Messages in this thread | | | Date | Fri, 5 Nov 2021 20:31:51 +0800 | From | kernel test robot <> | Subject | [dinguyen:socfpga-5.14_v1 7/121] drivers/misc/altera_ilc.c:67:13: warning: variable 'ret' set but not used |
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Hi Dinh,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git socfpga-5.14_v1 head: cc7ba8d9b34b85acfbeefb77fa57c116c733c2c4 commit: 72ffec01d5fac567909fdf8c7e0bc2cc08228653 [7/121] FogBugz #236669: Add a Kconfig for ILC driver config: mips-allyesconfig (attached as .config) compiler: mips-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git/commit/?id=72ffec01d5fac567909fdf8c7e0bc2cc08228653 git remote add dinguyen https://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux.git git fetch --no-tags dinguyen socfpga-5.14_v1 git checkout 72ffec01d5fac567909fdf8c7e0bc2cc08228653 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=mips
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
drivers/misc/altera_ilc.c: In function 'ilc_show_counter': >> drivers/misc/altera_ilc.c:67:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable] 67 | int ret, i, id, fifo_len; | ^~~ drivers/misc/altera_ilc.c: In function 'ilc_work': drivers/misc/altera_ilc.c:110:33: warning: variable 'ret' set but not used [-Wunused-but-set-variable] 110 | unsigned int ilc_value, ret, offset, stp_reg; | ^~~
vim +/ret +67 drivers/misc/altera_ilc.c
326c1813f0b702 cnphoon 2014-02-21 63 326c1813f0b702 cnphoon 2014-02-21 64 static ssize_t ilc_show_counter(struct device *dev, 326c1813f0b702 cnphoon 2014-02-21 65 struct device_attribute *attr, char *buf) 326c1813f0b702 cnphoon 2014-02-21 66 { 326c1813f0b702 cnphoon 2014-02-21 @67 int ret, i, id, fifo_len; 326c1813f0b702 cnphoon 2014-02-21 68 unsigned int fifo_buf[ILC_MAX_PORTS]; 326c1813f0b702 cnphoon 2014-02-21 69 char temp[10]; 326c1813f0b702 cnphoon 2014-02-21 70 struct altera_ilc *ilc = dev_get_drvdata(dev); 326c1813f0b702 cnphoon 2014-02-21 71 326c1813f0b702 cnphoon 2014-02-21 72 fifo_len = 0; 326c1813f0b702 cnphoon 2014-02-21 73 ret = kstrtouint(attr->attr.name, 0, &id); 326c1813f0b702 cnphoon 2014-02-21 74 326c1813f0b702 cnphoon 2014-02-21 75 for (i = 0; i < ilc->port_count; i++) { 326c1813f0b702 cnphoon 2014-02-21 76 if (id == (ilc->interrupt_channels[i])) { 326c1813f0b702 cnphoon 2014-02-21 77 /*Check for kfifo length*/ 326c1813f0b702 cnphoon 2014-02-21 78 fifo_len = kfifo_len(&ilc->kfifos[i]) 326c1813f0b702 cnphoon 2014-02-21 79 /sizeof(unsigned int); 326c1813f0b702 cnphoon 2014-02-21 80 if (fifo_len <= 0) { 326c1813f0b702 cnphoon 2014-02-21 81 dev_info(&ilc->pdev->dev, "Fifo for interrupt %s is empty\n", 326c1813f0b702 cnphoon 2014-02-21 82 attr->attr.name); 326c1813f0b702 cnphoon 2014-02-21 83 return 0; 326c1813f0b702 cnphoon 2014-02-21 84 } 326c1813f0b702 cnphoon 2014-02-21 85 /*Read from kfifo*/ 326c1813f0b702 cnphoon 2014-02-21 86 ret = kfifo_out(&ilc->kfifos[i], &fifo_buf, 326c1813f0b702 cnphoon 2014-02-21 87 kfifo_len(&ilc->kfifos[i])); 326c1813f0b702 cnphoon 2014-02-21 88 } 326c1813f0b702 cnphoon 2014-02-21 89 } 326c1813f0b702 cnphoon 2014-02-21 90 326c1813f0b702 cnphoon 2014-02-21 91 for (i = 0; i < fifo_len; i++) { 326c1813f0b702 cnphoon 2014-02-21 92 sprintf(temp, "%u\n", fifo_buf[i]); 326c1813f0b702 cnphoon 2014-02-21 93 strcat(buf, temp); 326c1813f0b702 cnphoon 2014-02-21 94 } 326c1813f0b702 cnphoon 2014-02-21 95 326c1813f0b702 cnphoon 2014-02-21 96 strcat(buf, "\0"); 326c1813f0b702 cnphoon 2014-02-21 97 326c1813f0b702 cnphoon 2014-02-21 98 return strlen(buf); 326c1813f0b702 cnphoon 2014-02-21 99 } 326c1813f0b702 cnphoon 2014-02-21 100
:::::: The code at line 67 was first introduced by commit :::::: 326c1813f0b70239f0c06d52091461646e393bd4 FogBugz #178225: Add Altera interrupt latency counter driver
:::::: TO: cnphoon <cnphoon@altera.com> :::::: CC: Dinh Nguyen <dinh.nguyen@intel.com>
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