diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2014-02-27 09:52:56 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-11 16:10:09 -0700 |
| commit | 8234281aea5f98e5216a01d4955ce44025e95212 (patch) | |
| tree | 59c272acf46abd242dae6a40a9827072532a0d12 | |
| parent | 3ece09975ce21d9aa9a64d34d7f1f6ea179e8b4d (diff) | |
iwlwifi: protect SRAM debugfs
commit 4fc79db178f0a0ede479b4713e00df2d106028b3 upstream.
If the device is not started, we can't read its
SRAM and attempting to do so will cause issues.
Protect the debugfs read.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[wujg: Backported to 3.4: adjust context]
Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-debugfs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c index 2bbaebd99ad4..d587bcdda015 100644 --- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c +++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c @@ -227,6 +227,9 @@ static ssize_t iwl_dbgfs_sram_read(struct file *file, const struct fw_img *img; size_t bufsz; + if (!iwl_is_ready_rf(priv)) + return -EAGAIN; + /* default is to dump the entire data segment */ if (!priv->dbgfs_sram_offset && !priv->dbgfs_sram_len) { priv->dbgfs_sram_offset = 0x800000; |