diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2015-08-05 10:45:15 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-07 15:03:30 -0700 |
| commit | 8f3f3eb7a264630a73c23cecfa2af2235775e09a (patch) | |
| tree | 93e317de8e5043fb63bca2dbeb07d5e2f519002e /drivers/staging/comedi/drivers/me4000.c | |
| parent | b047d9ccc3a40b672594b4eab1eac91d7efebcd9 (diff) | |
staging: comedi: me4000: only enable PLX interrupt if we have and irq
Currently me4000_reset() always enables the PLX interrupt. Move the
enable of the interrupt into me4000_auto_attach() and only do the
enable if we actually have and irq.
Make sure the PLX interrupt is disabled in me4000_reset() before we
try to request the irq.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi/drivers/me4000.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/me4000.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c index da0075b926a5..a4c28fa90759 100644 --- a/drivers/staging/comedi/drivers/me4000.c +++ b/drivers/staging/comedi/drivers/me4000.c @@ -412,7 +412,10 @@ static void me4000_reset(struct comedi_device *dev) unsigned int val; int chan; - /* Make a hardware reset */ + /* Disable interrupts on the PLX */ + outl(0, devpriv->plx_regbase + PLX9052_INTCSR); + + /* Software reset the PLX */ val = inl(devpriv->plx_regbase + PLX9052_CNTRL); val |= PLX9052_CNTRL_PCI_RESET; outl(val, devpriv->plx_regbase + PLX9052_CNTRL); @@ -430,11 +433,6 @@ static void me4000_reset(struct comedi_device *dev) for (chan = 0; chan < 4; chan++) outl(val, dev->iobase + ME4000_AO_CTRL_REG(chan)); - /* Enable interrupts on the PLX */ - outl(PLX9052_INTCSR_LI1ENAB | - PLX9052_INTCSR_LI1POL | - PLX9052_INTCSR_PCIENAB, devpriv->plx_regbase + PLX9052_INTCSR); - /* Set the adustment register for AO demux */ outl(ME4000_AO_DEMUX_ADJUST_VALUE, dev->iobase + ME4000_AO_DEMUX_ADJUST_REG); @@ -1181,8 +1179,14 @@ static int me4000_auto_attach(struct comedi_device *dev, if (pcidev->irq > 0) { result = request_irq(pcidev->irq, me4000_ai_isr, IRQF_SHARED, dev->board_name, dev); - if (result == 0) + if (result == 0) { dev->irq = pcidev->irq; + + /* Enable interrupts on the PLX */ + outl(PLX9052_INTCSR_LI1ENAB | PLX9052_INTCSR_LI1POL | + PLX9052_INTCSR_PCIENAB, + devpriv->plx_regbase + PLX9052_INTCSR); + } } result = comedi_alloc_subdevices(dev, 4); |