecting previous frame wait
before changing modes */
interruptible_sleep_on(&ov->wq);
if (signal_pending(current)) return -EINTR;
ret = mode_init_regs(ov, vm->width, vm->height,
rc = ov51x_wait_frames_inactive(ov);
if (rc)
return rc;
rc = mode_init_regs(ov, vm->width, vm->height,
vm->format, ov->sub_flag);
#if 0
if (ret < 0) {
if (rc < 0) {
PDEBUG(1, "Got error while initializing regs ");
return ret;
}
......@@ -4702,18 +4698,15 @@ ov51x_v4l1_ioctl_internal(struct inode *inode, struct file *file,
return rc;
if (frame->grabstate == FRAME_ERROR) {
int ret;
if ((ret = ov51x_new_frame(ov, fnum)) < 0)
return ret;
if ((rc = ov51x_new_frame(ov, fnum)) < 0)
return rc;
goto redo;
}
/* Fall through */
case FRAME_DONE:
if (ov->snap_enabled && !frame->snapshot) {
int ret;
if ((ret = ov51x_new_frame(ov, fnum)) < 0)
return ret;
if ((rc = ov51x_new_frame(ov, fnum)) < 0)
return rc;
goto redo;
}
......@@ -6089,7 +6082,6 @@ ov518_configure(struct usb_ov511 *ov)
return -EBUSY;
}
/****************************************************************************
*
* USB routines
......@@ -6097,11 +6089,10 @@ ov518_configure(struct usb_ov511 *ov)
***************************************************************************/
static int
ov51x_probe(struct usb_interface *intf,
const struct usb_device_id *id)
ov51x_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_interface_descriptor *interface;
struct usb_interface_descriptor *idesc;
struct usb_ov511 *ov;
int i;
int registered = 0;
......@@ -6112,12 +6103,11 @@ ov51x_probe(struct usb_interface *intf,
if (dev->descriptor.bNumConfigurations != 1)
return -ENODEV;
interface = &intf->altsetting[0].desc;
idesc = &intf->altsetting[0].desc;
/* Checking vendor/product should be enough, but what the hell */
if (interface->bInterfaceClass != 0xFF)
if (idesc->bInterfaceClass != 0xFF)
return -ENODEV;
if (interface->bInterfaceSubClass != 0x00)
if (idesc->bInterfaceSubClass != 0x00)
return -ENODEV;
if ((ov = kmalloc(sizeof(*ov), GFP_KERNEL)) == NULL) {
......@@ -6128,7 +6118,7 @@ ov51x_probe(struct usb_interface *intf,
memset(ov, 0, sizeof(*ov));
ov->dev = dev;
ov->iface = interface->bInterfaceNumber;
ov->iface = idesc->bInterfaceNumber;
ov->led_policy = led;
ov->compress = compress;
ov->lightfreq = lightfreq;
......@@ -6272,7 +6262,7 @@ ov51x_probe(struct usb_interface *intf,
error_out:
err("Camera initialization failed");
return -ENOMEM;
return -EIO;
}
static void
......@@ -6284,6 +6274,7 @@ ov51x_disconnect(struct usb_interface *intf)
PDEBUG(3, "");
usb_set_intfdata (intf, NULL);
if (!ov)
return;
......@@ -6298,9 +6289,8 @@ ov51x_disconnect(struct usb_interface *intf)
/* This will cause the process to request another frame */
for (n = 0; n < OV511_NUMFRAMES; n++)
if (waitqueue_active(&ov->frame[n].wq))
wake_up_interruptible(&ov->frame[n].wq);
if (waitqueue_active(&ov->wq))
wake_up_interruptible(&ov->wq);
ov->streaming = 0;
......@@ -6317,7 +6307,7 @@ ov51x_disconnect(struct usb_interface *intf)
ov->cbuf = NULL;
up(&ov->cbuf_lock);
ov51x_dealloc(ov, 1);
ov51x_dealloc(ov);
kfree(ov);
ov = NULL;
}
......@@ -6333,7 +6323,6 @@ static struct usb_driver ov511_driver = {
.disconnect = ov51x_disconnect
};
/****************************************************************************
*
* Module routines
......
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