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Date: Mon, 30 Oct 2017 10:39:39 +0100
From: Hans Verkuil <hverkuil@...all.nl>
To: Kees Cook <keescook@...omium.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Andy Walls <awalls@...metrocast.net>,
Sergey Kozlov <serjk@...up.ru>, Abylay Ospan <aospan@...up.ru>,
Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
Hans Verkuil <hansverk@...co.com>,
Arvind Yadav <arvind.yadav.cs@...il.com>,
Geliang Tang <geliangtang@...il.com>,
Sean Young <sean@...s.org>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Pali Rohár <pali.rohar@...il.com>,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: pci: Convert timers to use timer_setup()
Hi Kees,
On 10/24/2017 05:22 PM, Kees Cook wrote:
> 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.
>
> Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
> Cc: Andy Walls <awalls@...metrocast.net>
> Cc: Sergey Kozlov <serjk@...up.ru>
> Cc: Abylay Ospan <aospan@...up.ru>
> Cc: Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
> Cc: Hans Verkuil <hansverk@...co.com>
> Cc: Arvind Yadav <arvind.yadav.cs@...il.com>
> Cc: Geliang Tang <geliangtang@...il.com>
> Cc: Sean Young <sean@...s.org>
> Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>
> Cc: "Pali Rohár" <pali.rohar@...il.com>
> Cc: linux-media@...r.kernel.org
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---
> drivers/media/pci/bt8xx/bttv-driver.c | 6 +++---
> drivers/media/pci/bt8xx/bttv-input.c | 19 ++++++++++---------
> drivers/media/pci/bt8xx/bttvp.h | 1 +
> drivers/media/pci/cx18/cx18-fileops.c | 4 ++--
> drivers/media/pci/cx18/cx18-fileops.h | 2 +-
> drivers/media/pci/cx18/cx18-streams.c | 2 +-
> drivers/media/pci/ivtv/ivtv-driver.c | 3 +--
> drivers/media/pci/ivtv/ivtv-irq.c | 4 ++--
> drivers/media/pci/ivtv/ivtv-irq.h | 2 +-
> drivers/media/pci/netup_unidvb/netup_unidvb_core.c | 7 +++----
> drivers/media/pci/ttpci/av7110_ir.c | 7 +++----
FYI: I'm merging all except for this av7110_ir.c patch.
There are a number of other patches that appear to address this and I think
this driver should be handled separately.
Regards,
Hans
> drivers/media/pci/tw686x/tw686x-core.c | 7 +++----
> 12 files changed, 31 insertions(+), 33 deletions(-)
>
> diff --git a/drivers/media/pci/bt8xx/bttv-driver.c b/drivers/media/pci/bt8xx/bttv-driver.c
> index 227086a2e99c..b366a7e1d976 100644
> --- a/drivers/media/pci/bt8xx/bttv-driver.c
> +++ b/drivers/media/pci/bt8xx/bttv-driver.c
> @@ -3652,9 +3652,9 @@ bttv_irq_wakeup_vbi(struct bttv *btv, struct bttv_buffer *wakeup,
> wake_up(&wakeup->vb.done);
> }
>
> -static void bttv_irq_timeout(unsigned long data)
> +static void bttv_irq_timeout(struct timer_list *t)
> {
> - struct bttv *btv = (struct bttv *)data;
> + struct bttv *btv = from_timer(btv, t, timeout);
> struct bttv_buffer_set old,new;
> struct bttv_buffer *ovbi;
> struct bttv_buffer *item;
> @@ -4043,7 +4043,7 @@ static int bttv_probe(struct pci_dev *dev, const struct pci_device_id *pci_id)
> INIT_LIST_HEAD(&btv->capture);
> INIT_LIST_HEAD(&btv->vcapture);
>
> - setup_timer(&btv->timeout, bttv_irq_timeout, (unsigned long)btv);
> + timer_setup(&btv->timeout, bttv_irq_timeout, 0);
>
> btv->i2c_rc = -1;
> btv->tuner_type = UNSET;
> diff --git a/drivers/media/pci/bt8xx/bttv-input.c b/drivers/media/pci/bt8xx/bttv-input.c
> index 73d655d073d6..ac7674700685 100644
> --- a/drivers/media/pci/bt8xx/bttv-input.c
> +++ b/drivers/media/pci/bt8xx/bttv-input.c
> @@ -133,10 +133,10 @@ void bttv_input_irq(struct bttv *btv)
> ir_handle_key(btv);
> }
>
> -static void bttv_input_timer(unsigned long data)
> +static void bttv_input_timer(struct timer_list *t)
> {
> - struct bttv *btv = (struct bttv*)data;
> - struct bttv_ir *ir = btv->remote;
> + struct bttv_ir *ir = from_timer(ir, t, timer);
> + struct bttv *btv = ir->btv;
>
> if (btv->c.type == BTTV_BOARD_ENLTV_FM_2)
> ir_enltv_handle_key(btv);
> @@ -189,9 +189,9 @@ static u32 bttv_rc5_decode(unsigned int code)
> return rc5;
> }
>
> -static void bttv_rc5_timer_end(unsigned long data)
> +static void bttv_rc5_timer_end(struct timer_list *t)
> {
> - struct bttv_ir *ir = (struct bttv_ir *)data;
> + struct bttv_ir *ir = from_timer(ir, t, timer);
> ktime_t tv;
> u32 gap, rc5, scancode;
> u8 toggle, command, system;
> @@ -296,15 +296,15 @@ static int bttv_rc5_irq(struct bttv *btv)
>
> /* ---------------------------------------------------------------------- */
>
> -static void bttv_ir_start(struct bttv *btv, struct bttv_ir *ir)
> +static void bttv_ir_start(struct bttv_ir *ir)
> {
> if (ir->polling) {
> - setup_timer(&ir->timer, bttv_input_timer, (unsigned long)btv);
> + timer_setup(&ir->timer, bttv_input_timer, 0);
> ir->timer.expires = jiffies + msecs_to_jiffies(1000);
> add_timer(&ir->timer);
> } else if (ir->rc5_gpio) {
> /* set timer_end for code completion */
> - setup_timer(&ir->timer, bttv_rc5_timer_end, (unsigned long)ir);
> + timer_setup(&ir->timer, bttv_rc5_timer_end, 0);
> ir->shift_by = 1;
> ir->rc5_remote_gap = ir_rc5_remote_gap;
> }
> @@ -531,6 +531,7 @@ int bttv_input_init(struct bttv *btv)
>
> /* init input device */
> ir->dev = rc;
> + ir->btv = btv;
>
> snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
> btv->c.type);
> @@ -553,7 +554,7 @@ int bttv_input_init(struct bttv *btv)
> rc->driver_name = MODULE_NAME;
>
> btv->remote = ir;
> - bttv_ir_start(btv, ir);
> + bttv_ir_start(ir);
>
> /* all done */
> err = rc_register_device(rc);
> diff --git a/drivers/media/pci/bt8xx/bttvp.h b/drivers/media/pci/bt8xx/bttvp.h
> index 9efc4559fa8e..47f9b42b9879 100644
> --- a/drivers/media/pci/bt8xx/bttvp.h
> +++ b/drivers/media/pci/bt8xx/bttvp.h
> @@ -122,6 +122,7 @@ struct bttv_format {
>
> struct bttv_ir {
> struct rc_dev *dev;
> + struct bttv *btv;
> struct timer_list timer;
>
> char name[32];
> diff --git a/drivers/media/pci/cx18/cx18-fileops.c b/drivers/media/pci/cx18/cx18-fileops.c
> index 98467b2089fa..4f9c2395941b 100644
> --- a/drivers/media/pci/cx18/cx18-fileops.c
> +++ b/drivers/media/pci/cx18/cx18-fileops.c
> @@ -684,9 +684,9 @@ int cx18_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
> return -EINVAL;
> }
>
> -void cx18_vb_timeout(unsigned long data)
> +void cx18_vb_timeout(struct timer_list *t)
> {
> - struct cx18_stream *s = (struct cx18_stream *)data;
> + struct cx18_stream *s = from_timer(s, t, vb_timeout);
> struct cx18_videobuf_buffer *buf;
> unsigned long flags;
>
> diff --git a/drivers/media/pci/cx18/cx18-fileops.h b/drivers/media/pci/cx18/cx18-fileops.h
> index 58b00b433708..37ef34e866cb 100644
> --- a/drivers/media/pci/cx18/cx18-fileops.h
> +++ b/drivers/media/pci/cx18/cx18-fileops.h
> @@ -29,7 +29,7 @@ void cx18_stop_capture(struct cx18_open_id *id, int gop_end);
> void cx18_mute(struct cx18 *cx);
> void cx18_unmute(struct cx18 *cx);
> int cx18_v4l2_mmap(struct file *file, struct vm_area_struct *vma);
> -void cx18_vb_timeout(unsigned long data);
> +void cx18_vb_timeout(struct timer_list *t);
>
> /* Shared with cx18-alsa module */
> int cx18_claim_stream(struct cx18_open_id *id, int type);
> diff --git a/drivers/media/pci/cx18/cx18-streams.c b/drivers/media/pci/cx18/cx18-streams.c
> index 8385411af641..f35f78d66985 100644
> --- a/drivers/media/pci/cx18/cx18-streams.c
> +++ b/drivers/media/pci/cx18/cx18-streams.c
> @@ -282,7 +282,7 @@ static void cx18_stream_init(struct cx18 *cx, int type)
> INIT_WORK(&s->out_work_order, cx18_out_work_handler);
>
> INIT_LIST_HEAD(&s->vb_capture);
> - setup_timer(&s->vb_timeout, cx18_vb_timeout, (unsigned long)s);
> + timer_setup(&s->vb_timeout, cx18_vb_timeout, 0);
> spin_lock_init(&s->vb_lock);
> if (type == CX18_ENC_STREAM_TYPE_YUV) {
> spin_lock_init(&s->vbuf_q_lock);
> diff --git a/drivers/media/pci/ivtv/ivtv-driver.c b/drivers/media/pci/ivtv/ivtv-driver.c
> index 54dcac4b2229..6b2ffdc96961 100644
> --- a/drivers/media/pci/ivtv/ivtv-driver.c
> +++ b/drivers/media/pci/ivtv/ivtv-driver.c
> @@ -770,8 +770,7 @@ static int ivtv_init_struct1(struct ivtv *itv)
> init_waitqueue_head(&itv->event_waitq);
> init_waitqueue_head(&itv->vsync_waitq);
> init_waitqueue_head(&itv->dma_waitq);
> - setup_timer(&itv->dma_timer, ivtv_unfinished_dma,
> - (unsigned long)itv);
> + timer_setup(&itv->dma_timer, ivtv_unfinished_dma, 0);
>
> itv->cur_dma_stream = -1;
> itv->cur_pio_stream = -1;
> diff --git a/drivers/media/pci/ivtv/ivtv-irq.c b/drivers/media/pci/ivtv/ivtv-irq.c
> index 6efe1f71262c..63b09bf73bf0 100644
> --- a/drivers/media/pci/ivtv/ivtv-irq.c
> +++ b/drivers/media/pci/ivtv/ivtv-irq.c
> @@ -1074,9 +1074,9 @@ irqreturn_t ivtv_irq_handler(int irq, void *dev_id)
> return vsync_force ? IRQ_NONE : IRQ_HANDLED;
> }
>
> -void ivtv_unfinished_dma(unsigned long arg)
> +void ivtv_unfinished_dma(struct timer_list *t)
> {
> - struct ivtv *itv = (struct ivtv *)arg;
> + struct ivtv *itv = from_timer(itv, t, dma_timer);
>
> if (!test_bit(IVTV_F_I_DMA, &itv->i_flags))
> return;
> diff --git a/drivers/media/pci/ivtv/ivtv-irq.h b/drivers/media/pci/ivtv/ivtv-irq.h
> index 1e84433737cc..bcab5f07d37f 100644
> --- a/drivers/media/pci/ivtv/ivtv-irq.h
> +++ b/drivers/media/pci/ivtv/ivtv-irq.h
> @@ -48,6 +48,6 @@ irqreturn_t ivtv_irq_handler(int irq, void *dev_id);
>
> void ivtv_irq_work_handler(struct kthread_work *work);
> void ivtv_dma_stream_dec_prepare(struct ivtv_stream *s, u32 offset, int lock);
> -void ivtv_unfinished_dma(unsigned long arg);
> +void ivtv_unfinished_dma(struct timer_list *t);
>
> #endif
> diff --git a/drivers/media/pci/netup_unidvb/netup_unidvb_core.c b/drivers/media/pci/netup_unidvb/netup_unidvb_core.c
> index 60e6cd5b3a03..11829c0fa138 100644
> --- a/drivers/media/pci/netup_unidvb/netup_unidvb_core.c
> +++ b/drivers/media/pci/netup_unidvb/netup_unidvb_core.c
> @@ -638,9 +638,9 @@ static void netup_unidvb_queue_cleanup(struct netup_dma *dma)
> spin_unlock_irqrestore(&dma->lock, flags);
> }
>
> -static void netup_unidvb_dma_timeout(unsigned long data)
> +static void netup_unidvb_dma_timeout(struct timer_list *t)
> {
> - struct netup_dma *dma = (struct netup_dma *)data;
> + struct netup_dma *dma = from_timer(dma, t, timeout);
> struct netup_unidvb_dev *ndev = dma->ndev;
>
> dev_dbg(&ndev->pci_dev->dev, "%s()\n", __func__);
> @@ -664,8 +664,7 @@ static int netup_unidvb_dma_init(struct netup_unidvb_dev *ndev, int num)
> spin_lock_init(&dma->lock);
> INIT_WORK(&dma->work, netup_unidvb_dma_worker);
> INIT_LIST_HEAD(&dma->free_buffers);
> - setup_timer(&dma->timeout, netup_unidvb_dma_timeout,
> - (unsigned long)dma);
> + timer_setup(&dma->timeout, netup_unidvb_dma_timeout, 0);
> dma->ring_buffer_size = ndev->dma_size / 2;
> dma->addr_virt = ndev->dma_virt + dma->ring_buffer_size * num;
> dma->addr_phys = (dma_addr_t)((u64)ndev->dma_phys +
> diff --git a/drivers/media/pci/ttpci/av7110_ir.c b/drivers/media/pci/ttpci/av7110_ir.c
> index a883caa6488c..1e0684665eea 100644
> --- a/drivers/media/pci/ttpci/av7110_ir.c
> +++ b/drivers/media/pci/ttpci/av7110_ir.c
> @@ -84,9 +84,9 @@ static u16 default_key_map [256] = {
>
>
> /* key-up timer */
> -static void av7110_emit_keyup(unsigned long parm)
> +static void av7110_emit_keyup(struct timer_list *t)
> {
> - struct infrared *ir = (struct infrared *) parm;
> + struct infrared *ir = from_timer(ir, t, keyup_timer);
>
> if (!ir || !test_bit(ir->last_key, ir->input_dev->key))
> return;
> @@ -334,8 +334,7 @@ int av7110_ir_init(struct av7110 *av7110)
> av_list[av_cnt++] = av7110;
> av7110_check_ir_config(av7110, true);
>
> - setup_timer(&av7110->ir.keyup_timer, av7110_emit_keyup,
> - (unsigned long)&av7110->ir);
> + timer_setup(&av7110->ir.keyup_timer, av7110_emit_keyup, 0);
>
> input_dev = input_allocate_device();
> if (!input_dev)
> diff --git a/drivers/media/pci/tw686x/tw686x-core.c b/drivers/media/pci/tw686x/tw686x-core.c
> index 336e2f9bc1b6..c74c23cf8ced 100644
> --- a/drivers/media/pci/tw686x/tw686x-core.c
> +++ b/drivers/media/pci/tw686x/tw686x-core.c
> @@ -126,9 +126,9 @@ void tw686x_enable_channel(struct tw686x_dev *dev, unsigned int channel)
> * channels "too fast" which makes some TW686x devices very
> * angry and freeze the CPU (see note 1).
> */
> -static void tw686x_dma_delay(unsigned long data)
> +static void tw686x_dma_delay(struct timer_list *t)
> {
> - struct tw686x_dev *dev = (struct tw686x_dev *)data;
> + struct tw686x_dev *dev = from_timer(dev, t, dma_delay_timer);
> unsigned long flags;
>
> spin_lock_irqsave(&dev->lock, flags);
> @@ -325,8 +325,7 @@ static int tw686x_probe(struct pci_dev *pci_dev,
> goto iounmap;
> }
>
> - setup_timer(&dev->dma_delay_timer,
> - tw686x_dma_delay, (unsigned long) dev);
> + timer_setup(&dev->dma_delay_timer, tw686x_dma_delay, 0);
>
> /*
> * This must be set right before initializing v4l2_dev.
>
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