tree: https://android.googlesource.com/kernel/common android-4.19 head: 7e9cfddda463ca301b5546efeebc3127d98c6ee0 commit: 5dfdaa15caebc782d1c90ff6513d4cc9f6ac3663 [4/5] ANDROID: GKI: usb: xhci: Add support for secondary interrupters config: i386-randconfig-s001-20201019 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-dirty git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android-4.19 git checkout 5dfdaa15caebc782d1c90ff6513d4cc9f6ac3663 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" drivers/usb/host/xhci-mem.c:936:6: sparse: sparse: symbol 'xhci_free_virt_devices_depth_first' was not declared. Should it be static? drivers/usb/host/xhci-mem.c:936:6: warning: no previous prototype for 'xhci_free_virt_devices_depth_first' [-Wmissing-prototypes] 936 | void xhci_free_virt_devices_depth_first(struct xhci_hcd *xhci, int slot_id) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/usb/host/xhci-mem.c:1840:6: warning: no previous prototype for 'xhci_handle_sec_intr_events' [-Wmissing-prototypes] 1840 | void xhci_handle_sec_intr_events(struct xhci_hcd *xhci, int intr_num) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/usb/host/xhci-mem.c:1947:6: warning: no previous prototype for 'xhci_event_ring_cleanup' [-Wmissing-prototypes] 1947 | void xhci_event_ring_cleanup(struct xhci_hcd *xhci) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/usb/host/xhci-mem.c:2486:5: warning: no previous prototype for 'xhci_event_ring_setup' [-Wmissing-prototypes] 2486 | int xhci_event_ring_setup(struct xhci_hcd *xhci, struct xhci_ring **er, | ^~~~~~~~~~~~~~~~~~~~~ drivers/usb/host/xhci-mem.c:2590:5: warning: no previous prototype for 'xhci_event_ring_init' [-Wmissing-prototypes] 2590 | int xhci_event_ring_init(struct xhci_hcd *xhci, gfp_t flags) | ^~~~~~~~~~~~~~~~~~~~ drivers/usb/host/xhci-mem.c:365: warning: Function parameter or member 'xhci' not described in 'xhci_ring_alloc' drivers/usb/host/xhci-mem.c:365: warning: Function parameter or member 'num_segs' not described in 'xhci_ring_alloc' drivers/usb/host/xhci-mem.c:365: warning: Function parameter or member 'cycle_state' not described in 'xhci_ring_alloc' drivers/usb/host/xhci-mem.c:365: warning: Function parameter or member 'type' not described in 'xhci_ring_alloc' drivers/usb/host/xhci-mem.c:365: warning: Function parameter or member 'max_packet' not described in 'xhci_ring_alloc' drivers/usb/host/xhci-mem.c:365: warning: Function parameter or member 'flags' not described in 'xhci_ring_alloc' vim +1880 drivers/usb/host/xhci-mem.c 1839 1841 { 1842 union xhci_trb *erdp_trb, *current_trb; 1843 struct xhci_segment *seg; 1844 u64 erdp_reg; 1845 u32 iman_reg; 1846 dma_addr_t deq; 1847 unsigned long segment_offset; 1848 1849 /* disable irq, ack pending interrupt and ack all pending events */ 1850 1851 iman_reg = 1852 readl_relaxed(&xhci->sec_ir_set[intr_num]->irq_pending); 1853 iman_reg &= ~IMAN_IE; 1854 writel_relaxed(iman_reg, 1855 &xhci->sec_ir_set[intr_num]->irq_pending); 1856 iman_reg = 1857 readl_relaxed(&xhci->sec_ir_set[intr_num]->irq_pending); 1858 if (iman_reg & IMAN_IP) 1859 writel_relaxed(iman_reg, 1860 &xhci->sec_ir_set[intr_num]->irq_pending); 1861 1862 /* last acked event trb is in erdp reg */ 1863 erdp_reg = 1864 xhci_read_64(xhci, &xhci->sec_ir_set[intr_num]->erst_dequeue); 1865 deq = (dma_addr_t)(erdp_reg & ~ERST_PTR_MASK); 1866 if (!deq) { 1867 pr_debug("%s: event ring handling not required\n", __func__); 1868 return; 1869 } 1870 1871 seg = xhci->sec_event_ring[intr_num]->first_seg; 1872 segment_offset = deq - seg->dma; 1873 1874 /* find out virtual address of the last acked event trb */ 1875 erdp_trb = current_trb = &seg->trbs[0] + 1876 (segment_offset/sizeof(*current_trb)); 1877 1878 /* read cycle state of the last acked trb to find out CCS */ 1879 xhci->sec_event_ring[intr_num]->cycle_state = 1881 1882 while (1) { 1883 /* last trb of the event ring: toggle cycle state */ 1884 if (current_trb == &seg->trbs[TRBS_PER_SEGMENT - 1]) { 1885 xhci->sec_event_ring[intr_num]->cycle_state ^= 1; 1886 current_trb = &seg->trbs[0]; 1887 } else { 1888 current_trb++; 1889 } 1890 1891 /* cycle state transition */ 1892 if ((le32_to_cpu(current_trb->event_cmd.flags) & TRB_CYCLE) != 1893 xhci->sec_event_ring[intr_num]->cycle_state) 1894 break; 1895 } 1896 1897 if (erdp_trb != current_trb) { 1898 deq = 1899 xhci_trb_virt_to_dma(xhci->sec_event_ring[intr_num]->deq_seg, 1900 current_trb); 1901 if (deq == 0) 1902 xhci_warn(xhci, 1903 "WARN invalid SW event ring dequeue ptr.\n"); 1904 /* Update HC event ring dequeue pointer */ 1905 erdp_reg &= ERST_PTR_MASK; 1906 erdp_reg |= ((u64) deq & (u64) ~ERST_PTR_MASK); 1907 } 1908 1909 /* Clear the event handler busy flag (RW1C); event ring is empty. */ 1910 erdp_reg |= ERST_EHB; 1911 xhci_write_64(xhci, erdp_reg, 1912 &xhci->sec_ir_set[intr_num]->erst_dequeue); 1913 } 1914 1915 int xhci_sec_event_ring_cleanup(struct usb_hcd *hcd, unsigned int intr_num) 1916 { 1917 int size; 1918 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 1919 struct device *dev = xhci_to_hcd(xhci)->self.sysdev; 1920 1921 if (intr_num >= xhci->max_interrupters) { 1922 xhci_err(xhci, "invalid secondary interrupter num %d\n", 1923 intr_num); 1924 return -EINVAL; 1925 } 1926 1927 size = 1928 sizeof(struct xhci_erst_entry)*(xhci->sec_erst[intr_num].num_entries); 1929 if (xhci->sec_erst[intr_num].entries) { 1930 xhci_handle_sec_intr_events(xhci, intr_num); 1931 dma_free_coherent(dev, size, xhci->sec_erst[intr_num].entries, 1932 xhci->sec_erst[intr_num].erst_dma_addr); 1933 xhci->sec_erst[intr_num].entries = NULL; 1934 } 1935 xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Freed SEC ERST#%d", 1936 intr_num); 1937 if (xhci->sec_event_ring[intr_num]) 1938 xhci_ring_free(xhci, xhci->sec_event_ring[intr_num]); 1939 1940 xhci->sec_event_ring[intr_num] = NULL; 1941 xhci_dbg_trace(xhci, trace_xhci_dbg_init, 1942 "Freed sec event ring"); 1943 1944 return 0; 1945 } 1946 1948 { 1949 unsigned int i; 1950 1951 /* sec event ring clean up */ 1952 for (i = 1; i < xhci->max_interrupters; i++) 1953 xhci_sec_event_ring_cleanup(xhci_to_hcd(xhci), i); 1954 1955 kfree(xhci->sec_ir_set); 1956 xhci->sec_ir_set = NULL; 1957 kfree(xhci->sec_erst); 1958 xhci->sec_erst = NULL; 1959 kfree(xhci->sec_event_ring); 1960 xhci->sec_event_ring = NULL; 1961 1962 /* primary event ring clean up */ 1963 xhci_free_erst(xhci, &xhci->erst); 1964 xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Freed primary ERST"); 1965 if (xhci->event_ring) 1966 xhci_ring_free(xhci, xhci->event_ring); 1967 xhci->event_ring = NULL; 1968 xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Freed priamry event ring"); 1969 } 1970 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org