diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2012-08-21 18:57:11 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-08-21 15:01:45 -0400 |
| commit | 4fc79db178f0a0ede479b4713e00df2d106028b3 (patch) | |
| tree | 2dd1358575382dc449e488e3dc7200f2c821b7cf | |
| parent | 94543a8d4fb302817014981489f15cb3b92ec3c2 (diff) | |
| download | linux-4fc79db178f0a0ede479b4713e00df2d106028b3.tar.gz | |
iwlwifi: protect SRAM debugfs
If the device is not started, we can't read its
SRAM and attempting to do so will cause issues.
Protect the debugfs read.
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/iwlwifi/dvm/debugfs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/dvm/debugfs.c b/drivers/net/wireless/iwlwifi/dvm/debugfs.c index 46782f1102ac7c..a47b306b522cd3 100644 --- a/drivers/net/wireless/iwlwifi/dvm/debugfs.c +++ b/drivers/net/wireless/iwlwifi/dvm/debugfs.c @@ -124,6 +124,9 @@ 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; |