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Commit 4fc79db1 authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

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: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 94543a8d

drivers/net/wireless/iwlwifi/dvm/debugfs.c

+3 −0
Original line number Diff line number Diff line
@@ -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;