Hi Zhang, kernel test robot noticed the following build errors: [auto build test ERROR on usb/usb-testing] [also build test ERROR on usb/usb-next usb/usb-linus char-misc/char-misc-testing char-misc/char-misc-next char-misc/char-misc-linus westeri-thunderbolt/next linus/master v6.4 next-20230630] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Zhang-Shurong/usb-r8a66597-hcd-host-fix-port-index-underflow-and-UBSAN-complains/20230701-223726 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing patch link: https://lore.kernel.org/r/tencent_71A3B792C0AA3D9E148E517B24BC6E006A09%40qq.com patch subject: [PATCH] usb: r8a66597-hcd: host: fix port index underflow and UBSAN complains config: mips-randconfig-r003-20230701 (https://download.01.org/0day-ci/archive/20230702/202307020021.86RVwiyt-lkp@xxxxxxxxx/config) compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a) reproduce: (https://download.01.org/0day-ci/archive/20230702/202307020021.86RVwiyt-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202307020021.86RVwiyt-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> drivers/usb/host/r8a66597-hcd.c:2147:11: error: invalid '-=' at end of declaration; did you mean '='? int port -= (port_index > 0); ^~ = 1 error generated. vim +2147 drivers/usb/host/r8a66597-hcd.c 2138 2139 static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 2140 u16 wIndex, char *buf, u16 wLength) 2141 { 2142 struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd); 2143 int ret; 2144 unsigned long flags; 2145 u32 port_index = wIndex & 0xFF; 2146 > 2147 int port -= (port_index > 0); 2148 struct r8a66597_root_hub *rh = &r8a66597->root_hub[port]; 2149 2150 ret = 0; 2151 2152 spin_lock_irqsave(&r8a66597->lock, flags); 2153 switch (typeReq) { 2154 case ClearHubFeature: 2155 case SetHubFeature: 2156 switch (wValue) { 2157 case C_HUB_OVER_CURRENT: 2158 case C_HUB_LOCAL_POWER: 2159 break; 2160 default: 2161 goto error; 2162 } 2163 break; 2164 case ClearPortFeature: 2165 if (wIndex > r8a66597->max_root_hub) 2166 goto error; 2167 if (wLength != 0) 2168 goto error; 2169 2170 switch (wValue) { 2171 case USB_PORT_FEAT_ENABLE: 2172 rh->port &= ~USB_PORT_STAT_POWER; 2173 break; 2174 case USB_PORT_FEAT_SUSPEND: 2175 break; 2176 case USB_PORT_FEAT_POWER: 2177 r8a66597_port_power(r8a66597, port, 0); 2178 break; 2179 case USB_PORT_FEAT_C_ENABLE: 2180 case USB_PORT_FEAT_C_SUSPEND: 2181 case USB_PORT_FEAT_C_CONNECTION: 2182 case USB_PORT_FEAT_C_OVER_CURRENT: 2183 case USB_PORT_FEAT_C_RESET: 2184 break; 2185 default: 2186 goto error; 2187 } 2188 rh->port &= ~(1 << wValue); 2189 break; 2190 case GetHubDescriptor: 2191 r8a66597_hub_descriptor(r8a66597, 2192 (struct usb_hub_descriptor *)buf); 2193 break; 2194 case GetHubStatus: 2195 *buf = 0x00; 2196 break; 2197 case GetPortStatus: 2198 if (wIndex > r8a66597->max_root_hub) 2199 goto error; 2200 *(__le32 *)buf = cpu_to_le32(rh->port); 2201 break; 2202 case SetPortFeature: 2203 if (wIndex > r8a66597->max_root_hub) 2204 goto error; 2205 if (wLength != 0) 2206 goto error; 2207 2208 switch (wValue) { 2209 case USB_PORT_FEAT_SUSPEND: 2210 break; 2211 case USB_PORT_FEAT_POWER: 2212 r8a66597_port_power(r8a66597, port, 1); 2213 rh->port |= USB_PORT_STAT_POWER; 2214 break; 2215 case USB_PORT_FEAT_RESET: { 2216 struct r8a66597_device *dev = rh->dev; 2217 2218 rh->port |= USB_PORT_STAT_RESET; 2219 2220 disable_r8a66597_pipe_all(r8a66597, dev); 2221 free_usb_address(r8a66597, dev, 1); 2222 2223 r8a66597_mdfy(r8a66597, USBRST, USBRST | UACT, 2224 get_dvstctr_reg(port)); 2225 mod_timer(&r8a66597->rh_timer, 2226 jiffies + msecs_to_jiffies(50)); 2227 } 2228 break; 2229 default: 2230 goto error; 2231 } 2232 rh->port |= 1 << wValue; 2233 break; 2234 default: 2235 error: 2236 ret = -EPIPE; 2237 break; 2238 } 2239 2240 spin_unlock_irqrestore(&r8a66597->lock, flags); 2241 return ret; 2242 } 2243 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
