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Date: Wed, 18 Jul 2012 18:34:15 -0700
From: H Hartley Sweeten <hartleys@...ionengravers.com>
To: Linux Kernel <linux-kernel@...r.kernel.org>
CC: <devel@...verdev.osuosl.org>, <abbotti@....co.uk>,
<gregkh@...uxfoundation.org>
Subject: [PATCH 22/90] staging: comedi: adv_pci_dio: remove CheckAndAllocCard()
This driver creates a linked list of all the pci devices in
the system while it's looking for a match. It's only use is
to determine if a device is "free" to use. The pci_is_enabled()
helper can give us the same information. Use that instead and
remove the linked list.
Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ian Abbott <abbotti@....co.uk>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/staging/comedi/drivers/adv_pci_dio.c | 39 +---------------------------
1 file changed, 1 insertion(+), 38 deletions(-)
diff --git a/drivers/staging/comedi/drivers/adv_pci_dio.c b/drivers/staging/comedi/drivers/adv_pci_dio.c
index e1f52c6..ab92169 100644
--- a/drivers/staging/comedi/drivers/adv_pci_dio.c
+++ b/drivers/staging/comedi/drivers/adv_pci_dio.c
@@ -382,8 +382,6 @@ static const struct dio_boardtype boardtypes[] = {
};
struct pci_dio_private {
- struct pci_dio_private *prev; /* previous private struct */
- struct pci_dio_private *next; /* next private struct */
struct pci_dev *pcidev; /* pointer to board's pci_dev */
char valid; /* card is usable */
char GlobalIrqEnabled; /* 1= any IRQ source is enabled */
@@ -404,8 +402,6 @@ struct pci_dio_private {
unsigned short IDIFiltrHigh[8]; /* IDI's filter value high signal */
};
-static struct pci_dio_private *pci_priv; /* list of allocated cards */
-
#define devpriv ((struct pci_dio_private *)dev->private)
#define this_board ((const struct dio_boardtype *)dev->board_ptr)
@@ -1055,38 +1051,12 @@ static int pci_dio_add_8254(struct comedi_device *dev,
return 0;
}
-/*
-==============================================================================
-*/
-static int CheckAndAllocCard(struct comedi_device *dev,
- struct comedi_devconfig *it,
- struct pci_dev *pcidev)
-{
- struct pci_dio_private *pr, *prev;
-
- for (pr = pci_priv, prev = NULL; pr != NULL; prev = pr, pr = pr->next) {
- if (pr->pcidev == pcidev)
- return 0; /* this card is used, look for another */
-
- }
-
- if (prev) {
- devpriv->prev = prev;
- prev->next = devpriv;
- } else {
- pci_priv = devpriv;
- }
-
- return 1;
-}
-
static struct pci_dev *pci_dio_find_pci_dev(struct comedi_device *dev,
struct comedi_devconfig *it)
{
struct pci_dev *pcidev = NULL;
unsigned long iobase;
int i;
- int ret;
for_each_pci_dev(pcidev) {
/* loop through cards supported by this driver */
@@ -1103,8 +1073,7 @@ static struct pci_dev *pci_dio_find_pci_dev(struct comedi_device *dev,
continue;
}
}
- ret = CheckAndAllocCard(dev, it, pcidev);
- if (ret != 1)
+ if (pci_is_enabled(pcidev))
continue;
dev->board_ptr = boardtypes + i;
break;
@@ -1260,12 +1229,6 @@ static void pci_dio_detach(struct comedi_device *dev)
comedi_pci_disable(devpriv->pcidev);
pci_dev_put(devpriv->pcidev);
}
- if (devpriv->prev)
- devpriv->prev->next = devpriv->next;
- else
- pci_priv = devpriv->next;
- if (devpriv->next)
- devpriv->next->prev = devpriv->prev;
}
}
--
1.7.11
--
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