Hi Peter, [auto build test WARNING on char-misc/char-misc-testing] [also build test WARNING on v4.10-rc8 next-20170216] [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/Peter-Huewe/Fix-whole-native-SPI-TPM-driver/20170217-010419 config: x86_64-randconfig-x001-201707 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 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/char/tpm/tpm_tis_spi.c: In function 'tpm_tis_spi_transfer': >> drivers/char/tpm/tpm_tis_spi.c:135:9: warning: 'ret' may be used >> uninitialized in this function [-Wmaybe-uninitialized] return ret; ^~~ vim +/ret +135 drivers/char/tpm/tpm_tis_spi.c dae9219c Peter Huewe 2017-02-16 119 spi_xfer.tx_buf = buffer; dae9219c Peter Huewe 2017-02-16 120 spi_xfer.rx_buf = NULL; dae9219c Peter Huewe 2017-02-16 121 } 0edbfea5 Christophe Ricard 2016-05-19 122 0edbfea5 Christophe Ricard 2016-05-19 123 spi_message_init(&m); 0edbfea5 Christophe Ricard 2016-05-19 124 spi_message_add_tail(&spi_xfer, &m); 0edbfea5 Christophe Ricard 2016-05-19 125 ret = spi_sync_locked(phy->spi_device, &m); 4dea582e Peter Huewe 2017-02-16 126 if (ret < 0) 4dea582e Peter Huewe 2017-02-16 127 goto exit; 4dea582e Peter Huewe 2017-02-16 128 4dea582e Peter Huewe 2017-02-16 129 len -= transfer_len; 4dea582e Peter Huewe 2017-02-16 130 buffer += transfer_len; 4dea582e Peter Huewe 2017-02-16 131 } 0edbfea5 Christophe Ricard 2016-05-19 132 0edbfea5 Christophe Ricard 2016-05-19 133 exit: 0edbfea5 Christophe Ricard 2016-05-19 134 spi_bus_unlock(phy->spi_device->master); 0edbfea5 Christophe Ricard 2016-05-19 @135 return ret; 0edbfea5 Christophe Ricard 2016-05-19 136 } 0edbfea5 Christophe Ricard 2016-05-19 137 dae9219c Peter Huewe 2017-02-16 138 static int tpm_tis_spi_read_bytes(struct tpm_tis_data *data, u32 addr, dae9219c Peter Huewe 2017-02-16 139 u16 len, u8 *result) 0edbfea5 Christophe Ricard 2016-05-19 140 { dae9219c Peter Huewe 2017-02-16 141 return tpm_tis_spi_transfer(data, addr, len, result, 0x80); 0edbfea5 Christophe Ricard 2016-05-19 142 } 0edbfea5 Christophe Ricard 2016-05-19 143 :::::: The code at line 135 was first introduced by commit :::::: 0edbfea537d10c0de5505d0413368aad71027663 tpm/tpm_tis_spi: Add support for spi phy :::::: TO: Christophe Ricard <christophe.ric...@gmail.com> :::::: CC: Jarkko Sakkinen <jarkko.sakki...@linux.intel.com> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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