From: Bart Van Assche Date: Fri, 9 Aug 2019 03:02:12 +0000 (-0700) Subject: scsi: qla2xxx: Let the compiler check the type of the SCSI command context pointer X-Git-Tag: v5.4-rc1~89^2~137 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=5ec9f9040f61dfd0412a53fa2fc1e321727a5a61;p=linux.git scsi: qla2xxx: Let the compiler check the type of the SCSI command context pointer Split srb_cmd.ctx into two pointers such that the compiler can check the type of that pointer. Cc: Himanshu Madhani Signed-off-by: Bart Van Assche Tested-by: Himanshu Madhani Reviewed-by: Himanshu Madhani Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 3ffe7661a25b..527b2a2708a1 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -317,7 +317,8 @@ struct srb_cmd { uint32_t request_sense_length; uint32_t fw_sense_length; uint8_t *request_sense_ptr; - void *ctx; + struct ct6_dsd *ct6_ctx; + struct crc_context *crc_ctx; }; /* @@ -630,7 +631,6 @@ typedef struct srb { } srb_t; #define GET_CMD_SP(sp) (sp->u.scmd.cmd) -#define GET_CMD_CTX_SP(sp) (sp->u.scmd.ctx) #define GET_CMD_SENSE_LEN(sp) \ (sp->u.scmd.request_sense_length) diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c index 22d875222321..6acf92d19951 100644 --- a/drivers/scsi/qla2xxx/qla_iocb.c +++ b/drivers/scsi/qla2xxx/qla_iocb.c @@ -621,7 +621,7 @@ qla24xx_build_scsi_type_6_iocbs(srb_t *sp, struct cmd_type_6 *cmd_pkt, } cur_seg = scsi_sglist(cmd); - ctx = GET_CMD_CTX_SP(sp); + ctx = sp->u.scmd.ct6_ctx; while (tot_dsds) { avail_dsds = (tot_dsds > QLA_DSDS_PER_IOCB) ? @@ -954,8 +954,7 @@ qla24xx_walk_and_build_sglist_no_difb(struct qla_hw_data *ha, srb_t *sp, if (sp) { list_add_tail(&dsd_ptr->list, - &((struct crc_context *) - sp->u.scmd.ctx)->dsd_list); + &sp->u.scmd.crc_ctx->dsd_list); sp->flags |= SRB_CRC_CTX_DSD_VALID; } else { @@ -1052,8 +1051,7 @@ qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp, if (sp) { list_add_tail(&dsd_ptr->list, - &((struct crc_context *) - sp->u.scmd.ctx)->dsd_list); + &sp->u.scmd.crc_ctx->dsd_list); sp->flags |= SRB_CRC_CTX_DSD_VALID; } else { @@ -1099,7 +1097,7 @@ qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp, sgl = scsi_prot_sglist(cmd); vha = sp->vha; - difctx = sp->u.scmd.ctx; + difctx = sp->u.scmd.crc_ctx; direction_to_device = cmd->sc_data_direction == DMA_TO_DEVICE; ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021, "%s: scsi_cmnd: %p, crc_ctx: %p, sp: %p\n", @@ -1439,7 +1437,7 @@ qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt, bundling = 0; /* Allocate CRC context from global pool */ - crc_ctx_pkt = sp->u.scmd.ctx = + crc_ctx_pkt = sp->u.scmd.crc_ctx = dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma); if (!crc_ctx_pkt) @@ -3188,7 +3186,7 @@ qla82xx_start_scsi(srb_t *sp) goto queuing_error; } - ctx = sp->u.scmd.ctx = + ctx = sp->u.scmd.ct6_ctx = mempool_alloc(ha->ctx_mempool, GFP_ATOMIC); if (!ctx) { ql_log(ql_log_fatal, vha, 0x3010, @@ -3384,9 +3382,9 @@ qla82xx_start_scsi(srb_t *sp) if (tot_dsds) scsi_dma_unmap(cmd); - if (sp->u.scmd.ctx) { - mempool_free(sp->u.scmd.ctx, ha->ctx_mempool); - sp->u.scmd.ctx = NULL; + if (sp->u.scmd.crc_ctx) { + mempool_free(sp->u.scmd.crc_ctx, ha->ctx_mempool); + sp->u.scmd.crc_ctx = NULL; } spin_unlock_irqrestore(&ha->hardware_lock, flags); diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c index a91d426add75..372355bfcbb6 100644 --- a/drivers/scsi/qla2xxx/qla_nx.c +++ b/drivers/scsi/qla2xxx/qla_nx.c @@ -3686,7 +3686,7 @@ qla82xx_chip_reset_cleanup(scsi_qla_host_t *vha) for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) { sp = req->outstanding_cmds[cnt]; if (sp) { - if ((!sp->u.scmd.ctx || + if ((!sp->u.scmd.crc_ctx || (sp->flags & SRB_FCP_CMND_DMA_VALID)) && !ha->flags.isp82xx_fw_hung) { diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index 5ca7f7913258..5cb0bb65ace3 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -656,7 +656,6 @@ void qla2x00_sp_free_dma(srb_t *sp) { struct qla_hw_data *ha = sp->vha->hw; struct scsi_cmnd *cmd = GET_CMD_SP(sp); - void *ctx = GET_CMD_CTX_SP(sp); if (sp->flags & SRB_DMA_VALID) { scsi_dma_unmap(cmd); @@ -669,24 +668,21 @@ void qla2x00_sp_free_dma(srb_t *sp) sp->flags &= ~SRB_CRC_PROT_DMA_VALID; } - if (!ctx) - return; - if (sp->flags & SRB_CRC_CTX_DSD_VALID) { /* List assured to be having elements */ - qla2x00_clean_dsd_pool(ha, ctx); + qla2x00_clean_dsd_pool(ha, sp->u.scmd.crc_ctx); sp->flags &= ~SRB_CRC_CTX_DSD_VALID; } if (sp->flags & SRB_CRC_CTX_DMA_VALID) { - struct crc_context *ctx0 = ctx; + struct crc_context *ctx0 = sp->u.scmd.crc_ctx; dma_pool_free(ha->dl_dma_pool, ctx0, ctx0->crc_ctx_dma); sp->flags &= ~SRB_CRC_CTX_DMA_VALID; } if (sp->flags & SRB_FCP_CMND_DMA_VALID) { - struct ct6_dsd *ctx1 = ctx; + struct ct6_dsd *ctx1 = sp->u.scmd.ct6_ctx; dma_pool_free(ha->fcp_cmnd_dma_pool, ctx1->fcp_cmnd, ctx1->fcp_cmnd_dma); @@ -719,7 +715,6 @@ void qla2xxx_qpair_sp_free_dma(srb_t *sp) { struct scsi_cmnd *cmd = GET_CMD_SP(sp); struct qla_hw_data *ha = sp->fcport->vha->hw; - void *ctx = GET_CMD_CTX_SP(sp); if (sp->flags & SRB_DMA_VALID) { scsi_dma_unmap(cmd); @@ -732,17 +727,14 @@ void qla2xxx_qpair_sp_free_dma(srb_t *sp) sp->flags &= ~SRB_CRC_PROT_DMA_VALID; } - if (!ctx) - return; - if (sp->flags & SRB_CRC_CTX_DSD_VALID) { /* List assured to be having elements */ - qla2x00_clean_dsd_pool(ha, ctx); + qla2x00_clean_dsd_pool(ha, sp->u.scmd.crc_ctx); sp->flags &= ~SRB_CRC_CTX_DSD_VALID; } if (sp->flags & SRB_DIF_BUNDL_DMA_VALID) { - struct crc_context *difctx = ctx; + struct crc_context *difctx = sp->u.scmd.crc_ctx; struct dsd_dma *dif_dsd, *nxt_dsd; list_for_each_entry_safe(dif_dsd, nxt_dsd, @@ -778,7 +770,7 @@ void qla2xxx_qpair_sp_free_dma(srb_t *sp) } if (sp->flags & SRB_FCP_CMND_DMA_VALID) { - struct ct6_dsd *ctx1 = ctx; + struct ct6_dsd *ctx1 = sp->u.scmd.ct6_ctx; dma_pool_free(ha->fcp_cmnd_dma_pool, ctx1->fcp_cmnd, ctx1->fcp_cmnd_dma); @@ -790,9 +782,9 @@ void qla2xxx_qpair_sp_free_dma(srb_t *sp) } if (sp->flags & SRB_CRC_CTX_DMA_VALID) { - struct crc_context *ctx0 = ctx; + struct crc_context *ctx0 = sp->u.scmd.crc_ctx; - dma_pool_free(ha->dl_dma_pool, ctx, ctx0->crc_ctx_dma); + dma_pool_free(ha->dl_dma_pool, ctx0, ctx0->crc_ctx_dma); sp->flags &= ~SRB_CRC_CTX_DMA_VALID; } }