Hi Gerd,

FYI, there are new sparse warnings show up in

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-next
head:   655db7980596f0ad4f15f8f4c51beb3e705762de
commit: e064852072c47b69f62325c6b7fa4a58332655bd [66/70] USB: uas: add locking

+ drivers/usb/storage/uas.c:638:12: sparse: context imbalance in 'uas_eh_task_mgmt' - wrong count at exit
  drivers/usb/storage/uas.c: In function 'uas_stat_cmplt':
  drivers/usb/storage/uas.c:280:15: warning: 'cmdinfo' may be used uninitialized in this function [-Wmaybe-uninitialized]

vim +638 drivers/usb/storage/uas.c

638 static int uas_eh_task_mgmt(struct scsi_cmnd *cmnd,
639                             const char *fname, u8 function)
640 {  
641         struct Scsi_Host *shost = cmnd->device->host;
642         struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
643         u16 tag = devinfo->qdepth - 1;
644         unsigned long flags;
645 
646         spin_lock_irqsave(&devinfo->lock, flags);
647         memset(&devinfo->response, 0, sizeof(devinfo->response));
648         if (uas_submit_sense_urb(shost, GFP_ATOMIC, tag)) {
649                 shost_printk(KERN_INFO, shost,
650                              "%s: %s: submit sense urb failed\n",
651                              __func__, fname);
652                 return FAILED;
653         }
654         if (uas_submit_task_urb(cmnd, GFP_ATOMIC, function, tag)) {
655                 shost_printk(KERN_INFO, shost,
656                              "%s: %s: submit task mgmt urb failed\n",
657                              __func__, fname);
658                 return FAILED;
659         }
660         spin_unlock_irqrestore(&devinfo->lock, flags);
661 
662         if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 3000) == 0) {
663                 shost_printk(KERN_INFO, shost,
664                              "%s: %s timed out\n", __func__, fname);
665                 return FAILED;
666         }
667         if (be16_to_cpu(devinfo->response.tag) != tag) {
668                 shost_printk(KERN_INFO, shost,
669                              "%s: %s failed (wrong tag %d/%d)\n", __func__,
670                              fname, be16_to_cpu(devinfo->response.tag), tag);
671                 return FAILED;
672         }

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