drivers/usb/host/whci/qset.c:710:6: sparse: context imbalance in 'qset_remove_urb' - unexpected unlock

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   13e0988140374123bead1dd27c287354cb95108e
commit: edcafc0294589d5ad1220565ffd674007337cdc7 drm/amdgpu/virt: skip VM fault handler for VF
date:   6 weeks ago
reproduce:
        # apt-get install sparse
        git checkout edcafc0294589d5ad1220565ffd674007337cdc7
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

   drivers/usb/host/whci/qset.c:127:35: sparse: restricted __le16 degrades to integer
   drivers/usb/host/whci/qset.c:127:25: sparse: incorrect type in assignment (different base types)
   drivers/usb/host/whci/qset.c:127:25:    expected restricted __le16 [usertype] status
   drivers/usb/host/whci/qset.c:127:25:    got int
   drivers/usb/host/whci/qset.c:148:25: sparse: invalid assignment: &=
   drivers/usb/host/whci/qset.c:148:25:    left side has type restricted __le16
   drivers/usb/host/whci/qset.c:148:25:    right side has type int
   drivers/usb/host/whci/qset.c:237:21: sparse: restricted __le16 degrades to integer
>> drivers/usb/host/whci/qset.c:710:6: sparse: context imbalance in 'qset_remove_urb' - unexpected unlock
--
   arch/x86/include/asm/uaccess.h:714:18: sparse: incorrect type in argument 1 (different modifiers)
   arch/x86/include/asm/uaccess.h:714:18:    expected void *<noident>
   arch/x86/include/asm/uaccess.h:714:18:    got void const *from
>> drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1740:49: sparse: incorrect type in argument 1 (different address spaces)
   drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1740:49:    expected void [noderef] <asn:2>*ioaddr
   drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1740:49:    got struct mac_device_info *hw
--
>> drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c:244:16: sparse: restricted __le32 degrades to integer
   drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c:245:19: sparse: restricted __le32 degrades to integer
   drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c:249:23: sparse: restricted __le32 degrades to integer
   drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c:249:50: sparse: restricted __le32 degrades to integer
   drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c:267:13: sparse: restricted __le32 degrades to integer
--
>> arch/x86/include/asm/qspinlock.h:17:9: sparse: context imbalance in 'xfs_buf_rele' - different lock contexts for basic block
--
   include/linux/list.h:43:20: sparse: context imbalance in 'dlm_ctxt_release' - unexpected unlock
>> arch/x86/include/asm/qspinlock.h:17:9: sparse: context imbalance in 'dlm_query_nodeinfo_handler' - different lock contexts for basic block
--
>> arch/x86/include/asm/qspinlock.h:17:9: sparse: context imbalance in '__dlm_wait_on_lockres_flags' - unexpected unlock
   fs/ocfs2/dlm/dlmthread.c:260:17: sparse: context imbalance in 'dlm_purge_lockres' - unexpected unlock
   fs/ocfs2/dlm/dlmthread.c:305:9: sparse: context imbalance in 'dlm_run_purge_list' - different lock contexts for basic block
--
>> arch/x86/include/asm/qspinlock.h:17:9: sparse: context imbalance in 'dlm_empty_lockres' - unexpected unlock
   fs/ocfs2/dlm/dlmmaster.c:3294:28: sparse: context imbalance in 'dlm_reset_mleres_owner' - unexpected unlock
   fs/ocfs2/dlm/dlmmaster.c:3367:9: sparse: context imbalance in 'dlm_clean_master_list' - different lock contexts for basic block
--
   drivers/scsi/ipr.c:1040:13: sparse: context imbalance in 'ipr_send_blocking_cmd' - unexpected unlock
   drivers/scsi/ipr.c:5261:17: sparse: context imbalance in '__ipr_eh_dev_reset' - unexpected unlock
   drivers/scsi/ipr.c:7072:32: sparse: context imbalance in 'ipr_ioa_bringdown_done' - unexpected unlock
>> drivers/scsi/ipr.c:7141:9: sparse: context imbalance in 'ipr_ioa_reset_done' - unexpected unlock
   drivers/scsi/ipr.c:9167:48: sparse: context imbalance in 'ipr_initiate_ioa_reset' - unexpected unlock

vim +/qset_remove_urb +710 drivers/usb/host/whci/qset.c

7e6133aa David Vrabel 2008-09-17  694  		remaining -= std_len;
7e6133aa David Vrabel 2008-09-17  695  		transfer_dma += std_len;
7e6133aa David Vrabel 2008-09-17  696  	}
7e6133aa David Vrabel 2008-09-17  697  
7e6133aa David Vrabel 2008-09-17  698  	return 0;
7e6133aa David Vrabel 2008-09-17  699  
7e6133aa David Vrabel 2008-09-17  700  err_no_mem:
7e6133aa David Vrabel 2008-09-17  701  	qset_free_stds(qset, urb);
7e6133aa David Vrabel 2008-09-17  702  	return -ENOMEM;
7e6133aa David Vrabel 2008-09-17  703  }
7e6133aa David Vrabel 2008-09-17  704  
7e6133aa David Vrabel 2008-09-17  705  /**
7e6133aa David Vrabel 2008-09-17  706   * qset_remove_urb - remove an URB from the urb queue.
7e6133aa David Vrabel 2008-09-17  707   *
7e6133aa David Vrabel 2008-09-17  708   * The URB is returned to the USB subsystem.
7e6133aa David Vrabel 2008-09-17  709   */
7e6133aa David Vrabel 2008-09-17 @710  void qset_remove_urb(struct whc *whc, struct whc_qset *qset,
7e6133aa David Vrabel 2008-09-17  711  			    struct urb *urb, int status)
7e6133aa David Vrabel 2008-09-17  712  {
7e6133aa David Vrabel 2008-09-17  713  	struct wusbhc *wusbhc = &whc->wusbhc;
7e6133aa David Vrabel 2008-09-17  714  	struct whc_urb *wurb = urb->hcpriv;
7e6133aa David Vrabel 2008-09-17  715  
7e6133aa David Vrabel 2008-09-17  716  	usb_hcd_unlink_urb_from_ep(&wusbhc->usb_hcd, urb);
7e6133aa David Vrabel 2008-09-17  717  	/* Drop the lock as urb->complete() may enqueue another urb. */
7e6133aa David Vrabel 2008-09-17  718  	spin_unlock(&whc->lock);

:::::: The code at line 710 was first introduced by commit
:::::: 7e6133aa42920ea87ad9791a0fb2b95d1a23b8f9 wusb: WHCI host controller driver

:::::: TO: David Vrabel <david.vrabel@xxxxxxx>
:::::: CC: David Vrabel <dv02@xxxxxxxxxxxxxxxxxxxxxxxx>

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