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iwlwifi: mvm: only send LEDS_CMD when the FW supports it 

The LEDS_CMD command is only supported in some newer FW versions
(e.g. iwlwifi-8000C-31.ucode), so we can't send it to older versions
(such as iwlwifi-8000C-27.ucode).

To fix this, check for a new bit in the FW capabilities TLV that tells
when the command is supported.

Note that the current version of -31.ucode in linux-firmware.git
(31.532993.0) does not have this capability bit set, so the LED won't
work, even though this version should support it.  But we will update
this firmware soon, so it won't be a problem anymore.

Fixes: 7089ae634c ("iwlwifi: mvm: use firmware LED command where applicable")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Luca Coelho 2017-09-07 10:51:52 +03:00 committed by Kalle Valo
parent 6d62269283
commit 2eabc84d2f
2 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/wireless/intel/iwlwifi/fw/file.h
View File

@ -378,6 +378,7 @@ enum iwl_ucode_tlv_capa {
IWL_UCODE_TLV_CAPA_EXTEND_SHARED_MEM_CFG = (__force iwl_ucode_tlv_capa_t)80,
IWL_UCODE_TLV_CAPA_LQM_SUPPORT = (__force iwl_ucode_tlv_capa_t)81,
IWL_UCODE_TLV_CAPA_TX_POWER_ACK = (__force iwl_ucode_tlv_capa_t)84,
IWL_UCODE_TLV_CAPA_LED_CMD_SUPPORT = (__force iwl_ucode_tlv_capa_t)86,
IWL_UCODE_TLV_CAPA_MLME_OFFLOAD = (__force iwl_ucode_tlv_capa_t)96,
NUM_IWL_UCODE_TLV_CAPA

3
drivers/net/wireless/intel/iwlwifi/mvm/led.c
View File

@ -92,7 +92,8 @@ static void iwl_mvm_send_led_fw_cmd(struct iwl_mvm *mvm, bool on)
static void iwl_mvm_led_set(struct iwl_mvm *mvm, bool on)
{
if (mvm->cfg->device_family >= IWL_DEVICE_FAMILY_8000) {
if (fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_LED_CMD_SUPPORT)) {
iwl_mvm_send_led_fw_cmd(mvm, on);
return;
}