| From | Greg Kroah-Hartman <> | Subject | [ 211/262] iwlwifi: protect SRAM debugfs | Date | Fri, 28 Sep 2012 11:52:20 -0700 |
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From: Greg KH <gregkh@linuxfoundation.org>
3.5-stable review patch. If anyone has any objections, please let me know.
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From: Johannes Berg <johannes.berg@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.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/net/wireless/iwlwifi/iwl-debugfs.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c +++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c @@ -128,6 +128,9 @@ static ssize_t iwl_dbgfs_sram_read(struc 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;
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