From dc49788d5f7e96a0bc8d65f304de36fd9de63647 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 26 Mar 2013 15:01:19 -0700 Subject: [PATCH] staging: comedi: rtd520: remove intClearMask from private data This variable in the private data is not necessary. Remove it. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/rtd520.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/drivers/staging/comedi/drivers/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c index a476a436eb7..5d7e385b380 100644 --- a/drivers/staging/comedi/drivers/rtd520.c +++ b/drivers/staging/comedi/drivers/rtd520.c @@ -414,7 +414,6 @@ struct rtdPrivate { /* shadow registers affect other registers, but can't be read back */ /* The macros below update these on writes */ - u16 intClearMask; /* interrupt clear mask */ u8 utcCtrl[4]; /* crtl mode for 3 utc + read back */ unsigned fifoLen; }; @@ -782,8 +781,7 @@ static irqreturn_t rtd_interrupt(int irq, /* interrupt number (ignored) */ goto abortTransfer; /* clear the interrupt */ - devpriv->intClearMask = status; - writew(devpriv->intClearMask, devpriv->las0 + LAS0_CLEAR); + writew(status, devpriv->las0 + LAS0_CLEAR); readw(devpriv->las0 + LAS0_CLEAR); return IRQ_HANDLED; @@ -810,8 +808,7 @@ transferDone: /* clear the interrupt */ status = readw(devpriv->las0 + LAS0_IT); - devpriv->intClearMask = status; - writew(devpriv->intClearMask, devpriv->las0 + LAS0_CLEAR); + writew(status, devpriv->las0 + LAS0_CLEAR); readw(devpriv->las0 + LAS0_CLEAR); fifoStatus = readl(devpriv->las0 + LAS0_ADC); @@ -1122,8 +1119,7 @@ static int rtd_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) /* This doesn't seem to work. There is no way to clear an interrupt that the priority controller has queued! */ - devpriv->intClearMask = ~0; - writew(devpriv->intClearMask, devpriv->las0 + LAS0_CLEAR); + writew(~0, devpriv->las0 + LAS0_CLEAR); readw(devpriv->las0 + LAS0_CLEAR); /* TODO: allow multiple interrupt sources */ @@ -1308,8 +1304,7 @@ static void rtd_reset(struct comedi_device *dev) udelay(100); /* needed? */ writel(0, devpriv->lcfg + PLX_INTRCS_REG); writew(0, devpriv->las0 + LAS0_IT); - devpriv->intClearMask = ~0; - writew(devpriv->intClearMask, devpriv->las0 + LAS0_CLEAR); + writew(~0, devpriv->las0 + LAS0_CLEAR); readw(devpriv->las0 + LAS0_CLEAR); } -- 2.46.0