[ammarfaizi2-block:stable/linux-stable-rc/queue/4.19 12/15] drivers/mmc/core/mmc_ops.c:960:13: warning: variable 'timeout' set but not used
From: kernel test robot
Date: Thu May 19 2022 - 13:24:03 EST
tree: https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/4.19
head: 735c11789c15fd96455c15316570d55569afada4
commit: 200a3e31fe3e70a6b3c3ab587be7ae82c238ad6a [12/15] mmc: core: Specify timeouts for BKOPS and CACHE_FLUSH for eMMC
config: microblaze-buildonly-randconfig-r001-20220519 (https://download.01.org/0day-ci/archive/20220520/202205200128.tZ7qf9BZ-lkp@xxxxxxxxx/config)
compiler: microblaze-linux-gcc (GCC) 11.3.0
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://github.com/ammarfaizi2/linux-block/commit/200a3e31fe3e70a6b3c3ab587be7ae82c238ad6a
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block stable/linux-stable-rc/queue/4.19
git checkout 200a3e31fe3e70a6b3c3ab587be7ae82c238ad6a
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=microblaze SHELL=/bin/bash drivers/mmc/core/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
drivers/mmc/core/mmc_ops.c: In function 'mmc_start_bkops':
>> drivers/mmc/core/mmc_ops.c:960:13: warning: variable 'timeout' set but not used [-Wunused-but-set-variable]
960 | int timeout;
| ^~~~~~~
vim +/timeout +960 drivers/mmc/core/mmc_ops.c
1cf8f7e5af3910 Ulf Hansson 2017-06-09 946
1cf8f7e5af3910 Ulf Hansson 2017-06-09 947 /**
1cf8f7e5af3910 Ulf Hansson 2017-06-09 948 * mmc_start_bkops - start BKOPS for supported cards
1cf8f7e5af3910 Ulf Hansson 2017-06-09 949 * @card: MMC card to start BKOPS
e5d0e17bb6022d Shawn Lin 2017-07-04 950 * @from_exception: A flag to indicate if this function was
1cf8f7e5af3910 Ulf Hansson 2017-06-09 951 * called due to an exception raised by the card
1cf8f7e5af3910 Ulf Hansson 2017-06-09 952 *
1cf8f7e5af3910 Ulf Hansson 2017-06-09 953 * Start background operations whenever requested.
1cf8f7e5af3910 Ulf Hansson 2017-06-09 954 * When the urgent BKOPS bit is set in a R1 command response
1cf8f7e5af3910 Ulf Hansson 2017-06-09 955 * then background operations should be started immediately.
1cf8f7e5af3910 Ulf Hansson 2017-06-09 956 */
1cf8f7e5af3910 Ulf Hansson 2017-06-09 957 void mmc_start_bkops(struct mmc_card *card, bool from_exception)
1cf8f7e5af3910 Ulf Hansson 2017-06-09 958 {
1cf8f7e5af3910 Ulf Hansson 2017-06-09 959 int err;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 @960 int timeout;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 961 bool use_busy_signal;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 962
1cf8f7e5af3910 Ulf Hansson 2017-06-09 963 if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card))
1cf8f7e5af3910 Ulf Hansson 2017-06-09 964 return;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 965
1cf8f7e5af3910 Ulf Hansson 2017-06-09 966 err = mmc_read_bkops_status(card);
1cf8f7e5af3910 Ulf Hansson 2017-06-09 967 if (err) {
1cf8f7e5af3910 Ulf Hansson 2017-06-09 968 pr_err("%s: Failed to read bkops status: %d\n",
1cf8f7e5af3910 Ulf Hansson 2017-06-09 969 mmc_hostname(card->host), err);
1cf8f7e5af3910 Ulf Hansson 2017-06-09 970 return;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 971 }
1cf8f7e5af3910 Ulf Hansson 2017-06-09 972
1cf8f7e5af3910 Ulf Hansson 2017-06-09 973 if (!card->ext_csd.raw_bkops_status)
1cf8f7e5af3910 Ulf Hansson 2017-06-09 974 return;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 975
1cf8f7e5af3910 Ulf Hansson 2017-06-09 976 if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 &&
1cf8f7e5af3910 Ulf Hansson 2017-06-09 977 from_exception)
1cf8f7e5af3910 Ulf Hansson 2017-06-09 978 return;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 979
1cf8f7e5af3910 Ulf Hansson 2017-06-09 980 if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) {
1cf8f7e5af3910 Ulf Hansson 2017-06-09 981 timeout = MMC_OPS_TIMEOUT_MS;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 982 use_busy_signal = true;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 983 } else {
1cf8f7e5af3910 Ulf Hansson 2017-06-09 984 timeout = 0;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 985 use_busy_signal = false;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 986 }
1cf8f7e5af3910 Ulf Hansson 2017-06-09 987
1cf8f7e5af3910 Ulf Hansson 2017-06-09 988 mmc_retune_hold(card->host);
1cf8f7e5af3910 Ulf Hansson 2017-06-09 989
1cf8f7e5af3910 Ulf Hansson 2017-06-09 990 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
200a3e31fe3e70 Ulf Hansson 2022-05-17 991 EXT_CSD_BKOPS_START, 1, MMC_BKOPS_TIMEOUT_MS, 0,
1cf8f7e5af3910 Ulf Hansson 2017-06-09 992 use_busy_signal, true, false);
1cf8f7e5af3910 Ulf Hansson 2017-06-09 993 if (err) {
1cf8f7e5af3910 Ulf Hansson 2017-06-09 994 pr_warn("%s: Error %d starting bkops\n",
1cf8f7e5af3910 Ulf Hansson 2017-06-09 995 mmc_hostname(card->host), err);
1cf8f7e5af3910 Ulf Hansson 2017-06-09 996 mmc_retune_release(card->host);
9ca28c5cd967e0 Adrian Hunter 2017-09-22 997 return;
1cf8f7e5af3910 Ulf Hansson 2017-06-09 998 }
1cf8f7e5af3910 Ulf Hansson 2017-06-09 999
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1000 /*
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1001 * For urgent bkops status (LEVEL_2 and more)
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1002 * bkops executed synchronously, otherwise
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1003 * the operation is in progress
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1004 */
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1005 if (!use_busy_signal)
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1006 mmc_card_set_doing_bkops(card);
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1007 else
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1008 mmc_retune_release(card->host);
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1009 }
cb39f61e9b1e67 Adrian Hunter 2017-09-22 1010 EXPORT_SYMBOL(mmc_start_bkops);
1cf8f7e5af3910 Ulf Hansson 2017-06-09 1011
:::::: The code at line 960 was first introduced by commit
:::::: 1cf8f7e5af3910781a21b84f13a34851aa228fe3 mmc: core: Move mmc bkops functions from core.c to mmc_ops.c
:::::: TO: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
:::::: CC: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
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