From 2493928e4dbefa1869413cf24b7f605b9b69d0d2 Mon Sep 17 00:00:00 2001 From: Jeff Hansen Date: Wed, 27 May 2009 12:48:29 +0000 Subject: 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: Jeff Hansen Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/debug.c | 38 ++++++++++++++++++++++++++++++++++ drivers/net/wireless/ath/ath9k/debug.h | 1 + 2 files changed, 39 insertions(+) diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c index 80115ea07c7..a42d631e745 100644 --- a/drivers/net/wireless/ath/ath9k/debug.c +++ b/drivers/net/wireless/ath/ath9k/debug.c @@ -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); } diff --git a/drivers/net/wireless/ath/ath9k/debug.h b/drivers/net/wireless/ath/ath9k/debug.h index cf9146a6aaa..edda15bf2c1 100644 --- a/drivers/net/wireless/ath/ath9k/debug.h +++ b/drivers/net/wireless/ath/ath9k/debug.h @@ -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; -- cgit v1.2.3-70-g09d2