lkml.org 
[lkml]   [2007]   [Feb]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[patch 2.6.21-rc2] init dma masks in pnp_dev
Date
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>

Index: g26/include/linux/pnp.h
===================================================================
--- g26.orig/include/linux/pnp.h 2007-02-12 00:31:26.000000000 -0800
+++ g26/include/linux/pnp.h 2007-02-18 20:18:55.000000000 -0800
@@ -177,6 +177,7 @@ static inline void pnp_set_card_drvdata

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;

Index: g26/drivers/pnp/core.c
===================================================================
--- g26.orig/drivers/pnp/core.c 2005-11-12 22:24:18.000000000 -0800
+++ g26/drivers/pnp/core.c 2007-02-18 20:42:17.000000000 -0800
@@ -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);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2007-03-01 00:17    [W:0.025 / U:1.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site