b43: Dynamically control log verbosity

Dynamically control the log verbosity with a module parameter.
This enables us to dynamically enable debugging messages (or disable
info, warn, error messages) via module parameter or /sys/module/b43/parameters/verbose.

This increases the module size by about 3k. But in practice it reduces the
module size for the user, because some distributions ship the b43 module
with CONFIG_B43_DEBUG set, which increases the module by about 15k.

So with this patch applied, distributions should really _disable_ CONFIG_B43_DEBUG.
There is no reason to keep it in a production-release kernel.
So we have a net reduction in size by about 12k.

This patch also adds a printk of the wireless core revision, so people
don't have to enable SSB debugging to get the wireless core revision.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/main.h b/drivers/net/wireless/b43/main.h
index e6d90f377d9b..40abcf5d1b43 100644
--- a/drivers/net/wireless/b43/main.h
+++ b/drivers/net/wireless/b43/main.h
@@ -40,6 +40,24 @@
 
 
 extern int b43_modparam_qos;
+extern int b43_modparam_verbose;
+
+/* Logmessage verbosity levels. Update the b43_modparam_verbose helptext, if
+ * you add or remove levels. */
+enum b43_verbosity {
+	B43_VERBOSITY_ERROR,
+	B43_VERBOSITY_WARN,
+	B43_VERBOSITY_INFO,
+	B43_VERBOSITY_DEBUG,
+	__B43_VERBOSITY_AFTERLAST, /* keep last */
+
+	B43_VERBOSITY_MAX = __B43_VERBOSITY_AFTERLAST - 1,
+#if B43_DEBUG
+	B43_VERBOSITY_DEFAULT = B43_VERBOSITY_DEBUG,
+#else
+	B43_VERBOSITY_DEFAULT = B43_VERBOSITY_INFO,
+#endif
+};
 
 
 /* Lightweight function to convert a frequency (in Mhz) to a channel number. */