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staging: comedi: cb_das16_cs: probe for the device first 

During the attach of the comedi_driver, the device type probe
can fail. We should do the probe before requesting the irq
for the driver.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2012-06-25 17:11:56 -07:00 committed by Greg Kroah-Hartman
parent 8c50aa1532
commit 9a4d211547
1 changed files with 7 additions and 9 deletions
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16
drivers/staging/comedi/drivers/cb_das16_cs.c
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@ -454,6 +454,13 @@ static int das16cs_attach(struct comedi_device *dev,
if (!link)
return -EIO;
dev->board_ptr = das16cs_probe(dev, link);
if (!dev->board_ptr)
return -EIO;
thisboard = comedi_board(dev);
dev->board_name = thisboard->name;
dev->iobase = link->resource[0]->start;
dev_dbg(dev->class_dev, "I/O base=0x%04lx\n", dev->iobase);
@ -461,23 +468,14 @@ static int das16cs_attach(struct comedi_device *dev,
for (i = 0; i < 48; i += 2)
dev_dbg(dev->class_dev, "%04x\n", inw(dev->iobase + i));
ret = request_irq(link->irq, das16cs_interrupt,
IRQF_SHARED, "cb_das16_cs", dev);
if (ret < 0)
return ret;
dev->irq = link->irq;
dev_dbg(dev->class_dev, "irq=%u\n", dev->irq);
dev->board_ptr = das16cs_probe(dev, link);
if (!dev->board_ptr)
return -EIO;
thisboard = comedi_board(dev);
dev->board_name = thisboard->name;
if (alloc_private(dev, sizeof(struct das16cs_private)) < 0)
return -ENOMEM;