linux-kernel - [PATCH 12/12] staging: comedi: amplc_pc236: set board

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Date:	Fri, 25 Jul 2014 10:04:58 +0100
From:	Ian Abbott <abbotti@....co.uk>
To:	driverdev-devel@...uxdriverproject.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ian Abbott <abbotti@....co.uk>,
	H Hartley Sweeten <hartleys@...ionengravers.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 12/12] staging: comedi: amplc_pc236: set board_name before common attach

For PCI boards, the `auto_attach` handler, `pc236_auto_attach()`,
initializes `dev->board_ptr` to point to a `struct pc236_board`, but
leaves `dev->board_name` unchanged.  The Comedi core will have
initialized `dev->board_name` to the `driver_name` string member of
`amplc_pc236_driver`.  For consistency with ISA boards manually
configured by the `COMEDI_DEVCONFIG` ioctl via the legacy `attach`
handler, `pc236_attach()`, set `dev->board_name` to the `name` member of
the `struct pc236_board` pointed to by `dev->board_ptr`.

Both `pc236_attach()` and `pc236_auto_attach()` call
`pc236_common_attach()`, which also sets `dev->board_name` to the `name`
member of the `struct pc236_board`.  Since this assignment no longer
changes anything, remove it.

A nice side-effect of this change is that the same owner name string is
used for requesting I/O regions (before the call the
`pc236_common_attach()`) as is used for requesting the IRQ handler
(during the call to `pc236_common_attach()`).  It was already the same
for (manually configured) ISA boards, but is now the same for
(automatically configured) PCI boards.

Signed-off-by: Ian Abbott <abbotti@....co.uk>
---
 drivers/staging/comedi/drivers/amplc_pc236.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/comedi/drivers/amplc_pc236.c b/drivers/staging/comedi/drivers/amplc_pc236.c
index 1a7fa45..b92fc6f 100644
--- a/drivers/staging/comedi/drivers/amplc_pc236.c
+++ b/drivers/staging/comedi/drivers/amplc_pc236.c
@@ -284,11 +284,9 @@ static irqreturn_t pc236_interrupt(int irq, void *d)
 static int pc236_common_attach(struct comedi_device *dev, unsigned long iobase,
 			       unsigned int irq, unsigned long req_irq_flags)
 {
-	const struct pc236_board *thisboard = comedi_board(dev);
 	struct comedi_subdevice *s;
 	int ret;

-	dev->board_name = thisboard->name;
 	dev->iobase = iobase;

 	ret = comedi_alloc_subdevices(dev, 2);
@@ -362,6 +360,7 @@ static int pc236_auto_attach(struct comedi_device *dev,
 		return -ENOMEM;

 	dev->board_ptr = &pc236_pci_board;
+	dev->board_name = pc236_pci_board.name;
 	ret = comedi_pci_enable(dev);
 	if (ret)
 		return ret;
-- 
2.0.0

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