CC: kbuild-all(a)lists.01.org CC: linux-kernel(a)vger.kernel.org TO: Peng Fan <peng.fan(a)nxp.com&gt; CC: Jassi Brar <jaswinder.singh(a)linaro.org&gt; CC: Oleksij Rempel <o.rempel(a)pengutronix.de&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 4d41ead6ead97c3730bbd186a601a64828668f01 commit: 0a67003b1985c79811160af1b01aca07cd5fbc53 mailbox: imx: add SCU MU support date: 5 months ago :::::: branch date: 6 hours ago :::::: commit date: 5 months ago config: microblaze-randconfig-m031-20200828 (attached as .config) compiler: microblaze-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; New smatch warnings: drivers/mailbox/imx-mailbox.c:217 imx_mu_scu_rx() error: double unlocked 'priv->xcr_lock' (orig line 198) Old smatch warnings: arch/microblaze/include/asm/thread_info.h:94 current_thread_info() error: uninitialized symbol 'sp'. # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 0a67003b1985c79811160af1b01aca07cd5fbc53 vim +217 drivers/mailbox/imx-mailbox.c 0a67003b1985c7 Peng Fan 2020-03-19 189 0a67003b1985c7 Peng Fan 2020-03-19 190 static int imx_mu_scu_rx(struct imx_mu_priv *priv, 0a67003b1985c7 Peng Fan 2020-03-19 191 struct imx_mu_con_priv *cp) 0a67003b1985c7 Peng Fan 2020-03-19 192 { 0a67003b1985c7 Peng Fan 2020-03-19 193 struct imx_sc_rpc_msg_max msg; 0a67003b1985c7 Peng Fan 2020-03-19 194 u32 *data = (u32 *)&msg; 0a67003b1985c7 Peng Fan 2020-03-19 195 int i, ret; 0a67003b1985c7 Peng Fan 2020-03-19 196 u32 xsr; 0a67003b1985c7 Peng Fan 2020-03-19 197 0a67003b1985c7 Peng Fan 2020-03-19 @198 imx_mu_xcr_rmw(priv, 0, IMX_MU_xCR_RIEn(0)); 0a67003b1985c7 Peng Fan 2020-03-19 199 *data++ = imx_mu_read(priv, priv->dcfg->xRR[0]); 0a67003b1985c7 Peng Fan 2020-03-19 200 0a67003b1985c7 Peng Fan 2020-03-19 201 if (msg.hdr.size > sizeof(msg)) { 0a67003b1985c7 Peng Fan 2020-03-19 202 dev_err(priv->dev, "Exceed max msg size (%zu) on RX, got: %i\n", 0a67003b1985c7 Peng Fan 2020-03-19 203 sizeof(msg), msg.hdr.size); 0a67003b1985c7 Peng Fan 2020-03-19 204 return -EINVAL; 0a67003b1985c7 Peng Fan 2020-03-19 205 } 0a67003b1985c7 Peng Fan 2020-03-19 206 0a67003b1985c7 Peng Fan 2020-03-19 207 for (i = 1; i < msg.hdr.size; i++) { 0a67003b1985c7 Peng Fan 2020-03-19 208 ret = readl_poll_timeout(priv->base + priv->dcfg->xSR, xsr, 0a67003b1985c7 Peng Fan 2020-03-19 209 xsr & IMX_MU_xSR_RFn(i % 4), 0, 100); 0a67003b1985c7 Peng Fan 2020-03-19 210 if (ret) { 0a67003b1985c7 Peng Fan 2020-03-19 211 dev_err(priv->dev, "timeout read idx %d\n", i); 0a67003b1985c7 Peng Fan 2020-03-19 212 return ret; 0a67003b1985c7 Peng Fan 2020-03-19 213 } 0a67003b1985c7 Peng Fan 2020-03-19 214 *data++ = imx_mu_read(priv, priv->dcfg->xRR[i % 4]); 0a67003b1985c7 Peng Fan 2020-03-19 215 } 0a67003b1985c7 Peng Fan 2020-03-19 216 0a67003b1985c7 Peng Fan 2020-03-19 @217 imx_mu_xcr_rmw(priv, IMX_MU_xCR_RIEn(0), 0); 0a67003b1985c7 Peng Fan 2020-03-19 218 mbox_chan_received_data(cp->chan, (void *)&msg); 0a67003b1985c7 Peng Fan 2020-03-19 219 0a67003b1985c7 Peng Fan 2020-03-19 220 return 0; 0a67003b1985c7 Peng Fan 2020-03-19 221 } 0a67003b1985c7 Peng Fan 2020-03-19 222 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org