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authorJeff Hansen <x@jeffhansen.com>2009-05-27 12:48:29 +0000
committerJohn W. Linville <linville@tuxdriver.com>2009-06-03 14:05:11 -0400
commit2493928e4dbefa1869413cf24b7f605b9b69d0d2 (patch)
tree68dd75f350816eb36a435cc2a20ccb25cbf47e54
parentbedf087af96a24861d09586ac25c26691300ff4c (diff)
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 <x@jeffhansen.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/ath/ath9k/debug.c38
-rw-r--r--drivers/net/wireless/ath/ath9k/debug.h1
2 files changed, 39 insertions, 0 deletions
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;