From: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Date: Tue, 10 Oct 2017 16:18:18 +0530
Subject: scsi: be2iscsi: Fix misc static analysis errors
Patch-mainline: v4.15-rc1
Git-commit: 45efc940678ec813f2e6bc4fc45f9f19e686a3b8
References: bsc#1050253
The patch fixes errors reported by tools like smatch:
- removes unused structure fields
- removes dead code
- fixes code identation
Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
drivers/scsi/be2iscsi/be.h | 17 ++++++++--------
drivers/scsi/be2iscsi/be_cmds.c | 1 -
drivers/scsi/be2iscsi/be_cmds.h | 14 ++-----------
drivers/scsi/be2iscsi/be_main.c | 40 ++++++++++++++++--------------------
drivers/scsi/be2iscsi/be_main.h | 45 ++---------------------------------------
drivers/scsi/be2iscsi/be_mgmt.h | 6 ------
6 files changed, 29 insertions(+), 94 deletions(-)
diff --git a/drivers/scsi/be2iscsi/be.h b/drivers/scsi/be2iscsi/be.h
index 55e3f8b40eb3..1310fbf20072 100644
--- a/drivers/scsi/be2iscsi/be.h
+++ b/drivers/scsi/be2iscsi/be.h
@@ -81,12 +81,12 @@ static inline void queue_tail_inc(struct be_queue_info *q)
/*ISCSI */
struct be_aic_obj { /* Adaptive interrupt coalescing (AIC) info */
- u32 min_eqd; /* in usecs */
- u32 max_eqd; /* in usecs */
- u32 prev_eqd; /* in usecs */
- u32 et_eqd; /* configured val when aic is off */
- ulong jiffies;
- u64 eq_prev; /* Used to calculate eqe */
+ unsigned long jiffies;
+ u32 eq_prev; /* Used to calculate eqe */
+ u32 prev_eqd;
+#define BEISCSI_EQ_DELAY_MIN 0
+#define BEISCSI_EQ_DELAY_DEF 32
+#define BEISCSI_EQ_DELAY_MAX 128
};
struct be_eq_obj {
@@ -148,9 +148,8 @@ struct be_ctrl_info {
/* TAG is from 1...MAX_MCC_CMD, MASK includes MAX_MCC_CMD */
#define MCC_Q_CMD_TAG_MASK ((MAX_MCC_CMD << 1) - 1)
-#define PAGE_SHIFT_4K 12
-#define PAGE_SIZE_4K (1 << PAGE_SHIFT_4K)
-#define mcc_timeout 120000 /* 12s timeout */
+#define PAGE_SHIFT_4K 12
+#define PAGE_SIZE_4K (1 << PAGE_SHIFT_4K)
/* Returns number of pages spanned by the data starting at the given addr */
#define PAGES_4K_SPANNED(_address, size) \
diff --git a/drivers/scsi/be2iscsi/be_cmds.c b/drivers/scsi/be2iscsi/be_cmds.c
index 04996665e608..7d633ddbc668 100644
--- a/drivers/scsi/be2iscsi/be_cmds.c
+++ b/drivers/scsi/be2iscsi/be_cmds.c
@@ -947,7 +947,6 @@ int beiscsi_cmd_q_destroy(struct be_ctrl_info *ctrl, struct be_queue_info *q,
default:
mutex_unlock(&ctrl->mbox_lock);
BUG();
- return -ENXIO;
}
be_cmd_hdr_prepare(&req->hdr, subsys, opcode, sizeof(*req));
if (queue_type != QTYPE_SGL)
diff --git a/drivers/scsi/be2iscsi/be_cmds.h b/drivers/scsi/be2iscsi/be_cmds.h
index 5d5e8fbd9a57..fc252de21eba 100644
--- a/drivers/scsi/be2iscsi/be_cmds.h
+++ b/drivers/scsi/be2iscsi/be_cmds.h
@@ -1298,19 +1298,9 @@ struct be_cmd_get_port_name {
* a read command
*/
#define TGT_CTX_UPDT_CMD 7 /* Target context update */
-#define TGT_STS_CMD 8 /* Target R2T and other BHS
- * where only the status number
- * need to be updated
- */
-#define TGT_DATAIN_CMD 9 /* Target Data-Ins in response
- * to read command
- */
-#define TGT_SOS_PDU 10 /* Target:standalone status
- * response
- */
#define TGT_DM_CMD 11 /* Indicates that the bhs
- * preparedby
- * driver should not be touched
+ * prepared by driver should not
+ * be touched.
*/
/* Returns the number of items in the field array. */
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 02144c5a2b93..f8123ad5aef9 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -455,14 +455,12 @@ static int beiscsi_map_pci_bars(struct beiscsi_hba *phba,
return -ENOMEM;
phba->ctrl.csr = addr;
phba->csr_va = addr;
- phba->csr_pa.u.a64.address = pci_resource_start(pcidev, 2);
addr = ioremap_nocache(pci_resource_start(pcidev, 4), 128 * 1024);
if (addr == NULL)
goto pci_map_err;
phba->ctrl.db = addr;
phba->db_va = addr;
- phba->db_pa.u.a64.address = pci_resource_start(pcidev, 4);
if (phba->generation == BE_GEN2)
pcicfg_reg = 1;
@@ -476,7 +474,6 @@ static int beiscsi_map_pci_bars(struct beiscsi_hba *phba,
goto pci_map_err;
phba->ctrl.pcicfg = addr;
phba->pci_va = addr;
- phba->pci_pa.u.a64.address = pci_resource_start(pcidev, pcicfg_reg);
return 0;
pci_map_err:
@@ -942,12 +939,11 @@ static struct sgl_handle *alloc_io_sgl_handle(struct beiscsi_hba *phba)
* this can happen if clean_task is called on a task that
* failed in xmit_task or alloc_pdu.
*/
- beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_IO,
- "BM_%d : Double Free in IO SGL io_sgl_free_index=%d,"
- "value there=%p\n", phba->io_sgl_free_index,
- phba->io_sgl_hndl_base
- [phba->io_sgl_free_index]);
- spin_unlock_irqrestore(&phba->io_sgl_lock, flags);
+ beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_IO,
+ "BM_%d : Double Free in IO SGL io_sgl_free_index=%d, value there=%p\n",
+ phba->io_sgl_free_index,
+ phba->io_sgl_hndl_base[phba->io_sgl_free_index]);
+ spin_unlock_irqrestore(&phba->io_sgl_lock, flags);
return;
}
phba->io_sgl_hndl_base[phba->io_sgl_free_index] = psgl_handle;
@@ -1882,8 +1878,8 @@ unsigned int beiscsi_process_cq(struct be_eq_obj *pbe_eq, int budget)
be_dws_le_to_cpu(sol, sizeof(struct sol_cqe));
- code = (sol->dw[offsetof(struct amap_sol_cqe, code) /
- 32] & CQE_CODE_MASK);
+ code = (sol->dw[offsetof(struct amap_sol_cqe, code) / 32] &
+ CQE_CODE_MASK);
/* Get the CID */
if (is_chip_be2_be3r(phba)) {
@@ -3042,7 +3038,7 @@ static int beiscsi_create_eqs(struct beiscsi_hba *phba,
mem->dma = paddr;
ret = beiscsi_cmd_eq_create(&phba->ctrl, eq,
- phwi_context->cur_eqd);
+ BEISCSI_EQ_DELAY_DEF);
if (ret) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT,
"BM_%d : beiscsi_cmd_eq_create"
@@ -3526,13 +3522,14 @@ static int be_mcc_queues_create(struct beiscsi_hba *phba,
goto err;
/* Ask BE to create MCC compl queue; */
if (phba->pcidev->msix_enabled) {
- if (beiscsi_cmd_cq_create(ctrl, cq, &phwi_context->be_eq
- [phba->num_cpus].q, false, true, 0))
- goto mcc_cq_free;
+ if (beiscsi_cmd_cq_create(ctrl, cq,
+ &phwi_context->be_eq[phba->num_cpus].q,
+ false, true, 0))
+ goto mcc_cq_free;
} else {
if (beiscsi_cmd_cq_create(ctrl, cq, &phwi_context->be_eq[0].q,
false, true, 0))
- goto mcc_cq_free;
+ goto mcc_cq_free;
}
/* Alloc MCC queue */
@@ -3707,9 +3704,6 @@ static int hwi_init_port(struct beiscsi_hba *phba)
phwi_ctrlr = phba->phwi_ctrlr;
phwi_context = phwi_ctrlr->phwi_ctxt;
- phwi_context->max_eqd = 128;
- phwi_context->min_eqd = 0;
- phwi_context->cur_eqd = 32;
/* set port optic state to unknown */
phba->optic_state = 0xff;
@@ -4810,10 +4804,10 @@ static int beiscsi_task_xmit(struct iscsi_task *task)
sg = scsi_sglist(sc);
if (sc->sc_data_direction == DMA_TO_DEVICE)
writedir = 1;
- else
+ else
writedir = 0;
- return phba->iotask_fn(task, sg, num_sg, xferlen, writedir);
+ return phba->iotask_fn(task, sg, num_sg, xferlen, writedir);
}
/**
@@ -5234,8 +5228,8 @@ static void beiscsi_eqd_update_work(struct work_struct *work)
if (eqd < 8)
eqd = 0;
- eqd = min_t(u32, eqd, phwi_context->max_eqd);
- eqd = max_t(u32, eqd, phwi_context->min_eqd);
+ eqd = min_t(u32, eqd, BEISCSI_EQ_DELAY_MAX);
+ eqd = max_t(u32, eqd, BEISCSI_EQ_DELAY_MIN);
aic->jiffies = now;
aic->eq_prev = pbe_eq->cq_count;
diff --git a/drivers/scsi/be2iscsi/be_main.h b/drivers/scsi/be2iscsi/be_main.h
index 81ce3ffda968..6d8f819ec617 100644
--- a/drivers/scsi/be2iscsi/be_main.h
+++ b/drivers/scsi/be2iscsi/be_main.h
@@ -59,7 +59,7 @@
#define BE2_DEFPDU_DATA_SZ 8192
#define BE2_MAX_NUM_CQ_PROC 512
-#define MAX_CPUS 64
+#define MAX_CPUS 64U
#define BEISCSI_MAX_NUM_CPUS 7
#define BEISCSI_VER_STRLEN 32
@@ -77,9 +77,7 @@
#define BEISCSI_MAX_CMD_LEN 16 /* scsi_host->max_cmd_len */
#define BEISCSI_NUM_MAX_LUN 256 /* scsi_host->max_lun */
-#define BEISCSI_NUM_DEVICES_SUPPORTED 0x01
#define BEISCSI_MAX_FRAGS_INIT 192
-#define BE_NUM_MSIX_ENTRIES 1
#define BE_SENSE_INFO_SIZE 258
#define BE_ISCSI_PDU_HEADER_SIZE 64
@@ -209,13 +207,8 @@ struct mem_array {
};
struct be_mem_descriptor {
- unsigned int index; /* Index of this memory parameter */
- unsigned int category; /* type indicates cached/non-cached */
- unsigned int num_elements; /* number of elements in this
- * descriptor
- */
- unsigned int alignment_mask; /* Alignment mask for this block */
unsigned int size_in_bytes; /* Size required by memory block */
+ unsigned int num_elements;
struct mem_array *mem_array;
};
@@ -238,32 +231,12 @@ struct hba_parameters {
unsigned int num_eq_entries;
unsigned int wrbs_per_cxn;
unsigned int hwi_ws_sz;
- /**
- * These are calculated from other params. They're here
- * for debug purposes
- */
- unsigned int num_mcc_pages;
- unsigned int num_mcc_cq_pages;
- unsigned int num_cq_pages;
- unsigned int num_eq_pages;
-
- unsigned int num_async_pdu_buf_pages;
- unsigned int num_async_pdu_buf_sgl_pages;
- unsigned int num_async_pdu_buf_cq_pages;
-
- unsigned int num_async_pdu_hdr_pages;
- unsigned int num_async_pdu_hdr_sgl_pages;
- unsigned int num_async_pdu_hdr_cq_pages;
-
- unsigned int num_sge;
};
#define BEISCSI_GET_ULP_FROM_CRI(phwi_ctrlr, cri) \
(phwi_ctrlr->wrb_context[cri].ulp_num)
struct hwi_wrb_context {
spinlock_t wrb_lock;
- struct list_head wrb_handle_list;
- struct list_head wrb_handle_drvr_list;
struct wrb_handle **pwrb_handle_base;
struct wrb_handle **pwrb_handle_basestd;
struct iscsi_wrb *plast_wrb;
@@ -272,8 +245,6 @@ struct hwi_wrb_context {
unsigned short wrb_handles_available;
unsigned short cid;
uint8_t ulp_num; /* ULP to which CID binded */
- uint16_t register_set;
- uint16_t doorbell_format;
uint32_t doorbell_offset;
};
@@ -310,9 +281,6 @@ struct beiscsi_hba {
u8 __iomem *csr_va; /* CSR */
u8 __iomem *db_va; /* Door Bell */
u8 __iomem *pci_va; /* PCI Config */
- struct be_bus_address csr_pa; /* CSR */
- struct be_bus_address db_pa; /* CSR */
- struct be_bus_address pci_pa; /* CSR */
/* PCI representation of our HBA */
struct pci_dev *pcidev;
unsigned int num_cpus;
@@ -324,7 +292,6 @@ struct beiscsi_hba {
unsigned short io_sgl_free_index;
unsigned short io_sgl_hndl_avbl;
struct sgl_handle **io_sgl_hndl_base;
- struct sgl_handle **sgl_hndl_array;
unsigned short eh_sgl_alloc_index;
unsigned short eh_sgl_free_index;
@@ -1009,10 +976,6 @@ struct be_ring {
};
struct hwi_controller {
- struct list_head io_sgl_list;
- struct list_head eh_sgl_list;
- struct sgl_handle *psgl_handle_base;
-
struct hwi_wrb_context *wrb_context;
struct be_ring default_pdu_hdr[BEISCSI_ULP_COUNT];
struct be_ring default_pdu_data[BEISCSI_ULP_COUNT];
@@ -1036,10 +999,6 @@ struct wrb_handle {
};
struct hwi_context_memory {
- /* Adaptive interrupt coalescing (AIC) info */
- u16 min_eqd; /* in usecs */
- u16 max_eqd; /* in usecs */
- u16 cur_eqd; /* in usecs */
struct be_eq_obj be_eq[MAX_CPUS];
struct be_queue_info be_cq[MAX_CPUS - 1];
diff --git a/drivers/scsi/be2iscsi/be_mgmt.h b/drivers/scsi/be2iscsi/be_mgmt.h
index 8d886f834819..b310c24949cc 100644
--- a/drivers/scsi/be2iscsi/be_mgmt.h
+++ b/drivers/scsi/be2iscsi/be_mgmt.h
@@ -157,7 +157,6 @@ struct be_bsg_vendor_cmd {
struct beiscsi_endpoint {
struct beiscsi_hba *phba;
- struct beiscsi_sess *sess;
struct beiscsi_conn *conn;
struct iscsi_endpoint *openiscsi_ep;
unsigned short ip_type;
@@ -169,11 +168,6 @@ struct beiscsi_endpoint {
u16 cid_vld;
};
-unsigned int mgmt_invalidate_connection(struct beiscsi_hba *phba,
- struct beiscsi_endpoint *beiscsi_ep,
- unsigned short cid,
- unsigned short issue_reset,
- unsigned short savecfg_flag);
int beiscsi_mgmt_invalidate_icds(struct beiscsi_hba *phba,
struct invldt_cmd_tbl *inv_tbl,
unsigned int nents);