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media: media/saa7146: Convert timers to use timer_setup()

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In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. This requires adding a pointer to
hold the timer's target file, as there won't be a way to pass this in the
future.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Kees Cook 2017-10-16 19:10:12 -04:00 committed by Mauro Carvalho Chehab
parent 82fad47625
commit 3e3149173f
3 changed files with 7 additions and 5 deletions
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2
drivers/media/common/saa7146/saa7146_fops.c
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@ -559,7 +559,7 @@ int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
vbi->start[1] = 312;
vbi->count[1] = 16;
init_timer(&vv->vbi_read_timeout);
timer_setup(&vv->vbi_read_timeout, NULL, 0);
vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING;
vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY;

9
drivers/media/common/saa7146/saa7146_vbi.c
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@ -348,9 +348,10 @@ static void vbi_stop(struct saa7146_fh *fh, struct file *file)
spin_unlock_irqrestore(&dev->slock, flags);
}
static void vbi_read_timeout(unsigned long data)
static void vbi_read_timeout(struct timer_list *t)
{
struct file *file = (struct file*)data;
struct saa7146_vv *vv = from_timer(vv, t, vbi_read_timeout);
struct file *file = vv->vbi_read_timeout_file;
struct saa7146_fh *fh = file->private_data;
struct saa7146_dev *dev = fh->dev;
@ -401,8 +402,8 @@ static int vbi_open(struct saa7146_dev *dev, struct file *file)
sizeof(struct saa7146_buf),
file, &dev->v4l2_lock);
vv->vbi_read_timeout.function = vbi_read_timeout;
vv->vbi_read_timeout.data = (unsigned long)file;
vv->vbi_read_timeout.function = (TIMER_FUNC_TYPE)vbi_read_timeout;
vv->vbi_read_timeout_file = file;
/* initialize the brs */
if ( 0 != (SAA7146_USE_PORT_B_FOR_VBI & dev->ext_vv_data->flags)) {

1
include/media/drv-intf/saa7146_vv.h
View File

@ -107,6 +107,7 @@ struct saa7146_vv
struct saa7146_dmaqueue vbi_dmaq;
struct v4l2_vbi_format vbi_fmt;
struct timer_list vbi_read_timeout;
struct file *vbi_read_timeout_file;
/* vbi workaround interrupt queue */
wait_queue_head_t vbi_wq;
int vbi_fieldcount;