iwlwifi: mvm: write the correct internal TXF index

commit e7c9bd1cc632e924a69bf704385484386bb10933 upstream.

The TX fifos are arranged consecutively in the SMEM, beginning
with the regular fifos, and tailed by the internal fifos.
In the current code, while trying to read the internal fifos,
we read the fifos beginning with the index zero.
By doing this we actually re-read the regular fifos.

In order to read the internal fifos, start the reading index
from the number of regular fifos configured by the fw.

Signed-off-by: Golan Ben-Ami <golan.ben.ami@intel.com>
Fixes: 39654cb3a6a2 ("iwlwifi: don't access a nonexistent register upon assert")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c
index e1b6b2c665eb61b63be7297a5dc55b14dec40ca6..1abcabb9b6cd78d675c5a0585eb4ee59d98c3b1e 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c
@@ -288,7 +288,8 @@ static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
                        fifo_hdr->fifo_num = cpu_to_le32(i);
 
                        /* Mark the number of TXF we're pulling now */
-                       iwl_trans_write_prph(mvm->trans, TXF_CPU2_NUM, i);
+                       iwl_trans_write_prph(mvm->trans, TXF_CPU2_NUM, i +
+                               ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size));
 
                        fifo_hdr->available_bytes =
                                cpu_to_le32(iwl_trans_read_prph(mvm->trans,