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Date: Fri, 12 Jan 2024 08:27:03 +0800
From: kernel test robot <lkp@...el.com>
To: Jassi Brar <jaswinder.singh@...aro.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Felipe Balbi <balbi@...nel.org>
Subject: drivers/usb/gadget/udc/max3420_udc.c:555:41: sparse: sparse:
restricted __le16 degrades to integer
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 457e4f99765cc41d0b90e1385f51b848d6a921d0
commit: 48ba02b2e2b1a1c80718e93fefe99c8319597c4a usb: gadget: add udc driver for max3420
date: 3 years, 10 months ago
config: i386-randconfig-061-20240106 (https://download.01.org/0day-ci/archive/20240112/202401120851.7BJ9MPCT-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240112/202401120851.7BJ9MPCT-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401120851.7BJ9MPCT-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> drivers/usb/gadget/udc/max3420_udc.c:555:41: sparse: sparse: restricted __le16 degrades to integer
drivers/usb/gadget/udc/max3420_udc.c:556:31: sparse: sparse: restricted __le16 degrades to integer
>> drivers/usb/gadget/udc/max3420_udc.c:570:16: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short [assigned] [usertype] status @@ got restricted __le16 [usertype] @@
drivers/usb/gadget/udc/max3420_udc.c:570:16: sparse: expected unsigned short [assigned] [usertype] status
drivers/usb/gadget/udc/max3420_udc.c:570:16: sparse: got restricted __le16 [usertype]
drivers/usb/gadget/udc/max3420_udc.c:588:31: sparse: sparse: restricted __le16 degrades to integer
drivers/usb/gadget/udc/max3420_udc.c:602:32: sparse: sparse: restricted __le16 degrades to integer
>> drivers/usb/gadget/udc/max3420_udc.c:631:29: sparse: sparse: cast from restricted __le16
drivers/usb/gadget/udc/max3420_udc.c:632:29: sparse: sparse: cast from restricted __le16
drivers/usb/gadget/udc/max3420_udc.c:633:30: sparse: sparse: cast from restricted __le16
vim +555 drivers/usb/gadget/udc/max3420_udc.c
538
539 static void max3420_getstatus(struct max3420_udc *udc)
540 {
541 struct max3420_ep *ep;
542 u16 status = 0;
543
544 switch (udc->setup.bRequestType & USB_RECIP_MASK) {
545 case USB_RECIP_DEVICE:
546 /* Get device status */
547 status = udc->gadget.is_selfpowered << USB_DEVICE_SELF_POWERED;
548 status |= (udc->remote_wkp << USB_DEVICE_REMOTE_WAKEUP);
549 break;
550 case USB_RECIP_INTERFACE:
551 if (udc->driver->setup(&udc->gadget, &udc->setup) < 0)
552 goto stall;
553 break;
554 case USB_RECIP_ENDPOINT:
> 555 ep = &udc->ep[udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK];
556 if (udc->setup.wIndex & USB_DIR_IN) {
557 if (!ep->ep_usb.caps.dir_in)
558 goto stall;
559 } else {
560 if (!ep->ep_usb.caps.dir_out)
561 goto stall;
562 }
563 if (ep->halted)
564 status = 1 << USB_ENDPOINT_HALT;
565 break;
566 default:
567 goto stall;
568 }
569
> 570 status = cpu_to_le16(status);
571 spi_wr_buf(udc, MAX3420_REG_EP0FIFO, &status, 2);
572 spi_wr8_ack(udc, MAX3420_REG_EP0BC, 2, 1);
573 return;
574 stall:
575 dev_err(udc->dev, "Can't respond to getstatus request\n");
576 spi_wr8(udc, MAX3420_REG_EPSTALLS, STLEP0IN | STLEP0OUT | STLSTAT);
577 }
578
579 static void max3420_set_clear_feature(struct max3420_udc *udc)
580 {
581 struct max3420_ep *ep;
582 int set = udc->setup.bRequest == USB_REQ_SET_FEATURE;
583 unsigned long flags;
584 int id;
585
586 switch (udc->setup.bRequestType) {
587 case USB_RECIP_DEVICE:
588 if (udc->setup.wValue != USB_DEVICE_REMOTE_WAKEUP)
589 break;
590
591 if (udc->setup.bRequest == USB_REQ_SET_FEATURE)
592 udc->remote_wkp = 1;
593 else
594 udc->remote_wkp = 0;
595
596 return spi_ack_ctrl(udc);
597
598 case USB_RECIP_ENDPOINT:
599 if (udc->setup.wValue != USB_ENDPOINT_HALT)
600 break;
601
602 id = udc->setup.wIndex & USB_ENDPOINT_NUMBER_MASK;
603 ep = &udc->ep[id];
604
605 spin_lock_irqsave(&ep->lock, flags);
606 ep->todo &= ~STALL_EP;
607 if (set)
608 ep->todo |= STALL;
609 else
610 ep->todo |= UNSTALL;
611 spin_unlock_irqrestore(&ep->lock, flags);
612
613 spi_max3420_stall(ep);
614 return;
615 default:
616 break;
617 }
618
619 dev_err(udc->dev, "Can't respond to SET/CLEAR FEATURE\n");
620 spi_wr8(udc, MAX3420_REG_EPSTALLS, STLEP0IN | STLEP0OUT | STLSTAT);
621 }
622
623 static void max3420_handle_setup(struct max3420_udc *udc)
624 {
625 struct usb_ctrlrequest setup;
626 u8 addr;
627
628 spi_rd_buf(udc, MAX3420_REG_SUDFIFO, (void *)&setup, 8);
629
630 udc->setup = setup;
> 631 udc->setup.wValue = cpu_to_le16(setup.wValue);
632 udc->setup.wIndex = cpu_to_le16(setup.wIndex);
633 udc->setup.wLength = cpu_to_le16(setup.wLength);
634
635 switch (udc->setup.bRequest) {
636 case USB_REQ_GET_STATUS:
637 /* Data+Status phase form udc */
638 if ((udc->setup.bRequestType &
639 (USB_DIR_IN | USB_TYPE_MASK)) !=
640 (USB_DIR_IN | USB_TYPE_STANDARD)) {
641 break;
642 }
643 return max3420_getstatus(udc);
644 case USB_REQ_SET_ADDRESS:
645 /* Status phase from udc */
646 if (udc->setup.bRequestType != (USB_DIR_OUT |
647 USB_TYPE_STANDARD | USB_RECIP_DEVICE)) {
648 break;
649 }
650 addr = spi_rd8_ack(udc, MAX3420_REG_FNADDR, 1);
651 dev_dbg(udc->dev, "Assigned Address=%d\n", udc->setup.wValue);
652 return;
653 case USB_REQ_CLEAR_FEATURE:
654 case USB_REQ_SET_FEATURE:
655 /* Requests with no data phase, status phase from udc */
656 if ((udc->setup.bRequestType & USB_TYPE_MASK)
657 != USB_TYPE_STANDARD)
658 break;
659 return max3420_set_clear_feature(udc);
660 default:
661 break;
662 }
663
664 if (udc->driver->setup(&udc->gadget, &setup) < 0) {
665 /* Stall EP0 */
666 spi_wr8(udc, MAX3420_REG_EPSTALLS,
667 STLEP0IN | STLEP0OUT | STLSTAT);
668 }
669 }
670
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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