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init dma masks in pnp_dev

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PNP now initializes device dma masks, which prevents oopses when generic
dma calls are made using pnp device nodes.

This assumes PNP only uses ISA DMA, with 24 bit addresses; and that it's
safe to init those masks for all devices (rather than finding out which
devices have been assigned DMA channels, and handling only those).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Adam Belay <abelay@novell.com>
Cc: Jaroslav Kysela <perex@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Brownell 2007-05-08 00:25:29 -07:00 committed by Linus Torvalds
parent 6f8bc500a1
commit 2e17c5508f
2 changed files with 4 additions and 0 deletions
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3
drivers/pnp/core.c
View file

@ -14,6 +14,7 @@
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/dma-mapping.h>
#include "base.h"
@ -114,6 +115,8 @@ int __pnp_add_device(struct pnp_dev *dev)
int ret;
pnp_fixup_device(dev);
dev->dev.bus = &pnp_bus_type;
dev->dev.dma_mask = &dev->dma_mask;
dev->dma_mask = dev->dev.coherent_dma_mask = DMA_24BIT_MASK;
dev->dev.release = &pnp_release_device;
dev->status = PNP_READY;
spin_lock(&pnp_lock);

1
include/linux/pnp.h
View file

@ -177,6 +177,7 @@ static inline void pnp_set_card_drvdata (struct pnp_card_link *pcard, void *data
struct pnp_dev {
struct device dev; /* Driver Model device interface */
u64 dma_mask;
unsigned char number; /* used as an index, must be unique */
int status;