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>
diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 80115ea..a42d631 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -44,6 +44,38 @@
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 @@
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 @@
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);
}