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ath9k: Add "debug" file to debugfs

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This patch adds the debug file to the ath9k debugfs, which lets you modify
the debug_mask at runtime, without having to reload the ath9k module.

Signed-off-by: Jeff Hansen <x@jeffhansen.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jeff Hansen 2009-05-27 12:48:29 +00:00 committed by John W. Linville
parent bedf087af9
commit 2493928e4d
2 changed files with 39 additions and 0 deletions
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38
drivers/net/wireless/ath/ath9k/debug.c
View file

@ -44,6 +44,38 @@ static int ath9k_debugfs_open(struct inode *inode, struct file *file)
return 0;
}
static ssize_t read_file_debug(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[32];
unsigned int len = 0;
len += snprintf(buf, sizeof(buf), "0x%08x\n", sc->debug.debug_mask);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t write_file_debug(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
unsigned long mask;
char buf[32];
if (copy_from_user(buf, user_buf, (sizeof(buf) - 1) < count ?
(sizeof(buf) - 1) : count))
return 0;
buf[sizeof(buf)-1] = 0;
if (strict_strtoul(buf, 0, &mask) == 0)
sc->debug.debug_mask = mask;
return count;
}
static const struct file_operations fops_debug = {
.read = read_file_debug,
.write = write_file_debug,
.open = ath9k_debugfs_open,
.owner = THIS_MODULE
};
static ssize_t read_file_dma(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
@ -461,6 +493,11 @@ int ath9k_init_debug(struct ath_softc *sc)
if (!sc->debug.debugfs_phy)
goto err;
sc->debug.debugfs_debug = debugfs_create_file("debug",
S_IRUGO | S_IWUSR, sc->debug.debugfs_phy, sc, &fops_debug);
if (!sc->debug.debugfs_debug)
goto err;
sc->debug.debugfs_dma = debugfs_create_file("dma", S_IRUGO,
sc->debug.debugfs_phy, sc, &fops_dma);
if (!sc->debug.debugfs_dma)
@ -498,6 +535,7 @@ void ath9k_exit_debug(struct ath_softc *sc)
debugfs_remove(sc->debug.debugfs_rcstat);
debugfs_remove(sc->debug.debugfs_interrupt);
debugfs_remove(sc->debug.debugfs_dma);
debugfs_remove(sc->debug.debugfs_debug);
debugfs_remove(sc->debug.debugfs_phy);
}

1
drivers/net/wireless/ath/ath9k/debug.h
View file

@ -95,6 +95,7 @@ struct ath_stats {
struct ath9k_debug {
int debug_mask;
struct dentry *debugfs_phy;
struct dentry *debugfs_debug;
struct dentry *debugfs_dma;
struct dentry *debugfs_interrupt;
struct dentry *debugfs_rcstat;