From 116b3a2e0fb79fbc2367f69167a7a84a4c864a2d Mon Sep 17 00:00:00 2001 From: Rishi Panjwani Date: Tue, 18 Oct 2011 17:20:06 -0700 Subject: [PATCH] ath6kl: Implement support for background scan control from userspace In order to allow user space based control of background scan interval, we use available debugfs infrastructure. The feature has been added for testing purposes. The user has to write the bgscan interval (in secs) to the bgscan_interval file in ath6kl debug directory. To disable bgscan, a '0' is to be written to the bgscan_interval file. Example: echo "2" > bgscan_interval This will make the background scan interval as 2 seconds kvalo: changed implementation so that there's only one call to ath6kl_wmi_scanparams_cmd() Signed-off-by: Rishi Panjwani Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath6kl/debug.c | 36 +++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/net/wireless/ath/ath6kl/debug.c b/drivers/net/wireless/ath/ath6kl/debug.c index e109f29f5862..bafc81058dcb 100644 --- a/drivers/net/wireless/ath/ath6kl/debug.c +++ b/drivers/net/wireless/ath/ath6kl/debug.c @@ -1455,6 +1455,39 @@ static const struct file_operations fops_delete_qos = { .llseek = default_llseek, }; +static ssize_t ath6kl_bgscan_int_write(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath6kl *ar = file->private_data; + u16 bgscan_int; + 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 (kstrtou16(buf, 0, &bgscan_int)) + return -EINVAL; + + if (bgscan_int == 0) + bgscan_int = 0xffff; + + ath6kl_wmi_scanparams_cmd(ar->wmi, 0, 0, bgscan_int, 0, 0, 0, 3, + 0, 0, 0); + + return count; +} + +static const struct file_operations fops_bgscan_int = { + .write = ath6kl_bgscan_int_write, + .open = ath6kl_debugfs_open, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + int ath6kl_debug_init(struct ath6kl *ar) { ar->debug.fwlog_buf.buf = vmalloc(ATH6KL_FWLOG_SIZE); @@ -1534,6 +1567,9 @@ int ath6kl_debug_init(struct ath6kl *ar) debugfs_create_file("delete_qos", S_IWUSR, ar->debugfs_phy, ar, &fops_delete_qos); + debugfs_create_file("bgscan_interval", S_IWUSR, + ar->debugfs_phy, ar, &fops_bgscan_int); + return 0; }