[PATCH 1/6] staging: comedi: ni_labpc_common: move comedi_alloc_devpriv() to common code

[H Hartley Sweeten]

The ni_labpc_common module is used by the ni_labpc, ni_labpc_pci, and 
ni_labpc_cs
drivers to provide the common code support. Those drivers currently all call
comedi_alloc_devpriv() to allocate the private data before calling the common
attach function.

For aesthetics, move the private data allocation into the common code.

Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/staging/comedi/drivers/ni_labpc.c        | 5 -----
 drivers/staging/comedi/drivers/ni_labpc_common.c | 6 +++++-
 drivers/staging/comedi/drivers/ni_labpc_cs.c     | 5 -----
 drivers/staging/comedi/drivers/ni_labpc_pci.c    | 5 -----
 4 files changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/comedi/drivers/ni_labpc.c 
b/drivers/staging/comedi/drivers/ni_labpc.c
index 59da404..e7b25e8 100644
--- a/drivers/staging/comedi/drivers/ni_labpc.c
+++ b/drivers/staging/comedi/drivers/ni_labpc.c
@@ -84,15 +84,10 @@ static const struct labpc_boardinfo labpc_boards[] = {
 
 static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 {
-       struct labpc_private *devpriv;
        unsigned int irq = it->options[1];
        unsigned int dma_chan = it->options[2];
        int ret;
 
-       devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
-       if (!devpriv)
-               return -ENOMEM;
-
        ret = comedi_request_region(dev, it->options[0], 0x20);
        if (ret)
                return ret;
diff --git a/drivers/staging/comedi/drivers/ni_labpc_common.c 
b/drivers/staging/comedi/drivers/ni_labpc_common.c
index 8fb5c1f..3cd200a 100644
--- a/drivers/staging/comedi/drivers/ni_labpc_common.c
+++ b/drivers/staging/comedi/drivers/ni_labpc_common.c
@@ -1215,11 +1215,15 @@ int labpc_common_attach(struct comedi_device *dev,
                        unsigned int irq, unsigned long isr_flags)
 {
        const struct labpc_boardinfo *board = dev->board_ptr;
-       struct labpc_private *devpriv = dev->private;
+       struct labpc_private *devpriv;
        struct comedi_subdevice *s;
        int ret;
        int i;
 
+       devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+       if (!devpriv)
+               return -ENOMEM;
+
        if (dev->mmio) {
                devpriv->read_byte = labpc_readb;
                devpriv->write_byte = labpc_writeb;
diff --git a/drivers/staging/comedi/drivers/ni_labpc_cs.c 
b/drivers/staging/comedi/drivers/ni_labpc_cs.c
index 0a8b322..d58f1f9 100644
--- a/drivers/staging/comedi/drivers/ni_labpc_cs.c
+++ b/drivers/staging/comedi/drivers/ni_labpc_cs.c
@@ -80,7 +80,6 @@ static int labpc_auto_attach(struct comedi_device *dev,
                             unsigned long context)
 {
        struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
-       struct labpc_private *devpriv;
        int ret;
 
        /* The ni_labpc driver needs the board_ptr */
@@ -96,10 +95,6 @@ static int labpc_auto_attach(struct comedi_device *dev,
        if (!link->irq)
                return -EINVAL;
 
-       devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
-       if (!devpriv)
-               return -ENOMEM;
-
        return labpc_common_attach(dev, link->irq, IRQF_SHARED);
 }
 
diff --git a/drivers/staging/comedi/drivers/ni_labpc_pci.c 
b/drivers/staging/comedi/drivers/ni_labpc_pci.c
index a9f408a..0407ff6 100644
--- a/drivers/staging/comedi/drivers/ni_labpc_pci.c
+++ b/drivers/staging/comedi/drivers/ni_labpc_pci.c
@@ -79,7 +79,6 @@ static int labpc_pci_auto_attach(struct comedi_device *dev,
 {
        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
        const struct labpc_boardinfo *board = NULL;
-       struct labpc_private *devpriv;
        int ret;
 
        if (context < ARRAY_SIZE(labpc_pci_boards))
@@ -101,10 +100,6 @@ static int labpc_pci_auto_attach(struct comedi_device *dev,
        if (!dev->mmio)
                return -ENOMEM;
 
-       devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
-       if (!devpriv)
-               return -ENOMEM;
-
        return labpc_common_attach(dev, pcidev->irq, IRQF_SHARED);
 }
 
-- 
2.0.3

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