From a27747a207887420106aca284c0e98ba5e547d78 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Wed, 18 Dec 2019 16:47:06 -0800 Subject: [PATCH] scsi: qla2xxx: Improve readability of the code that handles qla_flt_header Declare qla_hw_data.flt as a qla_flt_header pointer instead of as a void pointer. Add a zero-length array at the end of struct qla_flt_header to make it clear that qla_flt_header and qla_flt_region are contiguous. This patch removes several casts but does not change any functionality. Cc: Himanshu Madhani Cc: Quinn Tran Cc: Martin Wilck Cc: Daniel Wagner Cc: Roman Bolshakov Link: https://lore.kernel.org/r/20191219004706.39039-1-bvanassche@acm.org Reviewed-by: Daniel Wagner Signed-off-by: Bart Van Assche Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_def.h | 2 +- drivers/scsi/qla2xxx/qla_fw.h | 15 ++++++++------- drivers/scsi/qla2xxx/qla_os.c | 2 ++ drivers/scsi/qla2xxx/qla_sup.c | 11 ++++------- 4 files changed, 15 insertions(+), 15 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 90dae8f2d080..ed32e9715794 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -3968,7 +3968,7 @@ struct qla_hw_data { void *sfp_data; dma_addr_t sfp_data_dma; - void *flt; + struct qla_flt_header *flt; dma_addr_t flt_dma; #define XGMAC_DATA_SIZE 4096 diff --git a/drivers/scsi/qla2xxx/qla_fw.h b/drivers/scsi/qla2xxx/qla_fw.h index df5fff819bd7..d641918cdd46 100644 --- a/drivers/scsi/qla2xxx/qla_fw.h +++ b/drivers/scsi/qla2xxx/qla_fw.h @@ -1471,13 +1471,6 @@ struct qla_flt_location { uint16_t checksum; }; -struct qla_flt_header { - uint16_t version; - uint16_t length; - uint16_t checksum; - uint16_t unused; -}; - #define FLT_REG_FW 0x01 #define FLT_REG_BOOT_CODE 0x07 #define FLT_REG_VPD_0 0x14 @@ -1538,6 +1531,14 @@ struct qla_flt_region { uint32_t end; }; +struct qla_flt_header { + uint16_t version; + uint16_t length; + uint16_t checksum; + uint16_t unused; + struct qla_flt_region region[0]; +}; + #define FLT_REGION_SIZE 16 #define FLT_MAX_REGIONS 0xFF #define FLT_REGIONS_SIZE (FLT_REGION_SIZE * FLT_MAX_REGIONS) diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index ec1637e09f94..b520a980d1dc 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -7242,6 +7242,8 @@ qla2x00_module_init(void) BUILD_BUG_ON(sizeof(struct sns_cmd_pkt) != 2064); BUILD_BUG_ON(sizeof(struct verify_chip_entry_84xx) != 64); BUILD_BUG_ON(sizeof(struct vf_evfp_entry_24xx) != 56); + BUILD_BUG_ON(sizeof(struct qla_flt_region) != 16); + BUILD_BUG_ON(sizeof(struct qla_flt_header) != 8); /* Allocate cache for SRBs. */ srb_cachep = kmem_cache_create("qla2xxx_srbs", sizeof(srb_t), 0, diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c index bbe90354f49b..76a38bf86cbc 100644 --- a/drivers/scsi/qla2xxx/qla_sup.c +++ b/drivers/scsi/qla2xxx/qla_sup.c @@ -669,8 +669,8 @@ qla2xxx_get_flt_info(scsi_qla_host_t *vha, uint32_t flt_addr) struct qla_hw_data *ha = vha->hw; uint32_t def = IS_QLA81XX(ha) ? 2 : IS_QLA25XX(ha) ? 1 : 0; - struct qla_flt_header *flt = (void *)ha->flt; - struct qla_flt_region *region = (void *)&flt[1]; + struct qla_flt_header *flt = ha->flt; + struct qla_flt_region *region = &flt->region[0]; uint16_t *wptr, cnt, chksum; uint32_t start; @@ -2652,18 +2652,15 @@ qla28xx_get_flash_region(struct scsi_qla_host *vha, uint32_t start, struct qla_flt_region *region) { struct qla_hw_data *ha = vha->hw; - struct qla_flt_header *flt; - struct qla_flt_region *flt_reg; + struct qla_flt_header *flt = ha->flt; + struct qla_flt_region *flt_reg = &flt->region[0]; uint16_t cnt; int rval = QLA_FUNCTION_FAILED; if (!ha->flt) return QLA_FUNCTION_FAILED; - flt = (struct qla_flt_header *)ha->flt; - flt_reg = (struct qla_flt_region *)&flt[1]; cnt = le16_to_cpu(flt->length) / sizeof(struct qla_flt_region); - for (; cnt; cnt--, flt_reg++) { if (flt_reg->start == start) { memcpy((uint8_t *)region, flt_reg,