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authorSujith <Sujith.Manoharan@atheros.com>2009-03-09 09:32:01 +0530
committerJohn W. Linville <linville@tuxdriver.com>2009-03-16 18:09:38 -0400
commit62b4fb66c5611c4e2b9279810c2d037fb5b5fa68 (patch)
tree9040289449937542a1833365debac2a8fa45ca12
parentc37452b0687e5c8942dd4866f7c614105e6050c3 (diff)
ath9k: Fix bug in reading debugfs file 'rcstat'
The rate table would not have been chosen before the interface has been brought up. Reading 'rcstat' in this case would result in an oops, fix this. Signed-off-by: Sujith <Sujith.Manoharan@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/ath9k/debug.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath9k/debug.c b/drivers/net/wireless/ath9k/debug.c
index b0ff4792546..82573cadb1a 100644
--- a/drivers/net/wireless/ath9k/debug.c
+++ b/drivers/net/wireless/ath9k/debug.c
@@ -322,6 +322,9 @@ static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
{
struct ath_softc *sc = file->private_data;
+ if (sc->cur_rate_table == NULL)
+ return 0;
+
if (conf_is_ht(&sc->hw->conf))
return ath_read_file_stat_11n_rc(file, user_buf, count, ppos);
else