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From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: Re: [RFC PATCH v1 1/2] ufs: introduce callbacks to get command information
Date: Sun, 21 Jun 2020 03:48:53 +0800	[thread overview]
Message-ID: <202006210332.znUZzt7Y%lkp@intel.com> (raw)

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CC: kbuild-all(a)lists.01.org
In-Reply-To: <1592635992-35619-1-git-send-email-kwmad.kim@samsung.com>
References: <1592635992-35619-1-git-send-email-kwmad.kim@samsung.com>
TO: Kiwoong Kim <kwmad.kim@samsung.com>

Hi Kiwoong,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on scsi/for-next]
[also build test WARNING on mkp-scsi/for-next v5.8-rc1 next-20200618]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Kiwoong-Kim/ufs-introduce-callbacks-to-get-command-information/20200620-150310
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next
:::::: branch date: 13 hours ago
:::::: commit date: 13 hours ago
config: x86_64-randconfig-m001-20200620 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

smatch warnings:
drivers/scsi/ufs/ufshcd.c:2548 ufshcd_queuecommand() warn: variable dereferenced before check 'cmd' (see line 2475)

# https://github.com/0day-ci/linux/commit/cff1afd5a0773e6da9106e953721996a56a9332c
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout cff1afd5a0773e6da9106e953721996a56a9332c
vim +/cmd +2548 drivers/scsi/ufs/ufshcd.c

4d2b8d40dd754e Bart Van Assche    2020-01-22  2457  
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2458  /**
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2459   * ufshcd_queuecommand - main entry point for SCSI requests
8aa29f192ca675 Bart Van Assche    2018-03-01  2460   * @host: SCSI host pointer
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2461   * @cmd: command from SCSI Midlayer
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2462   *
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2463   * Returns 0 for success, non-zero in case of failure
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2464   */
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2465  static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2466  {
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2467  	struct ufshcd_lrb *lrbp;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2468  	struct ufs_hba *hba;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2469  	unsigned long flags;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2470  	int tag;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2471  	int err = 0;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2472  
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2473  	hba = shost_priv(host);
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2474  
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29 @2475  	tag = cmd->request->tag;
14497328b6a628 Yaniv Gardi        2016-02-01  2476  	if (!ufshcd_valid_tag(hba, tag)) {
14497328b6a628 Yaniv Gardi        2016-02-01  2477  		dev_err(hba->dev,
14497328b6a628 Yaniv Gardi        2016-02-01  2478  			"%s: invalid command tag %d: cmd=0x%p, cmd->request=0x%p",
14497328b6a628 Yaniv Gardi        2016-02-01  2479  			__func__, tag, cmd, cmd->request);
14497328b6a628 Yaniv Gardi        2016-02-01  2480  		BUG();
14497328b6a628 Yaniv Gardi        2016-02-01  2481  	}
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2482  
a3cd5ec55f6c72 Subhash Jadavani   2017-02-03  2483  	if (!down_read_trylock(&hba->clk_scaling_lock))
a3cd5ec55f6c72 Subhash Jadavani   2017-02-03  2484  		return SCSI_MLQUEUE_HOST_BUSY;
a3cd5ec55f6c72 Subhash Jadavani   2017-02-03  2485  
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2486  	spin_lock_irqsave(hba->host->host_lock, flags);
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2487  	switch (hba->ufshcd_state) {
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2488  	case UFSHCD_STATE_OPERATIONAL:
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2489  		break;
141f81651037ea Zang Leigang       2016-11-16  2490  	case UFSHCD_STATE_EH_SCHEDULED:
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2491  	case UFSHCD_STATE_RESET:
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2492  		err = SCSI_MLQUEUE_HOST_BUSY;
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2493  		goto out_unlock;
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2494  	case UFSHCD_STATE_ERROR:
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2495  		set_host_byte(cmd, DID_ERROR);
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2496  		cmd->scsi_done(cmd);
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2497  		goto out_unlock;
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2498  	default:
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2499  		dev_WARN_ONCE(hba->dev, 1, "%s: invalid state %d\n",
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2500  				__func__, hba->ufshcd_state);
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2501  		set_host_byte(cmd, DID_BAD_TARGET);
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2502  		cmd->scsi_done(cmd);
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2503  		goto out_unlock;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2504  	}
53c12d0ef6fcb7 Yaniv Gardi        2016-02-01  2505  
53c12d0ef6fcb7 Yaniv Gardi        2016-02-01  2506  	/* if error handling is in progress, don't issue commands */
53c12d0ef6fcb7 Yaniv Gardi        2016-02-01  2507  	if (ufshcd_eh_in_progress(hba)) {
53c12d0ef6fcb7 Yaniv Gardi        2016-02-01  2508  		set_host_byte(cmd, DID_ERROR);
53c12d0ef6fcb7 Yaniv Gardi        2016-02-01  2509  		cmd->scsi_done(cmd);
53c12d0ef6fcb7 Yaniv Gardi        2016-02-01  2510  		goto out_unlock;
53c12d0ef6fcb7 Yaniv Gardi        2016-02-01  2511  	}
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2512  	spin_unlock_irqrestore(hba->host->host_lock, flags);
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2513  
7fabb77b3aa016 Gilad Broner       2017-02-03  2514  	hba->req_abort_count = 0;
7fabb77b3aa016 Gilad Broner       2017-02-03  2515  
1ab27c9cf8b63d Sahitya Tummala    2014-09-25  2516  	err = ufshcd_hold(hba, true);
1ab27c9cf8b63d Sahitya Tummala    2014-09-25  2517  	if (err) {
1ab27c9cf8b63d Sahitya Tummala    2014-09-25  2518  		err = SCSI_MLQUEUE_HOST_BUSY;
1ab27c9cf8b63d Sahitya Tummala    2014-09-25  2519  		goto out;
1ab27c9cf8b63d Sahitya Tummala    2014-09-25  2520  	}
1ab27c9cf8b63d Sahitya Tummala    2014-09-25  2521  	WARN_ON(hba->clk_gating.state != CLKS_ON);
1ab27c9cf8b63d Sahitya Tummala    2014-09-25  2522  
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2523  	lrbp = &hba->lrb[tag];
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2524  
5a0b0cb9bee767 Sujit Reddy Thumma 2013-07-30  2525  	WARN_ON(lrbp->cmd);
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2526  	lrbp->cmd = cmd;
09a5a24ff36f90 Avri Altman        2018-11-22  2527  	lrbp->sense_bufflen = UFS_SENSE_SIZE;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2528  	lrbp->sense_buffer = cmd->sense_buffer;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2529  	lrbp->task_tag = tag;
0ce147d48a3e33 Subhash Jadavani   2014-09-25  2530  	lrbp->lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun);
b852190e589abe Yaniv Gardi        2015-05-17  2531  	lrbp->intr_cmd = !ufshcd_is_intr_aggr_allowed(hba) ? true : false;
e0b299e36004f5 Gilad Broner       2017-02-03  2532  	lrbp->req_abort_skip = false;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2533  
300bb13f5c7b1d Joao Pinto         2016-05-11  2534  	ufshcd_comp_scsi_upiu(hba, lrbp);
300bb13f5c7b1d Joao Pinto         2016-05-11  2535  
75b1cc4ad63afa Kiwoong Kim        2016-11-22  2536  	err = ufshcd_map_sg(hba, lrbp);
5a0b0cb9bee767 Sujit Reddy Thumma 2013-07-30  2537  	if (err) {
5a0b0cb9bee767 Sujit Reddy Thumma 2013-07-30  2538  		lrbp->cmd = NULL;
17c7d35f141ef6 Can Guo            2019-12-05  2539  		ufshcd_release(hba);
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2540  		goto out;
5a0b0cb9bee767 Sujit Reddy Thumma 2013-07-30  2541  	}
ad1a1b9cd67a4b Gilad Broner       2016-10-17  2542  	/* Make sure descriptors are ready before ringing the doorbell */
ad1a1b9cd67a4b Gilad Broner       2016-10-17  2543  	wmb();
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2544  
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2545  	/* issue command to the controller */
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2546  	spin_lock_irqsave(hba->host->host_lock, flags);
5905d4648e7ec2 Bart Van Assche    2020-01-22  2547  	ufshcd_vops_setup_xfer_req(hba, tag, true);
cff1afd5a0773e Kiwoong Kim        2020-06-20 @2548  	if (cmd)
cff1afd5a0773e Kiwoong Kim        2020-06-20  2549  		ufshcd_vops_cmd_log(hba, cmd, 1);
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2550  	ufshcd_send_command(hba, tag);
3441da7ddbdedf Sujit Reddy Thumma 2014-05-26  2551  out_unlock:
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2552  	spin_unlock_irqrestore(hba->host->host_lock, flags);
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2553  out:
a3cd5ec55f6c72 Subhash Jadavani   2017-02-03  2554  	up_read(&hba->clk_scaling_lock);
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2555  	return err;
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2556  }
7a3e97b0dc4bba Santosh Yaraganavi 2012-02-29  2557  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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             reply	other threads:[~2020-06-20 19:48 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-20 19:48 kernel test robot [this message]
     [not found] <CGME20200620070044epcas2p269e3c266c86c65dd0e894d8188036a30@epcas2p2.samsung.com>
2020-06-20  6:53 ` [RFC PATCH v1 1/2] ufs: introduce callbacks to get command information Kiwoong Kim
2020-06-20 16:33   ` Bart Van Assche
2020-06-23  2:28     ` Kiwoong Kim
2020-06-24  2:53       ` Bart Van Assche
2020-06-22 11:35   ` Dan Carpenter
2020-06-22 11:35     ` Dan Carpenter
2020-06-25 14:05   ` Stanley Chu
2020-06-26 11:42     ` Kiwoong Kim
2020-06-26 12:29       ` Stanley Chu
2020-06-29  7:01         ` Kiwoong Kim
2020-06-29  7:11         ` Kiwoong Kim

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