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 <hmadhani@marvell.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Tested-by: Himanshu Madhani <hmadhani@marvell.com> Reviewed-by: Himanshu Madhani <hmadhani@marvell.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -317,7 +317,8 @@ struct srb_cmd {
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uint32_t request_sense_length;
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uint32_t fw_sense_length;
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uint8_t *request_sense_ptr;
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void *ctx;
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struct ct6_dsd *ct6_ctx;
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struct crc_context *crc_ctx;
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};
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/*
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@ -630,7 +631,6 @@ typedef struct srb {
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} srb_t;
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#define GET_CMD_SP(sp) (sp->u.scmd.cmd)
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#define GET_CMD_CTX_SP(sp) (sp->u.scmd.ctx)
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#define GET_CMD_SENSE_LEN(sp) \
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(sp->u.scmd.request_sense_length)
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@ -621,7 +621,7 @@ qla24xx_build_scsi_type_6_iocbs(srb_t *sp, struct cmd_type_6 *cmd_pkt,
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}
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cur_seg = scsi_sglist(cmd);
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ctx = GET_CMD_CTX_SP(sp);
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ctx = sp->u.scmd.ct6_ctx;
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while (tot_dsds) {
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avail_dsds = (tot_dsds > QLA_DSDS_PER_IOCB) ?
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@ -954,8 +954,7 @@ alloc_and_fill:
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if (sp) {
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list_add_tail(&dsd_ptr->list,
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&((struct crc_context *)
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sp->u.scmd.ctx)->dsd_list);
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&sp->u.scmd.crc_ctx->dsd_list);
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sp->flags |= SRB_CRC_CTX_DSD_VALID;
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} else {
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@ -1052,8 +1051,7 @@ qla24xx_walk_and_build_sglist(struct qla_hw_data *ha, srb_t *sp,
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if (sp) {
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list_add_tail(&dsd_ptr->list,
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&((struct crc_context *)
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sp->u.scmd.ctx)->dsd_list);
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&sp->u.scmd.crc_ctx->dsd_list);
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sp->flags |= SRB_CRC_CTX_DSD_VALID;
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} else {
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@ -1099,7 +1097,7 @@ qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp,
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sgl = scsi_prot_sglist(cmd);
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vha = sp->vha;
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difctx = sp->u.scmd.ctx;
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difctx = sp->u.scmd.crc_ctx;
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direction_to_device = cmd->sc_data_direction == DMA_TO_DEVICE;
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ql_dbg(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe021,
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"%s: scsi_cmnd: %p, crc_ctx: %p, sp: %p\n",
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@ -1439,7 +1437,7 @@ qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
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bundling = 0;
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/* Allocate CRC context from global pool */
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crc_ctx_pkt = sp->u.scmd.ctx =
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crc_ctx_pkt = sp->u.scmd.crc_ctx =
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dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
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if (!crc_ctx_pkt)
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@ -3188,7 +3186,7 @@ sufficient_dsds:
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goto queuing_error;
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}
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ctx = sp->u.scmd.ctx =
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ctx = sp->u.scmd.ct6_ctx =
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mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
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if (!ctx) {
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ql_log(ql_log_fatal, vha, 0x3010,
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@ -3384,9 +3382,9 @@ queuing_error:
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if (tot_dsds)
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scsi_dma_unmap(cmd);
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if (sp->u.scmd.ctx) {
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mempool_free(sp->u.scmd.ctx, ha->ctx_mempool);
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sp->u.scmd.ctx = NULL;
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if (sp->u.scmd.crc_ctx) {
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mempool_free(sp->u.scmd.crc_ctx, ha->ctx_mempool);
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sp->u.scmd.crc_ctx = NULL;
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}
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spin_unlock_irqrestore(&ha->hardware_lock, flags);
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@ -3686,7 +3686,7 @@ qla82xx_chip_reset_cleanup(scsi_qla_host_t *vha)
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for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) {
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sp = req->outstanding_cmds[cnt];
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if (sp) {
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if ((!sp->u.scmd.ctx ||
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if ((!sp->u.scmd.crc_ctx ||
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(sp->flags &
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SRB_FCP_CMND_DMA_VALID)) &&
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!ha->flags.isp82xx_fw_hung) {
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@ -656,7 +656,6 @@ void qla2x00_sp_free_dma(srb_t *sp)
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{
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struct qla_hw_data *ha = sp->vha->hw;
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struct scsi_cmnd *cmd = GET_CMD_SP(sp);
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void *ctx = GET_CMD_CTX_SP(sp);
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if (sp->flags & SRB_DMA_VALID) {
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scsi_dma_unmap(cmd);
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@ -669,24 +668,21 @@ void qla2x00_sp_free_dma(srb_t *sp)
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sp->flags &= ~SRB_CRC_PROT_DMA_VALID;
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}
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if (!ctx)
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return;
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if (sp->flags & SRB_CRC_CTX_DSD_VALID) {
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/* List assured to be having elements */
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qla2x00_clean_dsd_pool(ha, ctx);
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qla2x00_clean_dsd_pool(ha, sp->u.scmd.crc_ctx);
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sp->flags &= ~SRB_CRC_CTX_DSD_VALID;
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}
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if (sp->flags & SRB_CRC_CTX_DMA_VALID) {
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struct crc_context *ctx0 = ctx;
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struct crc_context *ctx0 = sp->u.scmd.crc_ctx;
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dma_pool_free(ha->dl_dma_pool, ctx0, ctx0->crc_ctx_dma);
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sp->flags &= ~SRB_CRC_CTX_DMA_VALID;
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}
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if (sp->flags & SRB_FCP_CMND_DMA_VALID) {
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struct ct6_dsd *ctx1 = ctx;
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struct ct6_dsd *ctx1 = sp->u.scmd.ct6_ctx;
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dma_pool_free(ha->fcp_cmnd_dma_pool, ctx1->fcp_cmnd,
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ctx1->fcp_cmnd_dma);
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@ -719,7 +715,6 @@ void qla2xxx_qpair_sp_free_dma(srb_t *sp)
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{
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struct scsi_cmnd *cmd = GET_CMD_SP(sp);
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struct qla_hw_data *ha = sp->fcport->vha->hw;
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void *ctx = GET_CMD_CTX_SP(sp);
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if (sp->flags & SRB_DMA_VALID) {
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scsi_dma_unmap(cmd);
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@ -732,17 +727,14 @@ void qla2xxx_qpair_sp_free_dma(srb_t *sp)
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sp->flags &= ~SRB_CRC_PROT_DMA_VALID;
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}
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if (!ctx)
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return;
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if (sp->flags & SRB_CRC_CTX_DSD_VALID) {
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/* List assured to be having elements */
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qla2x00_clean_dsd_pool(ha, ctx);
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qla2x00_clean_dsd_pool(ha, sp->u.scmd.crc_ctx);
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sp->flags &= ~SRB_CRC_CTX_DSD_VALID;
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}
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if (sp->flags & SRB_DIF_BUNDL_DMA_VALID) {
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struct crc_context *difctx = ctx;
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struct crc_context *difctx = sp->u.scmd.crc_ctx;
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struct dsd_dma *dif_dsd, *nxt_dsd;
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list_for_each_entry_safe(dif_dsd, nxt_dsd,
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@ -778,7 +770,7 @@ void qla2xxx_qpair_sp_free_dma(srb_t *sp)
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}
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if (sp->flags & SRB_FCP_CMND_DMA_VALID) {
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struct ct6_dsd *ctx1 = ctx;
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struct ct6_dsd *ctx1 = sp->u.scmd.ct6_ctx;
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dma_pool_free(ha->fcp_cmnd_dma_pool, ctx1->fcp_cmnd,
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ctx1->fcp_cmnd_dma);
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@ -790,9 +782,9 @@ void qla2xxx_qpair_sp_free_dma(srb_t *sp)
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}
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if (sp->flags & SRB_CRC_CTX_DMA_VALID) {
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struct crc_context *ctx0 = ctx;
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struct crc_context *ctx0 = sp->u.scmd.crc_ctx;
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dma_pool_free(ha->dl_dma_pool, ctx, ctx0->crc_ctx_dma);
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dma_pool_free(ha->dl_dma_pool, ctx0, ctx0->crc_ctx_dma);
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sp->flags &= ~SRB_CRC_CTX_DMA_VALID;
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}
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}
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