lkml.org 
[lkml]   [2012]   [May]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[ 019/117] cfg80211: warn if db.txt is empty with CONFIG_CFG80211_INTERNAL_REGDB
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------
From: "Luis R. Rodriguez" <mcgrof@frijolero.org>

commit 80007efeff0568375b08faf93c7aad65602cb97e upstream.

It has happened twice now where elaborate troubleshooting has
undergone on systems where CONFIG_CFG80211_INTERNAL_REGDB [0]
has been set but yet net/wireless/db.txt was not updated.

Despite the documentation on this it seems system integrators could
use some more help with this, so throw out a kernel warning at boot time
when their database is empty.

This does mean that the error-prone system integrator won't likely
realize the issue until they boot the machine but -- it does not seem
to make sense to enable a build bug breaking random build testing.

[0] http://wireless.kernel.org/en/developers/Regulatory/CRDA#CONFIG_CFG80211_INTERNAL_REGDB

Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Youngsin Lee <youngsin@qualcomm.com>
Cc: Raja Mani <rmani@qca.qualcomm.com>
Cc: Senthil Kumar Balasubramanian <senthilb@qca.qualcomm.com>
Cc: Vipin Mehta <vipimeht@qca.qualcomm.com>
Cc: yahuan@qca.qualcomm.com
Cc: jjan@qca.qualcomm.com
Cc: vthiagar@qca.qualcomm.com
Cc: henrykim@qualcomm.com
Cc: jouni@qca.qualcomm.com
Cc: athiruve@qca.qualcomm.com
Cc: cjkim@qualcomm.com
Cc: philipk@qca.qualcomm.com
Cc: sunnykim@qualcomm.com
Cc: sskwak@qualcomm.com
Cc: kkim@qualcomm.com
Cc: mattbyun@qualcomm.com
Cc: ryanlee@qualcomm.com
Cc: simbap@qualcomm.com
Cc: krislee@qualcomm.com
Cc: conner@qualcomm.com
Cc: hojinkim@qualcomm.com
Cc: honglee@qualcomm.com
Cc: johnwkim@qualcomm.com
Cc: jinyong@qca.qualcomm.com
Signed-off-by: Luis R. Rodriguez <mcgrof@frijolero.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
net/wireless/reg.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index e9a0ac8..15f3474 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -388,7 +388,15 @@ static void reg_regdb_query(const char *alpha2)

schedule_work(&reg_regdb_work);
}
+
+/* Feel free to add any other sanity checks here */
+static void reg_regdb_size_check(void)
+{
+ /* We should ideally BUILD_BUG_ON() but then random builds would fail */
+ WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
+}
#else
+static inline void reg_regdb_size_check(void) {}
static inline void reg_regdb_query(const char *alpha2) {}
#endif /* CONFIG_CFG80211_INTERNAL_REGDB */

@@ -2322,6 +2330,8 @@ int __init regulatory_init(void)
spin_lock_init(&reg_requests_lock);
spin_lock_init(&reg_pending_beacons_lock);

+ reg_regdb_size_check();
+
cfg80211_regdomain = cfg80211_world_regdom;

user_alpha2[0] = '9';



\
 
 \ /
  Last update: 2012-05-28 06:41    [from the cache]
©2003-2011 Jasper Spaans