nvme fixes for Linux 6.6

- nvme-tcp iov len fix (Varun)
  - nvme-hwmon const qualifier for safety (Krzysztof)
  - nvme-fc null pointer checks (Nigel)
  - nvme-pci no numa node fix (Pratyush)
  - nvme timeout fix for non-compliant controllers (Keith)
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Merge tag 'nvme-6.6-2023-09-14' of git://git.infradead.org/nvme into block-6.6

Pull NVMe fixes from Keith:

"nvme fixes for Linux 6.6

 - nvme-tcp iov len fix (Varun)
 - nvme-hwmon const qualifier for safety (Krzysztof)
 - nvme-fc null pointer checks (Nigel)
 - nvme-pci no numa node fix (Pratyush)
 - nvme timeout fix for non-compliant controllers (Keith)"

* tag 'nvme-6.6-2023-09-14' of git://git.infradead.org/nvme:
  nvme: avoid bogus CRTO values
  nvme-pci: do not set the NUMA node of device if it has none
  nvme-fc: Prevent null pointer dereference in nvme_fc_io_getuuid()
  nvme: host: hwmon: constify pointers to hwmon_channel_info
  nvmet-tcp: pass iov_len instead of sg->length to bvec_set_page()

drivers/nvme/host/core.c

@@ -2245,25 +2245,8 @@ int nvme_enable_ctrl(struct nvme_ctrl *ctrl)
 	else
 		ctrl->ctrl_config = NVME_CC_CSS_NVM;
 
-	if (ctrl->cap & NVME_CAP_CRMS_CRWMS) {
-		u32 crto;
-
-		ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CRTO, &crto);
-		if (ret) {
-			dev_err(ctrl->device, "Reading CRTO failed (%d)\n",
-				ret);
-			return ret;
-		}
-
-		if (ctrl->cap & NVME_CAP_CRMS_CRIMS) {
-			ctrl->ctrl_config |= NVME_CC_CRIME;
-			timeout = NVME_CRTO_CRIMT(crto);
-		} else {
-			timeout = NVME_CRTO_CRWMT(crto);
-		}
-	} else {
-		timeout = NVME_CAP_TIMEOUT(ctrl->cap);
-	}
+	if (ctrl->cap & NVME_CAP_CRMS_CRWMS && ctrl->cap & NVME_CAP_CRMS_CRIMS)
+		ctrl->ctrl_config |= NVME_CC_CRIME;
 
 	ctrl->ctrl_config |= (NVME_CTRL_PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT;
 	ctrl->ctrl_config |= NVME_CC_AMS_RR | NVME_CC_SHN_NONE;
@@ -2277,6 +2260,39 @@ int nvme_enable_ctrl(struct nvme_ctrl *ctrl)
 	if (ret)
 		return ret;
 
+	/* CAP value may change after initial CC write */
+	ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &ctrl->cap);
+	if (ret)
+		return ret;
+
+	timeout = NVME_CAP_TIMEOUT(ctrl->cap);
+	if (ctrl->cap & NVME_CAP_CRMS_CRWMS) {
+		u32 crto, ready_timeout;
+
+		ret = ctrl->ops->reg_read32(ctrl, NVME_REG_CRTO, &crto);
+		if (ret) {
+			dev_err(ctrl->device, "Reading CRTO failed (%d)\n",
+				ret);
+			return ret;
+		}
+
+		/*
+		 * CRTO should always be greater or equal to CAP.TO, but some
+		 * devices are known to get this wrong. Use the larger of the
+		 * two values.
+		 */
+		if (ctrl->ctrl_config & NVME_CC_CRIME)
+			ready_timeout = NVME_CRTO_CRIMT(crto);
+		else
+			ready_timeout = NVME_CRTO_CRWMT(crto);
+
+		if (ready_timeout < timeout)
+			dev_warn_once(ctrl->device, "bad crto:%x cap:%llx\n",
+				      crto, ctrl->cap);
+		else
+			timeout = ready_timeout;
+	}
+
 	ctrl->ctrl_config |= NVME_CC_ENABLE;
 	ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config);
 	if (ret)

drivers/nvme/host/fc.c

@@ -1924,7 +1924,7 @@ char *nvme_fc_io_getuuid(struct nvmefc_fcp_req *req)
 	struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req);
 	struct request *rq = op->rq;
 
-	if (!IS_ENABLED(CONFIG_BLK_CGROUP_FC_APPID) || !rq->bio)
+	if (!IS_ENABLED(CONFIG_BLK_CGROUP_FC_APPID) || !rq || !rq->bio)
 		return NULL;
 	return blkcg_get_fc_appid(rq->bio);
 }

drivers/nvme/host/hwmon.c

@@ -187,7 +187,7 @@ static umode_t nvme_hwmon_is_visible(const void *_data,
 	return 0;
 }
 
-static const struct hwmon_channel_info *nvme_hwmon_info[] = {
+static const struct hwmon_channel_info *const nvme_hwmon_info[] = {
 	HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
 	HWMON_CHANNEL_INFO(temp,
 			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MIN |

drivers/nvme/host/pci.c

@@ -2916,9 +2916,6 @@ static struct nvme_dev *nvme_pci_alloc_dev(struct pci_dev *pdev,
 	struct nvme_dev *dev;
 	int ret = -ENOMEM;
 
-	if (node == NUMA_NO_NODE)
-		set_dev_node(&pdev->dev, first_memory_node);
-
 	dev = kzalloc_node(sizeof(*dev), GFP_KERNEL, node);
 	if (!dev)
 		return ERR_PTR(-ENOMEM);

drivers/nvme/target/tcp.c

@@ -348,7 +348,7 @@ static void nvmet_tcp_build_pdu_iovec(struct nvmet_tcp_cmd *cmd)
 	while (length) {
 		u32 iov_len = min_t(u32, length, sg->length - sg_offset);
 
-		bvec_set_page(iov, sg_page(sg), sg->length,
+		bvec_set_page(iov, sg_page(sg), iov_len,
 				sg->offset + sg_offset);
 
 		length -= iov_len;