[PATCH 00/42] Fix coccicheck warnings

[PATCH 00/42] Fix coccicheck warnings

[Li Zhijian]

make coccicheck COCCI=$PWD/scripts/coccinelle/api/device_attr_show.cocci`
complians some warnnings as following[1]:

Not sure if someone had tried these fixes, feel free to ignore this
patch set if we have come to a *NOT-FIX* conclusion before :)

This patch set also fix a few snprintf() beside coccicheck reported.
For example, some thing like
xxx_show() {
	rc = snprintf();
...
	return rc;
}

TODOs:
1. Fix other abused cases that coccicheck has not detected. For
example,  ./drivers/scsi/scsi_transport_fc.c has other places using
snprint inside the macro.
2. Improve device_attr_show.cocci to detect sprintf() and fix them

[1]
$ make coccicheck COCCI=$PWD/scripts/coccinelle/api/device_attr_show.cocci
...
./arch/arm/mm/cache-l2x0-pmu.c:346:8-16: WARNING: use scnprintf or sprintf
./arch/x86/events/amd/core.c:1282:8-16: WARNING: use scnprintf or sprintf
./arch/x86/events/core.c:1895:11-19: WARNING: use scnprintf or sprintf
./arch/x86/events/core.c:2542:8-16: WARNING: use scnprintf or sprintf
./arch/x86/events/core.c:2600:8-16: WARNING: use scnprintf or sprintf
./arch/x86/events/intel/core.c:5496:8-16: WARNING: use scnprintf or sprintf
./arch/x86/events/intel/core.c:5530:8-16: WARNING: use scnprintf or sprintf
./arch/x86/events/intel/core.c:5546:8-16: WARNING: use scnprintf or sprintf
./arch/x86/events/intel/pt.c:99:8-16: WARNING: use scnprintf or sprintf
./drivers/bus/fsl-mc/fsl-mc-bus.c:205:8-16: WARNING: use scnprintf or sprintf
./drivers/edac/edac_mc_sysfs.c:210:8-16: WARNING: use scnprintf or sprintf
./drivers/edac/edac_mc_sysfs.c:518:8-16: WARNING: use scnprintf or sprintf
./drivers/fsi/fsi-master-ast-cf.c:1086:8-16: WARNING: use scnprintf or sprintf
./drivers/fsi/fsi-master-gpio.c:721:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:558:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:602:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:792:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:822:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:852:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:882:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:912:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-lenovo.c:941:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-picolcd_core.c:259:9-17: WARNING: use scnprintf or sprintf
./drivers/hid/hid-picolcd_core.c:304:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-isku.c:64:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kone.c:403:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kone.c:412:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kone.c:435:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kone.c:444:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kone.c:454:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kone.c:556:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-koneplus.c:245:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-koneplus.c:312:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kovaplus.c:275:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kovaplus.c:328:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kovaplus.c:337:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kovaplus.c:347:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-kovaplus.c:368:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-pyra.c:286:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-pyra.c:303:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-roccat-pyra.c:324:8-16: WARNING: use scnprintf or sprintf
./drivers/hid/hid-sensor-custom.c:375:10-18: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3100:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3116:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3132:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3145:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3159:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3173:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3186:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3198:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3211:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3224:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3237:8-16: WARNING: use scnprintf or sprintf
./drivers/message/fusion/mptscsih.c:3250:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:211:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:222:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:233:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:244:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:254:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:263:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:272:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:282:9-17: WARNING: use scnprintf or sprintf
./drivers/most/core.c:297:10-18: WARNING: use scnprintf or sprintf
./drivers/most/core.c:309:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:318:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:326:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:398:8-16: WARNING: use scnprintf or sprintf
./drivers/most/core.c:409:9-17: WARNING: use scnprintf or sprintf
./drivers/platform/mellanox/mlxbf-bootctl.c:466:8-16: WARNING: use scnprintf or sprintf
./drivers/platform/mellanox/mlxbf-bootctl.c:584:8-16: WARNING: use scnprintf or sprintf
./drivers/platform/mellanox/mlxbf-bootctl.c:635:8-16: WARNING: use scnprintf or sprintf
./drivers/platform/mellanox/mlxbf-bootctl.c:686:8-16: WARNING: use scnprintf or sprintf
./drivers/platform/mellanox/mlxbf-bootctl.c:737:8-16: WARNING: use scnprintf or sprintf
./drivers/platform/mellanox/mlxbf-bootctl.c:788:8-16: WARNING: use scnprintf or sprintf
./drivers/platform/mellanox/mlxbf-bootctl.c:839:8-16: WARNING: use scnprintf or sprintf
./drivers/ptp/ptp_sysfs.c:27:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/53c700.c:2074:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/aacraid/linit.c:1299:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/aacraid/linit.c:1325:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/aacraid/linit.c:1332:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/aacraid/linit.c:561:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/aacraid/linit.c:588:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/aic94xx/aic94xx_init.c:267:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/aic94xx/aic94xx_init.c:276:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/aic94xx/aic94xx_init.c:284:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/aic94xx/aic94xx_init.c:455:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:261:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:273:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:285:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:297:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:309:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:322:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:335:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:348:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:361:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/arcmsr/arcmsr_attr.c:374:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/be2iscsi/be_mgmt.c:1145:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/be2iscsi/be_mgmt.c:1164:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/be2iscsi/be_mgmt.c:1251:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/be2iscsi/be_mgmt.c:1280:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/fcoe/fcoe_sysfs.c:253:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/fcoe/fcoe_sysfs.c:268:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/fcoe/fcoe_sysfs.c:376:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/fnic/fnic_attrs.c:17:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/fnic/fnic_attrs.c:23:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/fnic/fnic_attrs.c:31:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:528:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:538:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:549:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:561:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:645:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:724:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:746:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:775:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:799:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:898:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hpsa.c:908:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hptiop.c:1114:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/hptiop.c:1123:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi/ibmvfc.c:3483:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi/ibmvfc.c:3493:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi/ibmvfc.c:3503:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi/ibmvfc.c:3513:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi/ibmvfc.c:3522:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi/ibmvfc.c:3530:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c:3619:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c:3625:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c:3633:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/isci/init.c:140:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/megaraid/megaraid_sas_base.c:3336:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/megaraid/megaraid_sas_base.c:3382:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/megaraid/megaraid_sas_base.c:3389:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/megaraid/megaraid_sas_base.c:3399:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/megaraid/megaraid_sas_base.c:3409:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/megaraid/megaraid_sas_base.c:3419:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/megaraid/megaraid_sas_base.c:3473:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:2825:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:2850:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:2873:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:2893:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:2912:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:2932:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:2952:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:2971:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:2990:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3012:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3034:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3055:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3077:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3097:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3133:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3170:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3198:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3320:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3407:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3828:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3848:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:3996:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:4018:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/mpt3sas/mpt3sas_ctl.c:4056:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrb.c:1770:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/myrb.c:1889:10-18: WARNING: use scnprintf or sprintf
./drivers/scsi/myrb.c:1906:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/myrb.c:2143:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrb.c:2153:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrb.c:2163:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1061:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1089:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1193:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1306:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1316:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1391:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1401:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1411:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1421:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:1491:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/myrs.c:942:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/ncr53c8xx.c:8034:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/pcmcia/sym53c500_cs.c:627:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/pm8001/pm8001_ctl.c:883:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/pmcraid.c:3541:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/pmcraid.c:3602:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/pmcraid.c:3635:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:159:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:173:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:181:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:190:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:200:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:210:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:223:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:235:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:247:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:256:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:264:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:273:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:281:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:303:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/qla4xxx/ql4_attr.c:312:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:1112:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:1202:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:231:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:277:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:327:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:385:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:402:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:680:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:689:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:701:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:722:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:858:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:873:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:953:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_sysfs.c:979:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_fc.c:1123:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_fc.c:1218:10-18: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_fc.c:1286:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_fc.c:1304:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_fc.c:1665:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_fc.c:1891:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_fc.c:1915:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_fc.c:1967:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_fc.c:2000:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_sas.c:1180:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_sas.c:525:9-17: WARNING: use scnprintf or sprintf
./drivers/scsi/scsi_transport_sas.c:572:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/snic/snic_attrs.c:16:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/snic/snic_attrs.c:26:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/snic/snic_attrs.c:35:8-16: WARNING: use scnprintf or sprintf
./drivers/scsi/snic/snic_attrs.c:48:8-16: WARNING: use scnprintf or sprintf
./drivers/video/fbdev/uvesafb.c:1549:8-16: WARNING: use scnprintf or sprintf
./kernel/cpu.c:3013:8-16: WARNING: use scnprintf or sprintf
./kernel/cpu.c:3026:8-16: WARNING: use scnprintf or sprintf

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CC: x86@kernel.org 

Li Zhijian (42):
  coccinelle: device_attr_show.cocci: update description and warning
    message
  arch/arm/mm: Convert snprintf to sysfs_emit
  arch/x86/events/amd: Convert snprintf to sysfs_emit
  arch/x86/events/core: Convert snprintf to sysfs_emit
  arch/x86/events/intel: Convert snprintf to sysfs_emit
  drivers/bus/fsl-mc: Convert snprintf to sysfs_emit
  drivers/edac: Convert snprintf to sysfs_emit
  drivers/fsi: Convert snprintf to sysfs_emit
  drivers/hid/hid-lenovo: Convert snprintf to sysfs_emit
  drivers/hid/hid-roccat-*: Convert snprintf to sysfs_emit
  drivers/hid: Convert snprintf to sysfs_emit
  drivers/message/fusion: Convert snprintf to sysfs_emit
  drivers/most: Convert snprintf to sysfs_emit
  drivers/platform/mellanox: Convert snprintf to sysfs_emit
  drivers/ptp: Convert snprintf to sysfs_emit
  drivers/scsi/53c700: Convert snprintf to sysfs_emit
  drivers/scsi/aacraid: Convert snprintf to sysfs_emit
  drivers/scsi/aic94xx: Convert snprintf to sysfs_emit
  drivers/scsi/arcmsr: Convert snprintf to sysfs_emit
  drivers/scsi/be2iscsi: Convert snprintf to sysfs_emit
  drivers/scsi/fcoe: Convert snprintf to sysfs_emit
  drivers/scsi/fnic: Convert snprintf to sysfs_emit
  drivers/scsi/hpsa: Convert snprintf to sysfs_emit
  drivers/scsi/hptiop: Convert snprintf to sysfs_emit
  drivers/scsi/ibmvscsi: Convert snprintf to sysfs_emit
  drivers/scsi/ibmvscsi_tgt: Convert snprintf to sysfs_emit
  drivers/scsi/isci: Convert snprintf to sysfs_emit
  drivers/scsi/megaraid: Convert snprintf to sysfs_emit
  drivers/scsi/mpt3sas: Convert snprintf to sysfs_emit
  drivers/scsi/myrb: Convert snprintf to sysfs_emit
  drivers/scsi/myrs: Convert snprintf to sysfs_emit
  drivers/scsi/ncr53c8xx: Convert snprintf to sysfs_emit
  drivers/scsi/pcmcia/sym53c500_cs: Convert snprintf to sysfs_emit
  drivers/scsi/pm8001: Convert snprintf to sysfs_emit
  drivers/scsi/pmcraid: Convert snprintf to sysfs_emit
  drivers/scsi/qla4xxx/ql4_attr: Convert snprintf to sysfs_emit
  drivers/scsi/scsi_sysfs: Convert snprintf to sysfs_emit
  drivers/scsi/scsi_transport_fc: Convert snprintf to sysfs_emit
  drivers/scsi/scsi_transport_sas: Convert snprintf to sysfs_emit
  drivers/scsi/snic/snic_attrs: Convert snprintf to sysfs_emit
  drivers/video/fbdev/uvesafb: Convert snprintf to sysfs_emit
  kernel/cpu: Convert snprintf to sysfs_emit

 arch/arm/mm/cache-l2x0-pmu.c                  |  2 +-
 arch/x86/events/amd/core.c                    |  2 +-
 arch/x86/events/core.c                        |  6 +-
 arch/x86/events/intel/core.c                  |  6 +-
 arch/x86/events/intel/pt.c                    |  2 +-
 drivers/bus/fsl-mc/fsl-mc-bus.c               |  2 +-
 drivers/edac/edac_mc_sysfs.c                  |  5 +-
 drivers/fsi/fsi-master-ast-cf.c               |  3 +-
 drivers/fsi/fsi-master-gpio.c                 |  3 +-
 drivers/hid/hid-lenovo.c                      | 19 +++---
 drivers/hid/hid-picolcd_core.c                |  6 +-
 drivers/hid/hid-roccat-isku.c                 |  2 +-
 drivers/hid/hid-roccat-kone.c                 | 12 ++--
 drivers/hid/hid-roccat-koneplus.c             |  4 +-
 drivers/hid/hid-roccat-kovaplus.c             | 10 +--
 drivers/hid/hid-roccat-pyra.c                 |  6 +-
 drivers/hid/hid-sensor-custom.c               |  3 +-
 drivers/message/fusion/mptscsih.c             | 25 ++++----
 drivers/most/core.c                           | 61 +++++++++----------
 drivers/platform/mellanox/mlxbf-bootctl.c     | 14 ++---
 drivers/ptp/ptp_sysfs.c                       |  3 +-
 drivers/scsi/53c700.c                         |  2 +-
 drivers/scsi/aacraid/linit.c                  | 17 +++---
 drivers/scsi/aic94xx/aic94xx_init.c           | 15 +++--
 drivers/scsi/arcmsr/arcmsr_attr.c             | 40 +++---------
 drivers/scsi/be2iscsi/be_mgmt.c               | 20 +++---
 drivers/scsi/fcoe/fcoe_sysfs.c                |  8 +--
 drivers/scsi/fnic/fnic_attrs.c                |  7 +--
 drivers/scsi/hpsa.c                           | 36 +++++------
 drivers/scsi/hptiop.c                         |  4 +-
 drivers/scsi/ibmvscsi/ibmvfc.c                | 22 +++----
 drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c      |  6 +-
 drivers/scsi/isci/init.c                      |  2 +-
 drivers/scsi/megaraid/megaraid_sas_base.c     | 15 +++--
 drivers/scsi/mpt3sas/mpt3sas_ctl.c            | 60 +++++++++---------
 drivers/scsi/myrb.c                           | 38 ++++++------
 drivers/scsi/myrs.c                           | 56 ++++++++---------
 drivers/scsi/ncr53c8xx.c                      |  2 +-
 drivers/scsi/pcmcia/sym53c500_cs.c            |  2 +-
 drivers/scsi/pm8001/pm8001_ctl.c              |  6 +-
 drivers/scsi/pmcraid.c                        | 11 ++--
 drivers/scsi/qla4xxx/ql4_attr.c               | 48 +++++++--------
 drivers/scsi/scsi_sysfs.c                     | 34 +++++------
 drivers/scsi/scsi_transport_fc.c              | 34 +++++------
 drivers/scsi/scsi_transport_sas.c             | 22 +++----
 drivers/scsi/snic/snic_attrs.c                | 10 +--
 drivers/video/fbdev/uvesafb.c                 |  2 +-
 kernel/cpu.c                                  |  4 +-
 scripts/coccinelle/api/device_attr_show.cocci | 10 ++-
 49 files changed, 343 insertions(+), 386 deletions(-)

-- 
2.29.2

[PATCH 09/42] drivers/hid/hid-lenovo: Convert snprintf to sysfs_emit

[Li Zhijian]

Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

> ./drivers/hid/hid-lenovo.c:558:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-lenovo.c:602:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-lenovo.c:792:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-lenovo.c:822:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-lenovo.c:852:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-lenovo.c:882:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-lenovo.c:912:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-lenovo.c:941:8-16: WARNING: please use sysfs_emit

No functional change intended

CC: Jiri Kosina <jikos@kernel.org>
CC: Benjamin Tissoires <benjamin.tissoires@redhat.com>
CC: linux-input@vger.kernel.org
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
 drivers/hid/hid-lenovo.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index 149a3c74346b..26768c319361 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -555,7 +555,7 @@ static ssize_t attr_fn_lock_show(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data->fn_lock);
+	return sysfs_emit(buf, "%u\n", data->fn_lock);
 }
 
 static ssize_t attr_fn_lock_store(struct device *dev,
@@ -599,8 +599,7 @@ static ssize_t attr_sensitivity_show_cptkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *cptkbd_data = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
-		cptkbd_data->sensitivity);
+	return sysfs_emit(buf, "%u\n", cptkbd_data->sensitivity);
 }
 
 static ssize_t attr_sensitivity_store_cptkbd(struct device *dev,
@@ -789,7 +788,7 @@ static ssize_t attr_press_to_select_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->press_to_select);
+	return sysfs_emit(buf, "%u\n", data_pointer->press_to_select);
 }
 
 static ssize_t attr_press_to_select_store_tpkbd(struct device *dev,
@@ -819,7 +818,7 @@ static ssize_t attr_dragging_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->dragging);
+	return sysfs_emit(buf, "%u\n", data_pointer->dragging);
 }
 
 static ssize_t attr_dragging_store_tpkbd(struct device *dev,
@@ -849,7 +848,7 @@ static ssize_t attr_release_to_select_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->release_to_select);
+	return sysfs_emit(buf, "%u\n", data_pointer->release_to_select);
 }
 
 static ssize_t attr_release_to_select_store_tpkbd(struct device *dev,
@@ -879,7 +878,7 @@ static ssize_t attr_select_right_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->select_right);
+	return sysfs_emit(buf, "%u\n", data_pointer->select_right);
 }
 
 static ssize_t attr_select_right_store_tpkbd(struct device *dev,
@@ -909,8 +908,7 @@ static ssize_t attr_sensitivity_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
-		data_pointer->sensitivity);
+	return sysfs_emit(buf, "%u\n", data_pointer->sensitivity);
 }
 
 static ssize_t attr_sensitivity_store_tpkbd(struct device *dev,
@@ -938,8 +936,7 @@ static ssize_t attr_press_speed_show_tpkbd(struct device *dev,
 	struct hid_device *hdev = to_hid_device(dev);
 	struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n",
-		data_pointer->press_speed);
+	return sysfs_emit(buf, "%u\n", data_pointer->press_speed);
 }
 
 static ssize_t attr_press_speed_store_tpkbd(struct device *dev,
-- 
2.29.2

[PATCH 10/42] drivers/hid/hid-roccat-*: Convert snprintf to sysfs_emit

[Li Zhijian]

Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

> ./drivers/hid/hid-roccat-isku.c:64:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kone.c:403:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kone.c:412:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kone.c:435:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kone.c:444:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kone.c:454:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kone.c:556:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-koneplus.c:245:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-koneplus.c:312:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kovaplus.c:275:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kovaplus.c:328:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kovaplus.c:337:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kovaplus.c:347:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-kovaplus.c:368:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-pyra.c:286:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-pyra.c:303:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-roccat-pyra.c:324:8-16: WARNING: please use sysfs_emit

No functional change intended

CC: Stefan Achatz <erazor_de@users.sourceforge.net>
CC: Jiri Kosina <jikos@kernel.org>
CC: Benjamin Tissoires <benjamin.tissoires@redhat.com>
CC: linux-input@vger.kernel.org
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
 drivers/hid/hid-roccat-isku.c     |  2 +-
 drivers/hid/hid-roccat-kone.c     | 12 ++++++------
 drivers/hid/hid-roccat-koneplus.c |  4 ++--
 drivers/hid/hid-roccat-kovaplus.c | 10 +++++-----
 drivers/hid/hid-roccat-pyra.c     |  6 +++---
 5 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/hid/hid-roccat-isku.c b/drivers/hid/hid-roccat-isku.c
index 458060403397..0cd6208fb371 100644
--- a/drivers/hid/hid-roccat-isku.c
+++ b/drivers/hid/hid-roccat-isku.c
@@ -61,7 +61,7 @@ static ssize_t isku_sysfs_show_actual_profile(struct device *dev,
 {
 	struct isku_device *isku =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", isku->actual_profile);
+	return sysfs_emit(buf, "%d\n", isku->actual_profile);
 }
 
 static ssize_t isku_sysfs_set_actual_profile(struct device *dev,
diff --git a/drivers/hid/hid-roccat-kone.c b/drivers/hid/hid-roccat-kone.c
index 00a1abc7e839..3f8f459edcf3 100644
--- a/drivers/hid/hid-roccat-kone.c
+++ b/drivers/hid/hid-roccat-kone.c
@@ -400,7 +400,7 @@ static ssize_t kone_sysfs_show_actual_profile(struct device *dev,
 {
 	struct kone_device *kone =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", kone->actual_profile);
+	return sysfs_emit(buf, "%d\n", kone->actual_profile);
 }
 static DEVICE_ATTR(actual_profile, 0440, kone_sysfs_show_actual_profile, NULL);
 
@@ -409,7 +409,7 @@ static ssize_t kone_sysfs_show_actual_dpi(struct device *dev,
 {
 	struct kone_device *kone =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", kone->actual_dpi);
+	return sysfs_emit(buf, "%d\n", kone->actual_dpi);
 }
 static DEVICE_ATTR(actual_dpi, 0440, kone_sysfs_show_actual_dpi, NULL);
 
@@ -432,7 +432,7 @@ static ssize_t kone_sysfs_show_weight(struct device *dev,
 
 	if (retval)
 		return retval;
-	return snprintf(buf, PAGE_SIZE, "%d\n", weight);
+	return sysfs_emit(buf, "%d\n", weight);
 }
 static DEVICE_ATTR(weight, 0440, kone_sysfs_show_weight, NULL);
 
@@ -441,7 +441,7 @@ static ssize_t kone_sysfs_show_firmware_version(struct device *dev,
 {
 	struct kone_device *kone =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", kone->firmware_version);
+	return sysfs_emit(buf, "%d\n", kone->firmware_version);
 }
 static DEVICE_ATTR(firmware_version, 0440, kone_sysfs_show_firmware_version,
 		   NULL);
@@ -451,7 +451,7 @@ static ssize_t kone_sysfs_show_tcu(struct device *dev,
 {
 	struct kone_device *kone =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", kone->settings.tcu);
+	return sysfs_emit(buf, "%d\n", kone->settings.tcu);
 }
 
 static int kone_tcu_command(struct usb_device *usb_dev, int number)
@@ -553,7 +553,7 @@ static ssize_t kone_sysfs_show_startup_profile(struct device *dev,
 {
 	struct kone_device *kone =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", kone->settings.startup_profile);
+	return sysfs_emit(buf, "%d\n", kone->settings.startup_profile);
 }
 
 static ssize_t kone_sysfs_set_startup_profile(struct device *dev,
diff --git a/drivers/hid/hid-roccat-koneplus.c b/drivers/hid/hid-roccat-koneplus.c
index 22b895436a7c..8ccb3b14a1a9 100644
--- a/drivers/hid/hid-roccat-koneplus.c
+++ b/drivers/hid/hid-roccat-koneplus.c
@@ -242,7 +242,7 @@ static ssize_t koneplus_sysfs_show_actual_profile(struct device *dev,
 {
 	struct koneplus_device *koneplus =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", koneplus->actual_profile);
+	return sysfs_emit(buf, "%d\n", koneplus->actual_profile);
 }
 
 static ssize_t koneplus_sysfs_set_actual_profile(struct device *dev,
@@ -309,7 +309,7 @@ static ssize_t koneplus_sysfs_show_firmware_version(struct device *dev,
 			&info, KONEPLUS_SIZE_INFO);
 	mutex_unlock(&koneplus->koneplus_lock);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", info.firmware_version);
+	return sysfs_emit(buf, "%d\n", info.firmware_version);
 }
 static DEVICE_ATTR(firmware_version, 0440,
 		   koneplus_sysfs_show_firmware_version, NULL);
diff --git a/drivers/hid/hid-roccat-kovaplus.c b/drivers/hid/hid-roccat-kovaplus.c
index 86af538c10d6..748d4d7cb2fc 100644
--- a/drivers/hid/hid-roccat-kovaplus.c
+++ b/drivers/hid/hid-roccat-kovaplus.c
@@ -272,7 +272,7 @@ static ssize_t kovaplus_sysfs_show_actual_profile(struct device *dev,
 {
 	struct kovaplus_device *kovaplus =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_profile);
+	return sysfs_emit(buf, "%d\n", kovaplus->actual_profile);
 }
 
 static ssize_t kovaplus_sysfs_set_actual_profile(struct device *dev,
@@ -325,7 +325,7 @@ static ssize_t kovaplus_sysfs_show_actual_cpi(struct device *dev,
 {
 	struct kovaplus_device *kovaplus =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_cpi);
+	return sysfs_emit(buf, "%d\n", kovaplus->actual_cpi);
 }
 static DEVICE_ATTR(actual_cpi, 0440, kovaplus_sysfs_show_actual_cpi, NULL);
 
@@ -334,7 +334,7 @@ static ssize_t kovaplus_sysfs_show_actual_sensitivity_x(struct device *dev,
 {
 	struct kovaplus_device *kovaplus =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_x_sensitivity);
+	return sysfs_emit(buf, "%d\n", kovaplus->actual_x_sensitivity);
 }
 static DEVICE_ATTR(actual_sensitivity_x, 0440,
 		   kovaplus_sysfs_show_actual_sensitivity_x, NULL);
@@ -344,7 +344,7 @@ static ssize_t kovaplus_sysfs_show_actual_sensitivity_y(struct device *dev,
 {
 	struct kovaplus_device *kovaplus =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", kovaplus->actual_y_sensitivity);
+	return sysfs_emit(buf, "%d\n", kovaplus->actual_y_sensitivity);
 }
 static DEVICE_ATTR(actual_sensitivity_y, 0440,
 		   kovaplus_sysfs_show_actual_sensitivity_y, NULL);
@@ -365,7 +365,7 @@ static ssize_t kovaplus_sysfs_show_firmware_version(struct device *dev,
 			&info, KOVAPLUS_SIZE_INFO);
 	mutex_unlock(&kovaplus->kovaplus_lock);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", info.firmware_version);
+	return sysfs_emit(buf, "%d\n", info.firmware_version);
 }
 static DEVICE_ATTR(firmware_version, 0440,
 		   kovaplus_sysfs_show_firmware_version, NULL);
diff --git a/drivers/hid/hid-roccat-pyra.c b/drivers/hid/hid-roccat-pyra.c
index 5663b9cd9c69..eeb3d38cd805 100644
--- a/drivers/hid/hid-roccat-pyra.c
+++ b/drivers/hid/hid-roccat-pyra.c
@@ -283,7 +283,7 @@ static ssize_t pyra_sysfs_show_actual_cpi(struct device *dev,
 {
 	struct pyra_device *pyra =
 			hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
-	return snprintf(buf, PAGE_SIZE, "%d\n", pyra->actual_cpi);
+	return sysfs_emit(buf, "%d\n", pyra->actual_cpi);
 }
 static DEVICE_ATTR(actual_cpi, 0440, pyra_sysfs_show_actual_cpi, NULL);
 
@@ -300,7 +300,7 @@ static ssize_t pyra_sysfs_show_actual_profile(struct device *dev,
 			&settings, PYRA_SIZE_SETTINGS);
 	mutex_unlock(&pyra->pyra_lock);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", settings.startup_profile);
+	return sysfs_emit(buf, "%d\n", settings.startup_profile);
 }
 static DEVICE_ATTR(actual_profile, 0440, pyra_sysfs_show_actual_profile, NULL);
 static DEVICE_ATTR(startup_profile, 0440, pyra_sysfs_show_actual_profile, NULL);
@@ -321,7 +321,7 @@ static ssize_t pyra_sysfs_show_firmware_version(struct device *dev,
 			&info, PYRA_SIZE_INFO);
 	mutex_unlock(&pyra->pyra_lock);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", info.firmware_version);
+	return sysfs_emit(buf, "%d\n", info.firmware_version);
 }
 static DEVICE_ATTR(firmware_version, 0440, pyra_sysfs_show_firmware_version,
 		   NULL);
-- 
2.29.2

[PATCH 11/42] drivers/hid: Convert snprintf to sysfs_emit

[Li Zhijian]

Per Documentation/filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

> ./drivers/hid/hid-picolcd_core.c:259:9-17: WARNING: please use sysfs_emit
> ./drivers/hid/hid-picolcd_core.c:304:8-16: WARNING: please use sysfs_emit
> ./drivers/hid/hid-sensor-custom.c:375:10-18: WARNING: please use sysfs_emi

No functional change intended

CC: "Bruno Prémont" <bonbons@linux-vserver.org>
CC: Jiri Kosina <jikos@kernel.org>
CC: Benjamin Tissoires <benjamin.tissoires@redhat.com>
CC: Jonathan Cameron <jic23@kernel.org>
CC: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
CC: linux-input@vger.kernel.org
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
 drivers/hid/hid-picolcd_core.c  | 6 +++---
 drivers/hid/hid-sensor-custom.c | 3 +--
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
index bbda231a7ce3..fa46fb6eab3f 100644
--- a/drivers/hid/hid-picolcd_core.c
+++ b/drivers/hid/hid-picolcd_core.c
@@ -256,9 +256,9 @@ static ssize_t picolcd_operation_mode_show(struct device *dev,
 	struct picolcd_data *data = dev_get_drvdata(dev);
 
 	if (data->status & PICOLCD_BOOTLOADER)
-		return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n");
+		return sysfs_emit(buf, "[bootloader] lcd\n");
 	else
-		return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n");
+		return sysfs_emit(buf, "bootloader [lcd]\n");
 }
 
 static ssize_t picolcd_operation_mode_store(struct device *dev,
@@ -301,7 +301,7 @@ static ssize_t picolcd_operation_mode_delay_show(struct device *dev,
 {
 	struct picolcd_data *data = dev_get_drvdata(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay);
+	return sysfs_emit(buf, "%hu\n", data->opmode_delay);
 }
 
 static ssize_t picolcd_operation_mode_delay_store(struct device *dev,
diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c
index d85398721659..4fe8dccf671d 100644
--- a/drivers/hid/hid-sensor-custom.c
+++ b/drivers/hid/hid-sensor-custom.c
@@ -372,8 +372,7 @@ static ssize_t show_value(struct device *dev, struct device_attribute *attr,
 				     sizeof(struct hid_custom_usage_desc),
 				     usage_id_cmp);
 		if (usage_desc)
-			return snprintf(buf, PAGE_SIZE, "%s\n",
-					usage_desc->desc);
+			return sysfs_emit(buf, "%s\n", usage_desc->desc);
 		else
 			return sprintf(buf, "not-specified\n");
 	 } else
-- 
2.29.2

Re: (subset) [PATCH 00/42] Fix coccicheck warnings

[Martin K. Petersen]

On Tue, 16 Jan 2024 12:10:47 +0800, Li Zhijian wrote:

> make coccicheck COCCI=$PWD/scripts/coccinelle/api/device_attr_show.cocci`
> complians some warnnings as following[1]:
> 
> Not sure if someone had tried these fixes, feel free to ignore this
> patch set if we have come to a *NOT-FIX* conclusion before :)
> 
> This patch set also fix a few snprintf() beside coccicheck reported.
> For example, some thing like
> xxx_show() {
> 	rc = snprintf();
> ...
> 	return rc;
> }
> 
> [...]

Applied to 6.9/scsi-queue, thanks!

[22/42] drivers/scsi/fnic: Convert snprintf to sysfs_emit
        https://git.kernel.org/mkp/scsi/c/1ad717c92925
[25/42] drivers/scsi/ibmvscsi: Convert snprintf to sysfs_emit
        https://git.kernel.org/mkp/scsi/c/29ff822f466e
[26/42] drivers/scsi/ibmvscsi_tgt: Convert snprintf to sysfs_emit
        https://git.kernel.org/mkp/scsi/c/01105c23de42
[27/42] drivers/scsi/isci: Convert snprintf to sysfs_emit
        https://git.kernel.org/mkp/scsi/c/5fbf37e53091
[34/42] drivers/scsi/pm8001: Convert snprintf to sysfs_emit
        https://git.kernel.org/mkp/scsi/c/8179041f801d

-- 
Martin K. Petersen	Oracle Linux Engineering

Re: [PATCH 11/42] drivers/hid: Convert snprintf to sysfs_emit

[Bruno Prémont]

Hi Li,

While only looking for the snprintf() in your coccinelle analysis you
probably also want to look for sprintf() (see e.g. else clause in
hid-sensor-custom.c and scnprintf() (see picolcd_fb_update_rate_show
in hid-picolcd_fb.c) to replace more s*printf() calls with sysfs_emit*
variants.



diff --git a/drivers/hid/hid-picolcd_fb.c b/drivers/hid/hid-picolcd_fb.c
index d726aaafb146..03074d25d662 100644
--- a/drivers/hid/hid-picolcd_fb.c
+++ b/drivers/hid/hid-picolcd_fb.c
@@ -459,9 +459,9 @@ static ssize_t picolcd_fb_update_rate_show(struct device *dev,
 		if (ret >= PAGE_SIZE)
 			break;
 		else if (i == fb_update_rate)
-			ret += scnprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i);
+			ret += sysfs_emit_at(buf, ret, "[%u] ", i);
 		else
-			ret += scnprintf(buf+ret, PAGE_SIZE-ret, "%u ", i);
+			ret += sysfs_emit_at(buf, ret, "%u ", i);
 	if (ret > 0)
 		buf[min(ret, (size_t)PAGE_SIZE)-1] = '\n';
 	return ret;


For hid-picolcd-*.c,
  Acked-by: Bruno Prémont <bonbons@linux-vserver.org>
but preferably with the scnprintf() case is covered too.


Cheers,
Bruno

On Tue, 16 Jan 2024 12:51:20 +0800 Li Zhijian wrote:
> Per Documentation/filesystems/sysfs.rst, show() should only use sysfs_emit()
> or sysfs_emit_at() when formatting the value to be returned to user space.
> 
> coccinelle complains that there are still a couple of functions that use
> snprintf(). Convert them to sysfs_emit().
> 
> > ./drivers/hid/hid-picolcd_core.c:259:9-17: WARNING: please use sysfs_emit
> > ./drivers/hid/hid-picolcd_core.c:304:8-16: WARNING: please use sysfs_emit
> > ./drivers/hid/hid-sensor-custom.c:375:10-18: WARNING: please use sysfs_emi  
> 
> No functional change intended
> 
> CC: "Bruno Prémont" <bonbons@linux-vserver.org>
> CC: Jiri Kosina <jikos@kernel.org>
> CC: Benjamin Tissoires <benjamin.tissoires@redhat.com>
> CC: Jonathan Cameron <jic23@kernel.org>
> CC: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
> CC: linux-input@vger.kernel.org
> Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
> ---
>  drivers/hid/hid-picolcd_core.c  | 6 +++---
>  drivers/hid/hid-sensor-custom.c | 3 +--
>  2 files changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
> index bbda231a7ce3..fa46fb6eab3f 100644
> --- a/drivers/hid/hid-picolcd_core.c
> +++ b/drivers/hid/hid-picolcd_core.c
> @@ -256,9 +256,9 @@ static ssize_t picolcd_operation_mode_show(struct device *dev,
>  	struct picolcd_data *data = dev_get_drvdata(dev);
>  
>  	if (data->status & PICOLCD_BOOTLOADER)
> -		return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n");
> +		return sysfs_emit(buf, "[bootloader] lcd\n");
>  	else
> -		return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n");
> +		return sysfs_emit(buf, "bootloader [lcd]\n");
>  }
>  
>  static ssize_t picolcd_operation_mode_store(struct device *dev,
> @@ -301,7 +301,7 @@ static ssize_t picolcd_operation_mode_delay_show(struct device *dev,
>  {
>  	struct picolcd_data *data = dev_get_drvdata(dev);
>  
> -	return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay);
> +	return sysfs_emit(buf, "%hu\n", data->opmode_delay);
>  }
>  
>  static ssize_t picolcd_operation_mode_delay_store(struct device *dev,
> diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c
> index d85398721659..4fe8dccf671d 100644
> --- a/drivers/hid/hid-sensor-custom.c
> +++ b/drivers/hid/hid-sensor-custom.c
> @@ -372,8 +372,7 @@ static ssize_t show_value(struct device *dev, struct device_attribute *attr,
>  				     sizeof(struct hid_custom_usage_desc),
>  				     usage_id_cmp);
>  		if (usage_desc)
> -			return snprintf(buf, PAGE_SIZE, "%s\n",
> -					usage_desc->desc);
> +			return sysfs_emit(buf, "%s\n", usage_desc->desc);
>  		else
>  			return sprintf(buf, "not-specified\n");

Shouldn't the sprintf() in the else clause be replaced as well?

>  	 } else

Re: [PATCH 11/42] drivers/hid: Convert snprintf to sysfs_emit

[Zhijian Li (Fujitsu)]

on 2/25/2024 12:59 AM, Bruno Prémont wrote:
> Hi Li,
>
> While only looking for the snprintf() in your coccinelle analysis you
> probably also want to look for sprintf() (see e.g. else clause in
> hid-sensor-custom.c and scnprintf() (see picolcd_fb_update_rate_show
> in hid-picolcd_fb.c) to replace more s*printf() calls with sysfs_emit*
> variants.

Yeah,  previously, i intended to do the conversion for the files 
reported by coccinelle(snprintf() only),
Think more, I should consider the whole s*printf() family  for these 
files at the same time.

This will be done in V2.


Thanks
Li, Zhijian



>
>
>
> diff --git a/drivers/hid/hid-picolcd_fb.c b/drivers/hid/hid-picolcd_fb.c
> index d726aaafb146..03074d25d662 100644
> --- a/drivers/hid/hid-picolcd_fb.c
> +++ b/drivers/hid/hid-picolcd_fb.c
> @@ -459,9 +459,9 @@ static ssize_t picolcd_fb_update_rate_show(struct device *dev,
>   		if (ret >= PAGE_SIZE)
>   			break;
>   		else if (i == fb_update_rate)
> -			ret += scnprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i);
> +			ret += sysfs_emit_at(buf, ret, "[%u] ", i);
>   		else
> -			ret += scnprintf(buf+ret, PAGE_SIZE-ret, "%u ", i);
> +			ret += sysfs_emit_at(buf, ret, "%u ", i);
>   	if (ret > 0)
>   		buf[min(ret, (size_t)PAGE_SIZE)-1] = '\n';
>   	return ret;
>
>
> For hid-picolcd-*.c,
>    Acked-by: Bruno Prémont <bonbons@linux-vserver.org>
> but preferably with the scnprintf() case is covered too.
>
>
> Cheers,
> Bruno
>
> On Tue, 16 Jan 2024 12:51:20 +0800 Li Zhijian wrote:
>> Per Documentation/filesystems/sysfs.rst, show() should only use sysfs_emit()
>> or sysfs_emit_at() when formatting the value to be returned to user space.
>>
>> coccinelle complains that there are still a couple of functions that use
>> snprintf(). Convert them to sysfs_emit().
>>
>>> ./drivers/hid/hid-picolcd_core.c:259:9-17: WARNING: please use sysfs_emit
>>> ./drivers/hid/hid-picolcd_core.c:304:8-16: WARNING: please use sysfs_emit
>>> ./drivers/hid/hid-sensor-custom.c:375:10-18: WARNING: please use sysfs_emi
>> No functional change intended
>>
>> CC: "Bruno Prémont" <bonbons@linux-vserver.org>
>> CC: Jiri Kosina <jikos@kernel.org>
>> CC: Benjamin Tissoires <benjamin.tissoires@redhat.com>
>> CC: Jonathan Cameron <jic23@kernel.org>
>> CC: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
>> CC: linux-input@vger.kernel.org
>> Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
>> ---
>>   drivers/hid/hid-picolcd_core.c  | 6 +++---
>>   drivers/hid/hid-sensor-custom.c | 3 +--
>>   2 files changed, 4 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
>> index bbda231a7ce3..fa46fb6eab3f 100644
>> --- a/drivers/hid/hid-picolcd_core.c
>> +++ b/drivers/hid/hid-picolcd_core.c
>> @@ -256,9 +256,9 @@ static ssize_t picolcd_operation_mode_show(struct device *dev,
>>   	struct picolcd_data *data = dev_get_drvdata(dev);
>>   
>>   	if (data->status & PICOLCD_BOOTLOADER)
>> -		return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n");
>> +		return sysfs_emit(buf, "[bootloader] lcd\n");
>>   	else
>> -		return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n");
>> +		return sysfs_emit(buf, "bootloader [lcd]\n");
>>   }
>>   
>>   static ssize_t picolcd_operation_mode_store(struct device *dev,
>> @@ -301,7 +301,7 @@ static ssize_t picolcd_operation_mode_delay_show(struct device *dev,
>>   {
>>   	struct picolcd_data *data = dev_get_drvdata(dev);
>>   
>> -	return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay);
>> +	return sysfs_emit(buf, "%hu\n", data->opmode_delay);
>>   }
>>   
>>   static ssize_t picolcd_operation_mode_delay_store(struct device *dev,
>> diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c
>> index d85398721659..4fe8dccf671d 100644
>> --- a/drivers/hid/hid-sensor-custom.c
>> +++ b/drivers/hid/hid-sensor-custom.c
>> @@ -372,8 +372,7 @@ static ssize_t show_value(struct device *dev, struct device_attribute *attr,
>>   				     sizeof(struct hid_custom_usage_desc),
>>   				     usage_id_cmp);
>>   		if (usage_desc)
>> -			return snprintf(buf, PAGE_SIZE, "%s\n",
>> -					usage_desc->desc);
>> +			return sysfs_emit(buf, "%s\n", usage_desc->desc);
>>   		else
>>   			return sprintf(buf, "not-specified\n");
> Shouldn't the sprintf() in the else clause be replaced as well?
>
>>   	 } else