3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johannes Berg <johannes.b...@intel.com>
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.b...@intel.com>
Signed-off-by: John W. Linville <linvi...@tuxdriver.com>
[bwh: Backported to 3.2:
- Adjust context
- Pass iwl_shared not iwl_priv pointer to iwl_is_ready_rf()]
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -232,6 +232,9 @@ static ssize_t iwl_dbgfs_sram_read(struc
struct iwl_priv *priv = file->private_data;
size_t bufsz;
+ if (!iwl_is_ready_rf(priv->shrd))
+ return -EAGAIN;
+
/* default is to dump the entire data segment */
if (!priv->dbgfs_sram_offset && !priv->dbgfs_sram_len) {
priv->dbgfs_sram_offset = 0x800000;
--
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