diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/amplc_dio200.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/amplc_dio200.c | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/drivers/staging/comedi/drivers/amplc_dio200.c b/drivers/staging/comedi/drivers/amplc_dio200.c index 8eb67651486a..bf27617aa62d 100644 --- a/drivers/staging/comedi/drivers/amplc_dio200.c +++ b/drivers/staging/comedi/drivers/amplc_dio200.c @@ -460,6 +460,7 @@ struct dio200_subdev_8254 { int has_clk_gat_sce; unsigned clock_src[3]; /* Current clock sources */ unsigned gate_src[3]; /* Current gate sources */ + spinlock_t spinlock; }; struct dio200_subdev_intr { @@ -1042,8 +1043,11 @@ dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s, { struct dio200_subdev_8254 *subpriv = s->private; int chan = CR_CHAN(insn->chanspec); + unsigned long flags; + spin_lock_irqsave(&subpriv->spinlock, flags); data[0] = i8254_read(subpriv->iobase, 0, chan); + spin_unlock_irqrestore(&subpriv->spinlock, flags); return 1; } @@ -1057,8 +1061,11 @@ dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s, { struct dio200_subdev_8254 *subpriv = s->private; int chan = CR_CHAN(insn->chanspec); + unsigned long flags; + spin_lock_irqsave(&subpriv->spinlock, flags); i8254_write(subpriv->iobase, 0, chan, data[0]); + spin_unlock_irqrestore(&subpriv->spinlock, flags); return 1; } @@ -1151,14 +1158,16 @@ dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct dio200_subdev_8254 *subpriv = s->private; - int ret; + int ret = 0; int chan = CR_CHAN(insn->chanspec); + unsigned long flags; + spin_lock_irqsave(&subpriv->spinlock, flags); switch (data[0]) { case INSN_CONFIG_SET_COUNTER_MODE: ret = i8254_set_mode(subpriv->iobase, 0, chan, data[1]); if (ret < 0) - return -EINVAL; + ret = -EINVAL; break; case INSN_CONFIG_8254_READ_STATUS: data[1] = i8254_status(subpriv->iobase, 0, chan); @@ -1166,30 +1175,35 @@ dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s, case INSN_CONFIG_SET_GATE_SRC: ret = dio200_set_gate_src(subpriv, chan, data[2]); if (ret < 0) - return -EINVAL; + ret = -EINVAL; break; case INSN_CONFIG_GET_GATE_SRC: ret = dio200_get_gate_src(subpriv, chan); - if (ret < 0) - return -EINVAL; + if (ret < 0) { + ret = -EINVAL; + break; + } data[2] = ret; break; case INSN_CONFIG_SET_CLOCK_SRC: ret = dio200_set_clock_src(subpriv, chan, data[1]); if (ret < 0) - return -EINVAL; + ret = -EINVAL; break; case INSN_CONFIG_GET_CLOCK_SRC: ret = dio200_get_clock_src(subpriv, chan, &data[2]); - if (ret < 0) - return -EINVAL; + if (ret < 0) { + ret = -EINVAL; + break; + } data[1] = ret; break; default: - return -EINVAL; + ret = -EINVAL; break; } - return insn->n; + spin_unlock_irqrestore(&subpriv->spinlock, flags); + return ret < 0 ? ret : insn->n; } /* @@ -1222,6 +1236,7 @@ dio200_subdev_8254_init(struct comedi_device *dev, struct comedi_subdevice *s, s->insn_write = dio200_subdev_8254_write; s->insn_config = dio200_subdev_8254_config; + spin_lock_init(&subpriv->spinlock); subpriv->iobase = offset + iobase; subpriv->has_clk_gat_sce = has_clk_gat_sce; if (has_clk_gat_sce) { |