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wl12xx: allow runtime changing of debug_level

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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>
This commit is contained in:
Eliad Peller
2010-12-12 12:15:35 +02:00
committed by Luciano Coelho
parent ea559b4605
commit 17c1755c24
3 changed files with 20 additions and 9 deletions
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5
drivers/net/wireless/wl12xx/debugfs.c
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@@ -401,6 +401,11 @@ static int wl1271_debugfs_add_files(struct wl1271 *wl)
DEBUGFS_ADD(gpio_power, wl->rootdir);
entry = debugfs_create_x32("debug_level", 0600, wl->rootdir,
&wl12xx_debug_level);
if (!entry || IS_ERR(entry))
goto err;
return 0;
err: