ath9k: simplify debugfs chainmask handling

Writing to that file is unnecessary and quirky, the antenna API should
be used instead. Use debugfs_create_u8 to allow reading the values.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 88 deletions

diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index e5c8333eb55a..c088744a6bfb 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -88,90 +88,6 @@ static const struct file_operations fops_debug = {
 
 #define DMA_BUF_LEN 1024
 
-static ssize_t read_file_tx_chainmask(struct file *file, char __user *user_buf,
-                             size_t count, loff_t *ppos)
-{
-        struct ath_softc *sc = file->private_data;
-        struct ath_hw *ah = sc->sc_ah;
-        char buf[32];
-        unsigned int len;
-
-        len = sprintf(buf, "0x%08x\n", ah->txchainmask);
-        return simple_read_from_buffer(user_buf, count, ppos, buf, len);
-}
-
-static ssize_t write_file_tx_chainmask(struct file *file, const char __user *user_buf,
-                             size_t count, loff_t *ppos)
-{
-        struct ath_softc *sc = file->private_data;
-        struct ath_hw *ah = sc->sc_ah;
-        unsigned long mask;
-        char buf[32];
-        ssize_t len;
-
-        len = min(count, sizeof(buf) - 1);
-        if (copy_from_user(buf, user_buf, len))
-                return -EFAULT;
-
-        buf[len] = '\0';
-        if (kstrtoul(buf, 0, &mask))
-                return -EINVAL;
-
-        ah->txchainmask = mask;
-        ah->caps.tx_chainmask = mask;
-        return count;
-}
-
-static const struct file_operations fops_tx_chainmask = {
-        .read = read_file_tx_chainmask,
-        .write = write_file_tx_chainmask,
-        .open = simple_open,
-        .owner = THIS_MODULE,
-        .llseek = default_llseek,
-};
-
-
-static ssize_t read_file_rx_chainmask(struct file *file, char __user *user_buf,
-                             size_t count, loff_t *ppos)
-{
-        struct ath_softc *sc = file->private_data;
-        struct ath_hw *ah = sc->sc_ah;
-        char buf[32];
-        unsigned int len;
-
-        len = sprintf(buf, "0x%08x\n", ah->rxchainmask);
-        return simple_read_from_buffer(user_buf, count, ppos, buf, len);
-}
-
-static ssize_t write_file_rx_chainmask(struct file *file, const char __user *user_buf,
-                             size_t count, loff_t *ppos)
-{
-        struct ath_softc *sc = file->private_data;
-        struct ath_hw *ah = sc->sc_ah;
-        unsigned long mask;
-        char buf[32];
-        ssize_t len;
-
-        len = min(count, sizeof(buf) - 1);
-        if (copy_from_user(buf, user_buf, len))
-                return -EFAULT;
-
-        buf[len] = '\0';
-        if (kstrtoul(buf, 0, &mask))
-                return -EINVAL;
-
-        ah->rxchainmask = mask;
-        ah->caps.rx_chainmask = mask;
-        return count;
-}
-
-static const struct file_operations fops_rx_chainmask = {
-        .read = read_file_rx_chainmask,
-        .write = write_file_rx_chainmask,
-        .open = simple_open,
-        .owner = THIS_MODULE,
-        .llseek = default_llseek,
-};
 
 static ssize_t read_file_ani(struct file *file, char __user *user_buf,
                              size_t count, loff_t *ppos)
@@ -1896,10 +1812,10 @@ int ath9k_init_debug(struct ath_hw *ah)
                             &fops_reset);
         debugfs_create_file("recv", S_IRUSR, sc->debug.debugfs_phy, sc,
                             &fops_recv);
-        debugfs_create_file("rx_chainmask", S_IRUSR | S_IWUSR,
-                            sc->debug.debugfs_phy, sc, &fops_rx_chainmask);
-        debugfs_create_file("tx_chainmask", S_IRUSR | S_IWUSR,
-                            sc->debug.debugfs_phy, sc, &fops_tx_chainmask);
+        debugfs_create_u8("rx_chainmask", S_IRUSR, sc->debug.debugfs_phy,
+                          &ah->rxchainmask);
+        debugfs_create_u8("tx_chainmask", S_IRUSR, sc->debug.debugfs_phy,
+                          &ah->txchainmask);
         debugfs_create_file("ani", S_IRUSR | S_IWUSR,
                             sc->debug.debugfs_phy, sc, &fops_ani);
         debugfs_create_bool("paprd", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,