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>
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@ -44,6 +44,38 @@ static int ath9k_debugfs_open(struct inode *inode, struct file *file)
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return 0;
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}
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static ssize_t read_file_debug(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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char buf[32];
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unsigned int len = 0;
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len += snprintf(buf, sizeof(buf), "0x%08x\n", sc->debug.debug_mask);
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return simple_read_from_buffer(user_buf, count, ppos, buf, len);
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}
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static ssize_t write_file_debug(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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unsigned long mask;
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char buf[32];
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if (copy_from_user(buf, user_buf, (sizeof(buf) - 1) < count ?
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(sizeof(buf) - 1) : count))
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return 0;
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buf[sizeof(buf)-1] = 0;
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if (strict_strtoul(buf, 0, &mask) == 0)
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sc->debug.debug_mask = mask;
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return count;
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}
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static const struct file_operations fops_debug = {
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.read = read_file_debug,
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.write = write_file_debug,
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.open = ath9k_debugfs_open,
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.owner = THIS_MODULE
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};
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static ssize_t read_file_dma(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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@ -461,6 +493,11 @@ int ath9k_init_debug(struct ath_softc *sc)
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if (!sc->debug.debugfs_phy)
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goto err;
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sc->debug.debugfs_debug = debugfs_create_file("debug",
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S_IRUGO | S_IWUSR, sc->debug.debugfs_phy, sc, &fops_debug);
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if (!sc->debug.debugfs_debug)
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goto err;
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sc->debug.debugfs_dma = debugfs_create_file("dma", S_IRUGO,
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sc->debug.debugfs_phy, sc, &fops_dma);
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if (!sc->debug.debugfs_dma)
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@ -498,6 +535,7 @@ void ath9k_exit_debug(struct ath_softc *sc)
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debugfs_remove(sc->debug.debugfs_rcstat);
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debugfs_remove(sc->debug.debugfs_interrupt);
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debugfs_remove(sc->debug.debugfs_dma);
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debugfs_remove(sc->debug.debugfs_debug);
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debugfs_remove(sc->debug.debugfs_phy);
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}
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@ -95,6 +95,7 @@ struct ath_stats {
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struct ath9k_debug {
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int debug_mask;
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struct dentry *debugfs_phy;
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struct dentry *debugfs_debug;
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struct dentry *debugfs_dma;
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struct dentry *debugfs_interrupt;
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struct dentry *debugfs_rcstat;
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