Hi Shun,

FYI, there are new smatch warnings show up in

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next
head:   cef0af8f885262c86d1afa1d9ad6b7fd18b96637
commit: 8b3fa849abc2b62920d7e4fc4f8e6ce3d0783623 [52/59] [SCSI] mvumi: Add support for Marvell SAS/SATA RAID-on-Chip(ROC) 88RC9580

All smatch warnings:

  drivers/scsi/mvumi.c:267 mvumi_internal_cmd_sgl() Error invalid range 4096 to -1
  drivers/scsi/mvumi.c:322 mvumi_delete_internal_cmd() Error invalid range 4096 to -1
+ drivers/scsi/mvumi.c:1504 mvumi_detach_devices() error: dereferencing freed memory 'mv_dev'
  drivers/scsi/mvumi.c:1510 mvumi_detach_devices() error: dereferencing freed memory 'mv_dev'
+ drivers/scsi/mvumi.c:1687 mvumi_proc_msg() Error invalid range 4096 to -1
  drivers/scsi/mvumi.c:1807 mvumi_handle_clob() Error invalid range 4096 to -1
+ drivers/scsi/mvumi.c:2242 mvumi_cfg_hw_reg() warn: returning -1 instead of -ENOMEM is sloppy
  drivers/scsi/mvumi.c:2294 mvumi_cfg_hw_reg() warn: returning -1 instead of -ENOMEM is sloppy

vim +1504 drivers/scsi/mvumi.c
  1494		struct scsi_device *sdev = NULL;
  1495	
  1496		spin_lock_irqsave(&mhba->device_lock, flags);
  1497	
  1498		/* detach Hard Disk */
  1499		list_for_each_entry_safe(mv_dev, dev_next,
  1500			&mhba->shost_dev_list, list) {
  1501			mvumi_handle_hotplug(mhba, mv_dev->id, DEVICE_OFFLINE);
  1502			list_del_init(&mv_dev->list);
  1503			kfree(mv_dev);
> 1504			dev_dbg(&mhba->pdev->dev, "release device(0:%d:0) wwid(%llx)\n",
  1505				mv_dev->id, mv_dev->wwid);
  1506		}
  1507		list_for_each_entry_safe(mv_dev, dev_next, &mhba->mhba_dev_list, list) {
  1508			list_del_init(&mv_dev->list);
  1509			kfree(mv_dev);
  1510			dev_dbg(&mhba->pdev->dev, "release device(0:%d:0) wwid(%llx)\n",
  1511				mv_dev->id, mv_dev->wwid);
  1512		}
  1513	
  1514		/* detach virtual device */

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0-DAY kernel build testing backend         Open Source Technology Centre
Fengguang Wu, Yuanhan Liu                              Intel Corporation