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authorPaul Mundt <lethal@linux-sh.org>2006-11-24 08:43:09 +0300
committerPaul Mundt <lethal@linux-sh.org>2006-12-06 04:45:39 +0300
commit4dfc119f1c0723c54a20ff5ca4ea460ce7a4edb5 (patch)
treeda62d31bd39155aa111a2655f35e14b18d807bde /arch/sh
parente0969e0c9b609fdfe217e34f3e046179ffe88eb6 (diff)
downloadlinux-4dfc119f1c0723c54a20ff5ca4ea460ce7a4edb5.tar.xz
sh: dma-sysfs fixes.
Handle the case where no registered DMACs exist somewhat more gracefully. While we're at it, check for sysdev_create_file() failing. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/drivers/dma/dma-sysfs.c23
1 files changed, 15 insertions, 8 deletions
diff --git a/arch/sh/drivers/dma/dma-sysfs.c b/arch/sh/drivers/dma/dma-sysfs.c
index 29b8ef9873d1..eebcd4768bbf 100644
--- a/arch/sh/drivers/dma/dma-sysfs.c
+++ b/arch/sh/drivers/dma/dma-sysfs.c
@@ -3,7 +3,7 @@
*
* sysfs interface for SH DMA API
*
- * Copyright (C) 2004, 2005 Paul Mundt
+ * Copyright (C) 2004 - 2006 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
@@ -21,7 +21,6 @@
static struct sysdev_class dma_sysclass = {
set_kset_name("dma"),
};
-
EXPORT_SYMBOL(dma_sysclass);
static ssize_t dma_show_devices(struct sys_device *dev, char *buf)
@@ -31,7 +30,10 @@ static ssize_t dma_show_devices(struct sys_device *dev, char *buf)
for (i = 0; i < MAX_DMA_CHANNELS; i++) {
struct dma_info *info = get_dma_info(i);
- struct dma_channel *channel = &info->channels[i];
+ struct dma_channel *channel = get_dma_channel(i);
+
+ if (unlikely(!info) || !channel)
+ continue;
len += sprintf(buf + len, "%2d: %14s %s\n",
channel->chan, info->name,
@@ -125,11 +127,16 @@ int dma_create_sysfs_files(struct dma_channel *chan, struct dma_info *info)
if (ret)
return ret;
- sysdev_create_file(dev, &attr_dev_id);
- sysdev_create_file(dev, &attr_count);
- sysdev_create_file(dev, &attr_mode);
- sysdev_create_file(dev, &attr_flags);
- sysdev_create_file(dev, &attr_config);
+ ret |= sysdev_create_file(dev, &attr_dev_id);
+ ret |= sysdev_create_file(dev, &attr_count);
+ ret |= sysdev_create_file(dev, &attr_mode);
+ ret |= sysdev_create_file(dev, &attr_flags);
+ ret |= sysdev_create_file(dev, &attr_config);
+
+ if (unlikely(ret)) {
+ dev_err(&info->pdev->dev, "Failed creating attrs\n");
+ return ret;
+ }
snprintf(name, sizeof(name), "dma%d", chan->chan);
return sysfs_create_link(&info->pdev->dev.kobj, &dev->kobj, name);