From 664e244ca5d90c5f3d97a67202cbdf821a3feeb0 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 9 Sep 2014 13:05:41 -0700 Subject: [PATCH] staging: comedi: adl_pci9118: exttrg source is always EXTTRG_AI The 'source' passed to pci9118_exttrg_{add,del}() is always EXTTRG_AI. Remove the parameter and unnecessary sanity checking. Also, since there is only one vaild exttrg source, remove the unnecessary 'exttrg_users' member from the private data. The pci9118_exttrg_{add,del}() functions always succeed. For aesthetics change the return type to void. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/adl_pci9118.c | 38 ++++++-------------- 1 file changed, 11 insertions(+), 27 deletions(-) diff --git a/drivers/staging/comedi/drivers/adl_pci9118.c b/drivers/staging/comedi/drivers/adl_pci9118.c index 7781d8786372..69b879879ddd 100644 --- a/drivers/staging/comedi/drivers/adl_pci9118.c +++ b/drivers/staging/comedi/drivers/adl_pci9118.c @@ -143,8 +143,6 @@ #define START_AI_INT 0x04 /* start measure on internal trigger */ #define STOP_AI_INT 0x08 /* stop measure on internal trigger */ -#define EXTTRG_AI 0 /* ext trg is used by AI */ - #define PCI9118_HALF_FIFO_SZ (1024 / 2) static const struct comedi_lrange pci9118_ai_range = { @@ -248,10 +246,6 @@ struct pci9118_private { */ unsigned int dma_actbuf; /* which buffer is used now */ struct pci9118_dmabuf dmabuf[2]; - unsigned char exttrg_users; /* - * bit field of external trigger - * users(0-AI, 1-AO, 2-DI, 3-DO) - */ int softsshdelay; /* * >0 use software S&H, * numer is requested delay in ns @@ -512,33 +506,23 @@ static int move_block_from_dma(struct comedi_device *dev, return 0; } -static int pci9118_exttrg_add(struct comedi_device *dev, unsigned char source) +static void pci9118_exttrg_add(struct comedi_device *dev) { struct pci9118_private *devpriv = dev->private; - if (source > 3) - return -1; /* incorrect source */ - devpriv->exttrg_users |= (1 << source); devpriv->int_ctrl |= PCI9118_INT_CTRL_DTRG; outl(devpriv->int_ctrl, dev->iobase + PCI9118_INT_CTRL_REG); pci9118_amcc_int_ena(dev, true); - return 0; } -static int pci9118_exttrg_del(struct comedi_device *dev, unsigned char source) +static void pci9118_exttrg_del(struct comedi_device *dev) { struct pci9118_private *devpriv = dev->private; - if (source > 3) - return -1; /* incorrect source */ - devpriv->exttrg_users &= ~(1 << source); - if (!devpriv->exttrg_users) { /* shutdown ext trg intterrupts */ - devpriv->int_ctrl &= ~PCI9118_INT_CTRL_DTRG; - if (!devpriv->int_ctrl) - pci9118_amcc_int_ena(dev, false); - outl(devpriv->int_ctrl, dev->iobase + PCI9118_INT_CTRL_REG); - } - return 0; + devpriv->int_ctrl &= ~PCI9118_INT_CTRL_DTRG; + if (!devpriv->int_ctrl) + pci9118_amcc_int_ena(dev, false); + outl(devpriv->int_ctrl, dev->iobase + PCI9118_INT_CTRL_REG); } static void pci9118_calc_divisors(char mode, struct comedi_device *dev, @@ -608,7 +592,7 @@ static int pci9118_ai_cancel(struct comedi_device *dev, if (devpriv->usedma) pci9118_amcc_dma_ena(dev, false); - pci9118_exttrg_del(dev, EXTTRG_AI); + pci9118_exttrg_del(dev); pci9118_start_pacer(dev, 0); /* stop 8254 counters */ /* set default config (disable burst and triggers) */ devpriv->ai_cfg = PCI9118_AI_CFG_PDTRG | PCI9118_AI_CFG_PETRG; @@ -794,7 +778,7 @@ static irqreturn_t pci9118_interrupt(int irq, void *d) /* deactivate EXT trigger */ devpriv->ai12_startstop &= ~START_AI_EXT; if (!(devpriv->ai12_startstop & STOP_AI_EXT)) - pci9118_exttrg_del(dev, EXTTRG_AI); + pci9118_exttrg_del(dev); /* start pacer */ pci9118_start_pacer(dev, devpriv->ai_do); @@ -803,7 +787,7 @@ static irqreturn_t pci9118_interrupt(int irq, void *d) } else if (devpriv->ai12_startstop & STOP_AI_EXT) { /* deactivate EXT trigger */ devpriv->ai12_startstop &= ~STOP_AI_EXT; - pci9118_exttrg_del(dev, EXTTRG_AI); + pci9118_exttrg_del(dev); /* on next interrupt measure will stop */ devpriv->ai_neverending = 0; @@ -1154,7 +1138,7 @@ static int pci9118_ai_docmd_sampl(struct comedi_device *dev, } if (devpriv->ai12_startstop) - pci9118_exttrg_add(dev, EXTTRG_AI); + pci9118_exttrg_add(dev); /* activate EXT trigger */ if ((devpriv->ai_do == 1) || (devpriv->ai_do == 2)) @@ -1226,7 +1210,7 @@ static int pci9118_ai_docmd_dma(struct comedi_device *dev, } if (devpriv->ai12_startstop) { - pci9118_exttrg_add(dev, EXTTRG_AI); + pci9118_exttrg_add(dev); /* activate EXT trigger */ } -- 2.30.2