Hi Liguo, [auto build test WARNING on wsa/i2c/for-next] [also build test WARNING on next-20160224] [cannot apply to v4.5-rc5] [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/Liguo-Zhang/i2c-mediatek-i2c-multi-transfer-optimization/20160225-160535 base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux i2c/for-next config: i386-allmodconfig (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): drivers/i2c/busses/i2c-mt65xx.c: In function 'mtk_i2c_transfer': >> drivers/i2c/busses/i2c-mt65xx.c:556:6: warning: unused variable 'left_num' [-Wunused-variable] int left_num = num; ^ vim +/left_num +556 drivers/i2c/busses/i2c-mt65xx.c 173b77e8d Liguo Zhang 2015-11-09 540 if (!i2c->auto_restart) { b2ed11e22 Eddie Huang 2015-05-21 541 start_reg = I2C_TRANSAC_START; b2ed11e22 Eddie Huang 2015-05-21 542 } else { b2ed11e22 Eddie Huang 2015-05-21 543 start_reg = I2C_TRANSAC_START | I2C_RS_MUL_TRIG; b2ed11e22 Eddie Huang 2015-05-21 544 if (left_num >= 1) b2ed11e22 Eddie Huang 2015-05-21 545 start_reg |= I2C_RS_MUL_CNFG; b2ed11e22 Eddie Huang 2015-05-21 546 } b2ed11e22 Eddie Huang 2015-05-21 547 writew(start_reg, i2c->base + OFFSET_START); ce38815d3 Xudong Chen 2015-05-21 548 ce38815d3 Xudong Chen 2015-05-21 549 return 0; ce38815d3 Xudong Chen 2015-05-21 550 } ce38815d3 Xudong Chen 2015-05-21 551 ce38815d3 Xudong Chen 2015-05-21 552 static int mtk_i2c_transfer(struct i2c_adapter *adap, ce38815d3 Xudong Chen 2015-05-21 553 struct i2c_msg msgs[], int num) ce38815d3 Xudong Chen 2015-05-21 554 { ce38815d3 Xudong Chen 2015-05-21 555 int ret; ce38815d3 Xudong Chen 2015-05-21 @556 int left_num = num; ce38815d3 Xudong Chen 2015-05-21 557 struct mtk_i2c *i2c = i2c_get_adapdata(adap); cc7e965fd Liguo Zhang 2016-02-25 558 struct mtk_i2c_transaction *i2c_transac = &i2c->transac; cc7e965fd Liguo Zhang 2016-02-25 559 cc7e965fd Liguo Zhang 2016-02-25 560 i2c_transac->num = num; cc7e965fd Liguo Zhang 2016-02-25 561 i2c_transac->index = 0; cc7e965fd Liguo Zhang 2016-02-25 562 i2c_transac->msgs = msgs; cc7e965fd Liguo Zhang 2016-02-25 563 i2c_transac->result = 0; cc7e965fd Liguo Zhang 2016-02-25 564 :::::: The code at line 556 was first introduced by commit :::::: ce38815d39eac9c73d37dd4b0039c87f15dcbe18 I2C: mediatek: Add driver for MediaTek I2C controller :::::: TO: Xudong Chen <xudong.chen@xxxxxxxxxxxx> :::::: CC: Wolfram Sang <wsa@xxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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