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Commit 2493928e authored by Jeff Hansen's avatar Jeff Hansen Committed by John W. Linville
Browse files

ath9k: Add "debug" file to debugfs 



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: default avatarJeff Hansen <x@jeffhansen.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent bedf087a

drivers/net/wireless/ath/ath9k/debug.c

+38 −0
Original line number Diff line number Diff line
@@ -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);

}

drivers/net/wireless/ath/ath9k/debug.h

+1 −0
Original line number Diff line number Diff line
@@ -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;