wl12xx: allow runtime changing of debug_level

Currently, the debug level is set in compilation time (by the DEBUG_LEVEL
const). This method has the advantage of compiling only the relevant
messages, while optimizing out the unused ones.

In order to allow runtime control over the debug_level, while optimizing
out messages when debug messages are not needed, we combine some methods:
1. use dynamic_debug (pr_debug) rather then printk.
2. add debug_level module param in order to set debug level during insmod.
3. add debug_level sysfs file in order to allow dynamic control over the
   debug level.

Since patches for pr_debug_hex_dump() implementation haven't been applied yet,
we are still temporarly using print_hex_dump().

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index 0865585c8a75..8c50d3b3fabb 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -2833,6 +2833,11 @@ int wl1271_free_hw(struct wl1271 *wl)
 }
 EXPORT_SYMBOL_GPL(wl1271_free_hw);
 
+u32 wl12xx_debug_level;
+EXPORT_SYMBOL_GPL(wl12xx_debug_level);
+module_param_named(debug_level, wl12xx_debug_level, uint, DEBUG_NONE);
+MODULE_PARM_DESC(debug_level, "wl12xx debugging level");
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");