linux-kernel - drivers/net/wireless/intel/iwlwifi/mvm/d3.c:2789 iwl_mvm_resume_firmware() error: uninitialized symbol 'd3

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Message-ID: <202302140947.nQROevUz-lkp@intel.com>
Date:   Tue, 14 Feb 2023 11:27:18 +0300
From:   Dan Carpenter <error27@...il.com>
To:     oe-kbuild@...ts.linux.dev,
        "Haim, Dreyfuss" <haim.dreyfuss@...el.com>
Cc:     lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Gregory Greenman <gregory.greenman@...el.com>
Subject: drivers/net/wireless/intel/iwlwifi/mvm/d3.c:2789
 iwl_mvm_resume_firmware() error: uninitialized symbol 'd3_status'.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f6feea56f66d34259c4222fa02e8171c4f2673d1
commit: b75dac847c9453d017d463a97e253416abf93d36 wifi: iwlwifi: mvm: trigger resume flow before wait for notifications
config: x86_64-randconfig-m001-20230213 (https://download.01.org/0day-ci/archive/20230214/202302140947.nQROevUz-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Reported-by: Dan Carpenter <error27@...il.com>
| Link: https://lore.kernel.org/r/202302140947.nQROevUz-lkp@intel.com/

smatch warnings:
drivers/net/wireless/intel/iwlwifi/mvm/d3.c:2789 iwl_mvm_resume_firmware() error: uninitialized symbol 'd3_status'.

vim +/d3_status +2789 drivers/net/wireless/intel/iwlwifi/mvm/d3.c

4da46a06d4430a Haim Dreyfuss  2022-09-06  2773  
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2774  static int iwl_mvm_resume_firmware(struct iwl_mvm *mvm, bool test)
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2775  {
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2776  	int ret;
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2777  	enum iwl_d3_status d3_status;
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2778  	struct iwl_host_cmd cmd = {
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2779  			.id = D0I3_END_CMD,
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2780  			.flags = CMD_WANT_SKB | CMD_SEND_IN_D3,
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2781  		};
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2782  	bool reset = fw_has_capa(&mvm->fw->ucode_capa,
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2783  				 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2784  
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2785  	ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test, !reset);
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2786  	if (ret)
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2787  		return ret;
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2788  
b75dac847c9453 Haim, Dreyfuss 2022-09-06 @2789  	if (d3_status != IWL_D3_STATUS_ALIVE) {

The iwl_trans_d3_resume() function does not initialize d3_status if
trans->ops->d3_resume is NULL.

b75dac847c9453 Haim, Dreyfuss 2022-09-06  2790  		IWL_INFO(mvm, "Device was reset during suspend\n");
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2791  		return -ENOENT;
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2792  	}
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2793  
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2794  	/*
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2795  	 * We should trigger resume flow using command only for 22000 family
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2796  	 * AX210 and above don't need the command since they have
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2797  	 * the doorbell interrupt.
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2798  	 */
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2799  	if (mvm->trans->trans_cfg->device_family <= IWL_DEVICE_FAMILY_22000 &&
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2800  	    fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_D0I3_END_FIRST)) {
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2801  		ret = iwl_mvm_send_cmd(mvm, &cmd);
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2802  		if (ret < 0)
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2803  			IWL_ERR(mvm, "Failed to send D0I3_END_CMD first (%d)\n",
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2804  				ret);
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2805  	}
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2806  
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2807  	return ret;
b75dac847c9453 Haim, Dreyfuss 2022-09-06  2808  }

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests