all: Fix warnings found by gcc 9.3.0 and 9.3.1

Signed-off-by: Maciej Szwed <maciej.szwed@intel.com>
Change-Id: Ie7c5b7b1c2d59a1f927eb5602f4ea5a003eff287
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2433
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>

lib/ftl/ftl_core.c

@@ -151,7 +151,7 @@ static void ftl_evict_cache_entry(struct spdk_ftl_dev *dev, struct ftl_wbuf_entr
 static struct ftl_wbuf_entry *
 ftl_acquire_wbuf_entry(struct ftl_io_channel *io_channel, int io_flags)
 {
-	struct ftl_wbuf_entry *entry;
+	struct ftl_wbuf_entry *entry = NULL;
 	uint32_t qdepth;
 
 	if (!(io_flags & FTL_IO_INTERNAL)) {
@@ -170,6 +170,8 @@ ftl_acquire_wbuf_entry(struct ftl_io_channel *io_channel, int io_flags)
 		return NULL;
 	}
 
+	assert(entry != NULL);
+
 	ftl_evict_cache_entry(io_channel->dev, entry);
 
 	entry->io_flags = io_flags;

lib/log/log.c

@@ -141,7 +141,7 @@ spdk_vlog(enum spdk_log_level level, const char *file, const int line, const cha
 {
 	int severity = LOG_INFO;
 	char buf[MAX_TMPBUF];
-	char timestamp[45];
+	char timestamp[64];
 
 	if (g_log) {
 		g_log(level, file, line, func, format, ap);

lib/lvol/lvol.c

@@ -892,7 +892,7 @@ end:
 bool
 spdk_lvol_deletable(struct spdk_lvol *lvol)
 {
-	size_t count;
+	size_t count = 0;
 
 	spdk_blob_get_clones(lvol->lvol_store->blobstore, lvol->blob_id, NULL, &count);
 	return (count == 0);

lib/nvme/nvme_pcie.c

@@ -477,11 +477,11 @@ static void
 nvme_pcie_ctrlr_map_cmb(struct nvme_pcie_ctrlr *pctrlr)
 {
 	int rc;
-	void *addr;
+	void *addr = NULL;
 	uint32_t bir;
 	union spdk_nvme_cmbsz_register cmbsz;
 	union spdk_nvme_cmbloc_register cmbloc;
-	uint64_t size, unit_size, offset, bar_size, bar_phys_addr;
+	uint64_t size, unit_size, offset, bar_size = 0, bar_phys_addr = 0;
 
 	if (nvme_pcie_ctrlr_get_cmbsz(pctrlr, &cmbsz) ||
 	    nvme_pcie_ctrlr_get_cmbloc(pctrlr, &cmbloc)) {
@@ -660,18 +660,19 @@ static int
 nvme_pcie_ctrlr_allocate_bars(struct nvme_pcie_ctrlr *pctrlr)
 {
 	int rc;
-	void *addr;
-	uint64_t phys_addr, size;
+	void *addr = NULL;
+	uint64_t phys_addr = 0, size = 0;
 
 	rc = spdk_pci_device_map_bar(pctrlr->devhandle, 0, &addr,
 				     &phys_addr, &size);
-	pctrlr->regs = (volatile struct spdk_nvme_registers *)addr;
-	if ((pctrlr->regs == NULL) || (rc != 0)) {
+
+	if ((addr == NULL) || (rc != 0)) {
 		SPDK_ERRLOG("nvme_pcicfg_map_bar failed with rc %d or bar %p\n",
-			    rc, pctrlr->regs);
+			    rc, addr);
 		return -1;
 	}
 
+	pctrlr->regs = (volatile struct spdk_nvme_registers *)addr;
 	pctrlr->regs_size = size;
 	nvme_pcie_ctrlr_map_cmb(pctrlr);
 

lib/nvmf/ctrlr_bdev.c

@@ -93,8 +93,8 @@ nvmf_bdev_ctrlr_complete_cmd(struct spdk_bdev_io *bdev_io, bool success,
 {
 	struct spdk_nvmf_request	*req = cb_arg;
 	struct spdk_nvme_cpl		*response = &req->rsp->nvme_cpl;
-	int				first_sc, first_sct, second_sc, second_sct;
-	uint32_t			cdw0;
+	int				first_sc = 0, first_sct = 0, second_sc = 0, second_sct = 0;
+	uint32_t			cdw0 = 0;
 	struct spdk_nvmf_request	*first_req = req->first_fused_req;
 
 	if (spdk_unlikely(first_req != NULL)) {

module/bdev/raid/bdev_raid.c

@@ -878,6 +878,8 @@ enum raid_level raid_bdev_parse_raid_level(const char *str)
 {
 	unsigned int i;
 
+	assert(str != NULL);
+
 	for (i = 0; g_raid_level_names[i].name != NULL; i++) {
 		if (strcasecmp(g_raid_level_names[i].name, str) == 0) {
 			return g_raid_level_names[i].value;

module/bdev/raid/bdev_raid_rpc.c

@@ -201,7 +201,7 @@ decode_raid_level(const struct spdk_json_val *val, void *out)
 	enum raid_level level;
 
 	ret = spdk_json_decode_string(val, &str);
-	if (ret == 0) {
+	if (ret == 0 && str != NULL) {
 		level = raid_bdev_parse_raid_level(str);
 		if (level == INVALID_RAID_LEVEL) {
 			ret = -EINVAL;