Hi Salah, [auto build test WARNING on staging/staging-testing] [also build test WARNING on v4.5 next-20160311] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Salah-Triki/staging-rtl8192u-Checking-return-value-propagating-errors/20160314-115621 config: i386-randconfig-c0-03141212 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 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/staging/rtl8192u/r8180_93cx6.c: In function 'eprom_read': >> drivers/staging/rtl8192u/r8180_93cx6.c:159:7: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized] ret |= (eprom_r(dev) << (15 - i)); ^ vim +/ret +159 drivers/staging/rtl8192u/r8180_93cx6.c 8fc8598e Jerry Chuang 2009-11-03 143 eprom_cs(dev, 1); 8fc8598e Jerry Chuang 2009-11-03 144 eprom_ck_cycle(dev); 8fc8598e Jerry Chuang 2009-11-03 145 eprom_send_bits_string(dev, read_cmd, 3); 8fc8598e Jerry Chuang 2009-11-03 146 eprom_send_bits_string(dev, addr_str, addr_len); 8fc8598e Jerry Chuang 2009-11-03 147 2ad99c50 Sanjeev Sharma 2014-07-31 148 /* 2ad99c50 Sanjeev Sharma 2014-07-31 149 * keep chip pin D to low state while reading. 2ad99c50 Sanjeev Sharma 2014-07-31 150 * I'm unsure if it is necessary, but anyway shouldn't hurt 2ad99c50 Sanjeev Sharma 2014-07-31 151 */ 8fc8598e Jerry Chuang 2009-11-03 152 eprom_w(dev, 0); 8fc8598e Jerry Chuang 2009-11-03 153 8fc8598e Jerry Chuang 2009-11-03 154 for (i = 0; i < 16; i++) { 2ad99c50 Sanjeev Sharma 2014-07-31 155 /* eeprom needs a clk cycle between writing opcode&adr 2ad99c50 Sanjeev Sharma 2014-07-31 156 * and reading data. (eeprom outs a dummy 0) 2ad99c50 Sanjeev Sharma 2014-07-31 157 */ 8fc8598e Jerry Chuang 2009-11-03 158 eprom_ck_cycle(dev); 8fc8598e Jerry Chuang 2009-11-03 @159 ret |= (eprom_r(dev) << (15 - i)); 8fc8598e Jerry Chuang 2009-11-03 160 } 8fc8598e Jerry Chuang 2009-11-03 161 8fc8598e Jerry Chuang 2009-11-03 162 eprom_cs(dev, 0); 8fc8598e Jerry Chuang 2009-11-03 163 eprom_ck_cycle(dev); 8fc8598e Jerry Chuang 2009-11-03 164 2ad99c50 Sanjeev Sharma 2014-07-31 165 /* disable EPROM programming */ 8fc8598e Jerry Chuang 2009-11-03 166 write_nic_byte_E(dev, EPROM_CMD, 8fc8598e Jerry Chuang 2009-11-03 167 (EPROM_CMD_NORMAL<<EPROM_CMD_OPERATING_MODE_SHIFT)); :::::: The code at line 159 was first introduced by commit :::::: 8fc8598e61f6f384f3eaf1d9b09500c12af47b37 Staging: Added Realtek rtl8192u driver to staging :::::: TO: Jerry Chuang <jerry-chuang@xxxxxxxxxxx> :::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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