Hi, [auto build test WARNING on scsi/for-next] [also build test WARNING on v4.7-rc3 next-20160609] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Charles-Chiou/scsi-stex-c-Support-Pegasus-3-product/20160614-142621 base: https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next config: x86_64-allmodconfig (attached as .config) compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/scsi/stex.c: In function 'stex_handshake': >> drivers/scsi/stex.c:1208:2: warning: 'scratch' may be used uninitialized in this function [-Wmaybe-uninitialized] memset(scratch, 0, scratch_size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/stex.c:1111:10: note: 'scratch' was declared here __le32 *scratch; ^~~~~~~ vim +/scratch +1208 drivers/scsi/stex.c 0f3f6ee6 Ed Lin 2009-03-31 1192 msleep(1); 0f3f6ee6 Ed Lin 2009-03-31 1193 } 2a48e931 Charles 2016-06-14 1194 } else { 2a48e931 Charles 2016-06-14 1195 while ((readl(base + MAILBOX_BASE + MAILBOX_HNDSHK_STS) 2a48e931 Charles 2016-06-14 1196 & SS_STS_HANDSHAKE) == 0) { 2a48e931 Charles 2016-06-14 1197 if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) { 2a48e931 Charles 2016-06-14 1198 printk(KERN_ERR DRV_NAME 2a48e931 Charles 2016-06-14 1199 "(%s): no signature after handshake frame\n", 2a48e931 Charles 2016-06-14 1200 pci_name(hba->pdev)); 2a48e931 Charles 2016-06-14 1201 ret = -1; 2a48e931 Charles 2016-06-14 1202 break; 2a48e931 Charles 2016-06-14 1203 } 2a48e931 Charles 2016-06-14 1204 rmb(); 2a48e931 Charles 2016-06-14 1205 msleep(1); 2a48e931 Charles 2016-06-14 1206 } 2a48e931 Charles 2016-06-14 1207 } 9eb46d2a Ed Lin 2009-09-28 @1208 memset(scratch, 0, scratch_size); 0f3f6ee6 Ed Lin 2009-03-31 1209 msg_h->flag = 0; 2a48e931 Charles 2016-06-14 1210 0f3f6ee6 Ed Lin 2009-03-31 1211 return ret; 0f3f6ee6 Ed Lin 2009-03-31 1212 } 0f3f6ee6 Ed Lin 2009-03-31 1213 0f3f6ee6 Ed Lin 2009-03-31 1214 static int stex_handshake(struct st_hba *hba) 0f3f6ee6 Ed Lin 2009-03-31 1215 { 0f3f6ee6 Ed Lin 2009-03-31 1216 int err; :::::: The code at line 1208 was first introduced by commit :::::: 9eb46d2a08de537e14e92216bf18e7cb541d2f67 [SCSI] stex: add support for reset request from firmware :::::: TO: Ed Lin <ed.lin@xxxxxxxxxxx> :::::: CC: James Bottomley <James.Bottomley@xxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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