From: Kees Cook Date: Mon, 16 Oct 2017 23:25:03 +0000 (-0700) Subject: staging/comedi: Convert timers to use timer_setup() X-Git-Tag: v5.15~10046^2~132 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e44d4907f8b0f54d3aa0d057302f95df804aa171;p=platform%2Fkernel%2Flinux-starfive.git staging/comedi: Convert timers to use timer_setup() 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. Adds pointer back to comedi device from private struct. Cc: H Hartley Sweeten Cc: devel@driverdev.osuosl.org Signed-off-by: Kees Cook Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/comedi_test.c b/drivers/staging/comedi/drivers/comedi_test.c index ccfd642..c7e8194 100644 --- a/drivers/staging/comedi/drivers/comedi_test.c +++ b/drivers/staging/comedi/drivers/comedi_test.c @@ -93,6 +93,7 @@ struct waveform_private { unsigned int ai_scan_period; /* AI scan period in usec */ unsigned int ai_convert_period; /* AI conversion period in usec */ struct timer_list ao_timer; /* timer for AO commands */ + struct comedi_device *dev; /* parent comedi device */ u64 ao_last_scan_time; /* time of previous AO scan in usec */ unsigned int ao_scan_period; /* AO scan period in usec */ unsigned short ao_loopbacks[N_CHANS]; @@ -201,10 +202,10 @@ static unsigned short fake_waveform(struct comedi_device *dev, * It should run in the background; therefore it is scheduled by * a timer mechanism. */ -static void waveform_ai_timer(unsigned long arg) +static void waveform_ai_timer(struct timer_list *t) { - struct comedi_device *dev = (struct comedi_device *)arg; - struct waveform_private *devpriv = dev->private; + struct waveform_private *devpriv = from_timer(devpriv, t, ai_timer); + struct comedi_device *dev = devpriv->dev; struct comedi_subdevice *s = dev->read_subdev; struct comedi_async *async = s->async; struct comedi_cmd *cmd = &async->cmd; @@ -438,10 +439,10 @@ static int waveform_ai_insn_read(struct comedi_device *dev, * This is the background routine to handle AO commands, scheduled by * a timer mechanism. */ -static void waveform_ao_timer(unsigned long arg) +static void waveform_ao_timer(struct timer_list *t) { - struct comedi_device *dev = (struct comedi_device *)arg; - struct waveform_private *devpriv = dev->private; + struct waveform_private *devpriv = from_timer(devpriv, t, ao_timer); + struct comedi_device *dev = devpriv->dev; struct comedi_subdevice *s = dev->write_subdev; struct comedi_async *async = s->async; struct comedi_cmd *cmd = &async->cmd; @@ -686,8 +687,9 @@ static int waveform_common_attach(struct comedi_device *dev, for (i = 0; i < s->n_chan; i++) devpriv->ao_loopbacks[i] = s->maxdata / 2; - setup_timer(&devpriv->ai_timer, waveform_ai_timer, (unsigned long)dev); - setup_timer(&devpriv->ao_timer, waveform_ao_timer, (unsigned long)dev); + devpriv->dev = dev; + timer_setup(&devpriv->ai_timer, waveform_ai_timer, 0); + timer_setup(&devpriv->ao_timer, waveform_ao_timer, 0); dev_info(dev->class_dev, "%s: %u microvolt, %u microsecond waveform attached\n", diff --git a/drivers/staging/comedi/drivers/das16.c b/drivers/staging/comedi/drivers/das16.c index 2b2a446..ddd4aea 100644 --- a/drivers/staging/comedi/drivers/das16.c +++ b/drivers/staging/comedi/drivers/das16.c @@ -440,6 +440,7 @@ static inline int timer_period(void) struct das16_private_struct { struct comedi_isadma *dma; + struct comedi_device *dev; unsigned int clockbase; unsigned int ctrl_reg; unsigned int divisor1; @@ -525,10 +526,10 @@ static void das16_interrupt(struct comedi_device *dev) comedi_handle_events(dev, s); } -static void das16_timer_interrupt(unsigned long arg) +static void das16_timer_interrupt(struct timer_list *t) { - struct comedi_device *dev = (struct comedi_device *)arg; - struct das16_private_struct *devpriv = dev->private; + struct das16_private_struct *devpriv = from_timer(devpriv, t, timer); + struct comedi_device *dev = devpriv->dev; unsigned long flags; das16_interrupt(dev); @@ -934,8 +935,7 @@ static void das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan) { struct das16_private_struct *devpriv = dev->private; - setup_timer(&devpriv->timer, das16_timer_interrupt, - (unsigned long)dev); + timer_setup(&devpriv->timer, das16_timer_interrupt, 0); /* only DMA channels 3 and 1 are valid */ if (!(dma_chan == 1 || dma_chan == 3)) @@ -1044,6 +1044,7 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it) devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); if (!devpriv) return -ENOMEM; + devpriv->dev = dev; if (board->size < 0x400) { ret = comedi_request_region(dev, it->options[0], board->size); diff --git a/drivers/staging/comedi/drivers/jr3_pci.c b/drivers/staging/comedi/drivers/jr3_pci.c index f1c2a20..cbff3b4 100644 --- a/drivers/staging/comedi/drivers/jr3_pci.c +++ b/drivers/staging/comedi/drivers/jr3_pci.c @@ -96,6 +96,7 @@ struct jr3_pci_poll_delay { struct jr3_pci_dev_private { struct timer_list timer; + struct comedi_device *dev; }; union jr3_pci_single_range { @@ -585,10 +586,10 @@ jr3_pci_poll_subdevice(struct comedi_subdevice *s) return result; } -static void jr3_pci_poll_dev(unsigned long data) +static void jr3_pci_poll_dev(struct timer_list *t) { - struct comedi_device *dev = (struct comedi_device *)data; - struct jr3_pci_dev_private *devpriv = dev->private; + struct jr3_pci_dev_private *devpriv = from_timer(devpriv, t, timer); + struct comedi_device *dev = devpriv->dev; struct jr3_pci_subdev_private *spriv; struct comedi_subdevice *s; unsigned long flags; @@ -770,7 +771,8 @@ static int jr3_pci_auto_attach(struct comedi_device *dev, spriv->next_time_min = jiffies + msecs_to_jiffies(500); } - setup_timer(&devpriv->timer, jr3_pci_poll_dev, (unsigned long)dev); + devpriv->dev = dev; + timer_setup(&devpriv->timer, jr3_pci_poll_dev, 0); devpriv->timer.expires = jiffies + msecs_to_jiffies(1000); add_timer(&devpriv->timer);