Merging upstream version 6.7.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

11 files changed, 241 insertions, 128 deletions

diff --git a/drivers/net/ethernet/amd/au1000_eth.c b/drivers/net/ethernet/amd/au1000_eth.c
index c5cec4e794..85c978149b 100644
--- a/drivers/net/ethernet/amd/au1000_eth.c
+++ b/drivers/net/ethernet/amd/au1000_eth.c
@@ -1323,7 +1323,7 @@ out:
 	return err;
 }
 
-static int au1000_remove(struct platform_device *pdev)
+static void au1000_remove(struct platform_device *pdev)
 {
 	struct net_device *dev = platform_get_drvdata(pdev);
 	struct au1000_private *aup = netdev_priv(dev);
@@ -1359,13 +1359,11 @@ static int au1000_remove(struct platform_device *pdev)
 	release_mem_region(macen->start, resource_size(macen));
 
 	free_netdev(dev);
-
-	return 0;
 }
 
 static struct platform_driver au1000_eth_driver = {
 	.probe  = au1000_probe,
-	.remove = au1000_remove,
+	.remove_new = au1000_remove,
 	.driver = {
 		.name   = "au1000-eth",
 	},
diff --git a/drivers/net/ethernet/amd/pds_core/adminq.c b/drivers/net/ethernet/amd/pds_core/adminq.c
index 5beadabc21..ea773cfa0a 100644
--- a/drivers/net/ethernet/amd/pds_core/adminq.c
+++ b/drivers/net/ethernet/amd/pds_core/adminq.c
@@ -63,6 +63,15 @@ static int pdsc_process_notifyq(struct pdsc_qcq *qcq)
 	return nq_work;
 }
 
+static bool pdsc_adminq_inc_if_up(struct pdsc *pdsc)
+{
+	if (pdsc->state & BIT_ULL(PDSC_S_STOPPING_DRIVER) ||
+	    pdsc->state & BIT_ULL(PDSC_S_FW_DEAD))
+		return false;
+
+	return refcount_inc_not_zero(&pdsc->adminq_refcnt);
+}
+
 void pdsc_process_adminq(struct pdsc_qcq *qcq)
 {
 	union pds_core_adminq_comp *comp;
@@ -75,9 +84,9 @@ void pdsc_process_adminq(struct pdsc_qcq *qcq)
 	int aq_work = 0;
 	int credits;
 
-	/* Don't process AdminQ when shutting down */
-	if (pdsc->state & BIT_ULL(PDSC_S_STOPPING_DRIVER)) {
-		dev_err(pdsc->dev, "%s: called while PDSC_S_STOPPING_DRIVER\n",
+	/* Don't process AdminQ when it's not up */
+	if (!pdsc_adminq_inc_if_up(pdsc)) {
+		dev_err(pdsc->dev, "%s: called while adminq is unavailable\n",
 			__func__);
 		return;
 	}
@@ -124,6 +133,7 @@ credits:
 		pds_core_intr_credits(&pdsc->intr_ctrl[qcq->intx],
 				      credits,
 				      PDS_CORE_INTR_CRED_REARM);
+	refcount_dec(&pdsc->adminq_refcnt);
 }
 
 void pdsc_work_thread(struct work_struct *work)
@@ -135,18 +145,20 @@ void pdsc_work_thread(struct work_struct *work)
 
 irqreturn_t pdsc_adminq_isr(int irq, void *data)
 {
-	struct pdsc_qcq *qcq = data;
-	struct pdsc *pdsc = qcq->pdsc;
+	struct pdsc *pdsc = data;
+	struct pdsc_qcq *qcq;
 
-	/* Don't process AdminQ when shutting down */
-	if (pdsc->state & BIT_ULL(PDSC_S_STOPPING_DRIVER)) {
-		dev_err(pdsc->dev, "%s: called while PDSC_S_STOPPING_DRIVER\n",
+	/* Don't process AdminQ when it's not up */
+	if (!pdsc_adminq_inc_if_up(pdsc)) {
+		dev_err(pdsc->dev, "%s: called while adminq is unavailable\n",
 			__func__);
 		return IRQ_HANDLED;
 	}
 
+	qcq = &pdsc->adminqcq;
 	queue_work(pdsc->wq, &qcq->work);
 	pds_core_intr_mask(&pdsc->intr_ctrl[qcq->intx], PDS_CORE_INTR_MASK_CLEAR);
+	refcount_dec(&pdsc->adminq_refcnt);
 
 	return IRQ_HANDLED;
 }
@@ -179,10 +191,16 @@ static int __pdsc_adminq_post(struct pdsc *pdsc,
 
 	/* Check that the FW is running */
 	if (!pdsc_is_fw_running(pdsc)) {
-		u8 fw_status = ioread8(&pdsc->info_regs->fw_status);
-
-		dev_info(pdsc->dev, "%s: post failed - fw not running %#02x:\n",
-			 __func__, fw_status);
+		if (pdsc->info_regs) {
+			u8 fw_status =
+				ioread8(&pdsc->info_regs->fw_status);
+
+			dev_info(pdsc->dev, "%s: post failed - fw not running %#02x:\n",
+				 __func__, fw_status);
+		} else {
+			dev_info(pdsc->dev, "%s: post failed - BARs not setup\n",
+				 __func__);
+		}
 		ret = -ENXIO;
 
 		goto err_out_unlock;
@@ -230,6 +248,12 @@ int pdsc_adminq_post(struct pdsc *pdsc,
 	int err = 0;
 	int index;
 
+	if (!pdsc_adminq_inc_if_up(pdsc)) {
+		dev_dbg(pdsc->dev, "%s: preventing adminq cmd %u\n",
+			__func__, cmd->opcode);
+		return -ENXIO;
+	}
+
 	wc.qcq = &pdsc->adminqcq;
 	index = __pdsc_adminq_post(pdsc, &pdsc->adminqcq, cmd, comp, &wc);
 	if (index < 0) {
@@ -248,10 +272,16 @@ int pdsc_adminq_post(struct pdsc *pdsc,
 			break;
 
 		if (!pdsc_is_fw_running(pdsc)) {
-			u8 fw_status = ioread8(&pdsc->info_regs->fw_status);
-
-			dev_dbg(pdsc->dev, "%s: post wait failed - fw not running %#02x:\n",
-				__func__, fw_status);
+			if (pdsc->info_regs) {
+				u8 fw_status =
+					ioread8(&pdsc->info_regs->fw_status);
+
+				dev_dbg(pdsc->dev, "%s: post wait failed - fw not running %#02x:\n",
+					__func__, fw_status);
+			} else {
+				dev_dbg(pdsc->dev, "%s: post wait failed - BARs not setup\n",
+					__func__);
+			}
 			err = -ENXIO;
 			break;
 		}
@@ -285,6 +315,8 @@ err_out:
 			queue_work(pdsc->wq, &pdsc->health_work);
 	}
 
+	refcount_dec(&pdsc->adminq_refcnt);
+
 	return err;
 }
 EXPORT_SYMBOL_GPL(pdsc_adminq_post);
diff --git a/drivers/net/ethernet/amd/pds_core/core.c b/drivers/net/ethernet/amd/pds_core/core.c
index 36f9b932b9..7658a72867 100644
--- a/drivers/net/ethernet/amd/pds_core/core.c
+++ b/drivers/net/ethernet/amd/pds_core/core.c
@@ -125,7 +125,7 @@ static int pdsc_qcq_intr_alloc(struct pdsc *pdsc, struct pdsc_qcq *qcq)
 
 	snprintf(name, sizeof(name), "%s-%d-%s",
 		 PDS_CORE_DRV_NAME, pdsc->pdev->bus->number, qcq->q.name);
-	index = pdsc_intr_alloc(pdsc, name, pdsc_adminq_isr, qcq);
+	index = pdsc_intr_alloc(pdsc, name, pdsc_adminq_isr, pdsc);
 	if (index < 0)
 		return index;
 	qcq->intx = index;
@@ -152,11 +152,8 @@ void pdsc_qcq_free(struct pdsc *pdsc, struct pdsc_qcq *qcq)
 		dma_free_coherent(dev, qcq->cq_size,
 				  qcq->cq_base, qcq->cq_base_pa);
 
-	if (qcq->cq.info)
-		vfree(qcq->cq.info);
-
-	if (qcq->q.info)
-		vfree(qcq->q.info);
+	vfree(qcq->cq.info);
+	vfree(qcq->q.info);
 
 	memset(qcq, 0, sizeof(*qcq));
 }
@@ -407,10 +404,7 @@ int pdsc_setup(struct pdsc *pdsc, bool init)
 	int numdescs;
 	int err;
 
-	if (init)
-		err = pdsc_dev_init(pdsc);
-	else
-		err = pdsc_dev_reinit(pdsc);
+	err = pdsc_dev_init(pdsc);
 	if (err)
 		return err;
 
@@ -445,13 +439,15 @@ int pdsc_setup(struct pdsc *pdsc, bool init)
 		goto err_out_teardown;
 
 	/* Set up the VIFs */
-	err = pdsc_viftypes_init(pdsc);
-	if (err)
-		goto err_out_teardown;
+	if (init) {
+		err = pdsc_viftypes_init(pdsc);
+		if (err)
+			goto err_out_teardown;
 
-	if (init)
 		pdsc_debugfs_add_viftype(pdsc);
+	}
 
+	refcount_set(&pdsc->adminq_refcnt, 1);
 	clear_bit(PDSC_S_FW_DEAD, &pdsc->state);
 	return 0;
 
@@ -466,20 +462,23 @@ void pdsc_teardown(struct pdsc *pdsc, bool removing)
 
 	if (!pdsc->pdev->is_virtfn)
 		pdsc_devcmd_reset(pdsc);
+	if (pdsc->adminqcq.work.func)
+		cancel_work_sync(&pdsc->adminqcq.work);
 	pdsc_qcq_free(pdsc, &pdsc->notifyqcq);
 	pdsc_qcq_free(pdsc, &pdsc->adminqcq);
 
-	kfree(pdsc->viftype_status);
-	pdsc->viftype_status = NULL;
+	if (removing) {
+		kfree(pdsc->viftype_status);
+		pdsc->viftype_status = NULL;
+	}
 
 	if (pdsc->intr_info) {
 		for (i = 0; i < pdsc->nintrs; i++)
 			pdsc_intr_free(pdsc, i);
 
-		if (removing) {
-			kfree(pdsc->intr_info);
-			pdsc->intr_info = NULL;
-		}
+		kfree(pdsc->intr_info);
+		pdsc->intr_info = NULL;
+		pdsc->nintrs = 0;
 	}
 
 	if (pdsc->kern_dbpage) {
@@ -487,6 +486,7 @@ void pdsc_teardown(struct pdsc *pdsc, bool removing)
 		pdsc->kern_dbpage = NULL;
 	}
 
+	pci_free_irq_vectors(pdsc->pdev);
 	set_bit(PDSC_S_FW_DEAD, &pdsc->state);
 }
 
@@ -512,7 +512,25 @@ void pdsc_stop(struct pdsc *pdsc)
 					   PDS_CORE_INTR_MASK_SET);
 }
 
-static void pdsc_fw_down(struct pdsc *pdsc)
+static void pdsc_adminq_wait_and_dec_once_unused(struct pdsc *pdsc)
+{
+	/* The driver initializes the adminq_refcnt to 1 when the adminq is
+	 * allocated and ready for use. Other users/requesters will increment
+	 * the refcnt while in use. If the refcnt is down to 1 then the adminq
+	 * is not in use and the refcnt can be cleared and adminq freed. Before
+	 * calling this function the driver will set PDSC_S_FW_DEAD, which
+	 * prevent subsequent attempts to use the adminq and increment the
+	 * refcnt to fail. This guarantees that this function will eventually
+	 * exit.
+	 */
+	while (!refcount_dec_if_one(&pdsc->adminq_refcnt)) {
+		dev_dbg_ratelimited(pdsc->dev, "%s: adminq in use\n",
+				    __func__);
+		cpu_relax();
+	}
+}
+
+void pdsc_fw_down(struct pdsc *pdsc)
 {
 	union pds_core_notifyq_comp reset_event = {
 		.reset.ecode = cpu_to_le16(PDS_EVENT_RESET),
@@ -520,10 +538,15 @@ static void pdsc_fw_down(struct pdsc *pdsc)
 	};
 
 	if (test_and_set_bit(PDSC_S_FW_DEAD, &pdsc->state)) {
-		dev_err(pdsc->dev, "%s: already happening\n", __func__);
+		dev_warn(pdsc->dev, "%s: already happening\n", __func__);
 		return;
 	}
 
+	if (pdsc->pdev->is_virtfn)
+		return;
+
+	pdsc_adminq_wait_and_dec_once_unused(pdsc);
+
 	/* Notify clients of fw_down */
 	if (pdsc->fw_reporter)
 		devlink_health_report(pdsc->fw_reporter, "FW down reported", pdsc);
@@ -533,7 +556,7 @@ static void pdsc_fw_down(struct pdsc *pdsc)
 	pdsc_teardown(pdsc, PDSC_TEARDOWN_RECOVERY);
 }
 
-static void pdsc_fw_up(struct pdsc *pdsc)
+void pdsc_fw_up(struct pdsc *pdsc)
 {
 	union pds_core_notifyq_comp reset_event = {
 		.reset.ecode = cpu_to_le16(PDS_EVENT_RESET),
@@ -546,6 +569,11 @@ static void pdsc_fw_up(struct pdsc *pdsc)
 		return;
 	}
 
+	if (pdsc->pdev->is_virtfn) {
+		clear_bit(PDSC_S_FW_DEAD, &pdsc->state);
+		return;
+	}
+
 	err = pdsc_setup(pdsc, PDSC_SETUP_RECOVERY);
 	if (err)
 		goto err_out;
@@ -567,6 +595,24 @@ err_out:
 	pdsc_teardown(pdsc, PDSC_TEARDOWN_RECOVERY);
 }
 
+static void pdsc_check_pci_health(struct pdsc *pdsc)
+{
+	u8 fw_status;
+
+	/* some sort of teardown already in progress */
+	if (!pdsc->info_regs)
+		return;
+
+	fw_status = ioread8(&pdsc->info_regs->fw_status);
+
+	/* is PCI broken? */
+	if (fw_status != PDS_RC_BAD_PCI)
+		return;
+
+	pdsc_reset_prepare(pdsc->pdev);
+	pdsc_reset_done(pdsc->pdev);
+}
+
 void pdsc_health_thread(struct work_struct *work)
 {
 	struct pdsc *pdsc = container_of(work, struct pdsc, health_work);
@@ -593,6 +639,8 @@ void pdsc_health_thread(struct work_struct *work)
 			pdsc_fw_down(pdsc);
 	}
 
+	pdsc_check_pci_health(pdsc);
+
 	pdsc->fw_generation = pdsc->fw_status & PDS_CORE_FW_STS_F_GENERATION;
 
 out_unlock:
diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h
index b1c1f1007b..110c4b826b 100644
--- a/drivers/net/ethernet/amd/pds_core/core.h
+++ b/drivers/net/ethernet/amd/pds_core/core.h
@@ -184,6 +184,7 @@ struct pdsc {
 	struct mutex devcmd_lock;	/* lock for dev_cmd operations */
 	struct mutex config_lock;	/* lock for configuration operations */
 	spinlock_t adminq_lock;		/* lock for adminq operations */
+	refcount_t adminq_refcnt;
 	struct pds_core_dev_info_regs __iomem *info_regs;
 	struct pds_core_dev_cmd_regs __iomem *cmd_regs;
 	struct pds_core_intr __iomem *intr_ctrl;
@@ -280,9 +281,11 @@ int pdsc_devcmd_locked(struct pdsc *pdsc, union pds_core_dev_cmd *cmd,
 		       union pds_core_dev_comp *comp, int max_seconds);
 int pdsc_devcmd_init(struct pdsc *pdsc);
 int pdsc_devcmd_reset(struct pdsc *pdsc);
-int pdsc_dev_reinit(struct pdsc *pdsc);
 int pdsc_dev_init(struct pdsc *pdsc);
 
+void pdsc_reset_prepare(struct pci_dev *pdev);
+void pdsc_reset_done(struct pci_dev *pdev);
+
 int pdsc_intr_alloc(struct pdsc *pdsc, char *name,
 		    irq_handler_t handler, void *data);
 void pdsc_intr_free(struct pdsc *pdsc, int index);
@@ -309,4 +312,8 @@ irqreturn_t pdsc_adminq_isr(int irq, void *data);
 
 int pdsc_firmware_update(struct pdsc *pdsc, const struct firmware *fw,
 			 struct netlink_ext_ack *extack);
+
+void pdsc_fw_down(struct pdsc *pdsc);
+void pdsc_fw_up(struct pdsc *pdsc);
+
 #endif /* _PDSC_H_ */
diff --git a/drivers/net/ethernet/amd/pds_core/debugfs.c b/drivers/net/ethernet/amd/pds_core/debugfs.c
index 8ec392299b..4e8579ca1c 100644
--- a/drivers/net/ethernet/amd/pds_core/debugfs.c
+++ b/drivers/net/ethernet/amd/pds_core/debugfs.c
@@ -64,6 +64,10 @@ DEFINE_SHOW_ATTRIBUTE(identity);
 
 void pdsc_debugfs_add_ident(struct pdsc *pdsc)
 {
+	/* This file will already exist in the reset flow */
+	if (debugfs_lookup("identity", pdsc->dentry))
+		return;
+
 	debugfs_create_file("identity", 0400, pdsc->dentry,
 			    pdsc, &identity_fops);
 }
diff --git a/drivers/net/ethernet/amd/pds_core/dev.c b/drivers/net/ethernet/amd/pds_core/dev.c
index eb178728ed..e65a1632df 100644
--- a/drivers/net/ethernet/amd/pds_core/dev.c
+++ b/drivers/net/ethernet/amd/pds_core/dev.c
@@ -42,6 +42,8 @@ int pdsc_err_to_errno(enum pds_core_status_code code)
 		return -ERANGE;
 	case PDS_RC_BAD_ADDR:
 		return -EFAULT;
+	case PDS_RC_BAD_PCI:
+		return -ENXIO;
 	case PDS_RC_EOPCODE:
 	case PDS_RC_EINTR:
 	case PDS_RC_DEV_CMD:
@@ -55,6 +57,9 @@ int pdsc_err_to_errno(enum pds_core_status_code code)
 
 bool pdsc_is_fw_running(struct pdsc *pdsc)
 {
+	if (!pdsc->info_regs)
+		return false;
+
 	pdsc->fw_status = ioread8(&pdsc->info_regs->fw_status);
 	pdsc->last_fw_time = jiffies;
 	pdsc->last_hb = ioread32(&pdsc->info_regs->fw_heartbeat);
@@ -62,7 +67,7 @@ bool pdsc_is_fw_running(struct pdsc *pdsc)
 	/* Firmware is useful only if the running bit is set and
 	 * fw_status != 0xff (bad PCI read)
 	 */
-	return (pdsc->fw_status != 0xff) &&
+	return (pdsc->fw_status != PDS_RC_BAD_PCI) &&
 		(pdsc->fw_status & PDS_CORE_FW_STS_F_RUNNING);
 }
 
@@ -128,6 +133,7 @@ static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds)
 	unsigned long max_wait;
 	unsigned long duration;
 	int timeout = 0;
+	bool running;
 	int done = 0;
 	int err = 0;
 	int status;
@@ -136,6 +142,10 @@ static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds)
 	max_wait = start_time + (max_seconds * HZ);
 
 	while (!done && !timeout) {
+		running = pdsc_is_fw_running(pdsc);
+		if (!running)
+			break;
+
 		done = pdsc_devcmd_done(pdsc);
 		if (done)
 			break;
@@ -152,7 +162,7 @@ static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds)
 		dev_dbg(dev, "DEVCMD %d %s after %ld secs\n",
 			opcode, pdsc_devcmd_str(opcode), duration / HZ);
 
-	if (!done || timeout) {
+	if ((!done || timeout) && running) {
 		dev_err(dev, "DEVCMD %d %s timeout, done %d timeout %d max_seconds=%d\n",
 			opcode, pdsc_devcmd_str(opcode), done, timeout,
 			max_seconds);
@@ -175,13 +185,17 @@ int pdsc_devcmd_locked(struct pdsc *pdsc, union pds_core_dev_cmd *cmd,
 {
 	int err;
 
+	if (!pdsc->cmd_regs)
+		return -ENXIO;
+
 	memcpy_toio(&pdsc->cmd_regs->cmd, cmd, sizeof(*cmd));
 	pdsc_devcmd_dbell(pdsc);
 	err = pdsc_devcmd_wait(pdsc, cmd->opcode, max_seconds);
-	memcpy_fromio(comp, &pdsc->cmd_regs->comp, sizeof(*comp));
 
 	if ((err == -ENXIO || err == -ETIMEDOUT) && pdsc->wq)
 		queue_work(pdsc->wq, &pdsc->health_work);
+	else
+		memcpy_fromio(comp, &pdsc->cmd_regs->comp, sizeof(*comp));
 
 	return err;
 }
@@ -302,13 +316,6 @@ static int pdsc_identify(struct pdsc *pdsc)
 	return 0;
 }
 
-int pdsc_dev_reinit(struct pdsc *pdsc)
-{
-	pdsc_init_devinfo(pdsc);
-
-	return pdsc_identify(pdsc);
-}
-
 int pdsc_dev_init(struct pdsc *pdsc)
 {
 	unsigned int nintrs;
diff --git a/drivers/net/ethernet/amd/pds_core/devlink.c b/drivers/net/ethernet/amd/pds_core/devlink.c
index d2abf32b93..54864f27c8 100644
--- a/drivers/net/ethernet/amd/pds_core/devlink.c
+++ b/drivers/net/ethernet/amd/pds_core/devlink.c
@@ -111,7 +111,8 @@ int pdsc_dl_info_get(struct devlink *dl, struct devlink_info_req *req,
 
 	mutex_lock(&pdsc->devcmd_lock);
 	err = pdsc_devcmd_locked(pdsc, &cmd, &comp, pdsc->devcmd_timeout * 2);
-	memcpy_fromio(&fw_list, pdsc->cmd_regs->data, sizeof(fw_list));
+	if (!err)
+		memcpy_fromio(&fw_list, pdsc->cmd_regs->data, sizeof(fw_list));
 	mutex_unlock(&pdsc->devcmd_lock);
 	if (err && err != -EIO)
 		return err;
@@ -124,6 +125,8 @@ int pdsc_dl_info_get(struct devlink *dl, struct devlink_info_req *req,
 			snprintf(buf, sizeof(buf), "fw.slot_%d", i);
 		err = devlink_info_version_stored_put(req, buf,
 						      fw_list.fw_names[i].fw_version);
+		if (err)
+			return err;
 	}
 
 	err = devlink_info_version_running_put(req,
@@ -154,33 +157,20 @@ int pdsc_fw_reporter_diagnose(struct devlink_health_reporter *reporter,
 			      struct netlink_ext_ack *extack)
 {
 	struct pdsc *pdsc = devlink_health_reporter_priv(reporter);
-	int err;
 
 	mutex_lock(&pdsc->config_lock);
-
 	if (test_bit(PDSC_S_FW_DEAD, &pdsc->state))
-		err = devlink_fmsg_string_pair_put(fmsg, "Status", "dead");
+		devlink_fmsg_string_pair_put(fmsg, "Status", "dead");
 	else if (!pdsc_is_fw_good(pdsc))
-		err = devlink_fmsg_string_pair_put(fmsg, "Status", "unhealthy");
+		devlink_fmsg_string_pair_put(fmsg, "Status", "unhealthy");
 	else
-		err = devlink_fmsg_string_pair_put(fmsg, "Status", "healthy");
-
+		devlink_fmsg_string_pair_put(fmsg, "Status", "healthy");
 	mutex_unlock(&pdsc->config_lock);
 
-	if (err)
-		return err;
-
-	err = devlink_fmsg_u32_pair_put(fmsg, "State",
-					pdsc->fw_status &
-						~PDS_CORE_FW_STS_F_GENERATION);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_u32_pair_put(fmsg, "Generation",
-					pdsc->fw_generation >> 4);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "State",
+				  pdsc->fw_status & ~PDS_CORE_FW_STS_F_GENERATION);
+	devlink_fmsg_u32_pair_put(fmsg, "Generation", pdsc->fw_generation >> 4);
+	devlink_fmsg_u32_pair_put(fmsg, "Recoveries", pdsc->fw_recoveries);
 
-	return devlink_fmsg_u32_pair_put(fmsg, "Recoveries",
-					 pdsc->fw_recoveries);
+	return 0;
 }
diff --git a/drivers/net/ethernet/amd/pds_core/fw.c b/drivers/net/ethernet/amd/pds_core/fw.c
index 90a811f387..fa626719e6 100644
--- a/drivers/net/ethernet/amd/pds_core/fw.c
+++ b/drivers/net/ethernet/amd/pds_core/fw.c
@@ -107,6 +107,9 @@ int pdsc_firmware_update(struct pdsc *pdsc, const struct firmware *fw,
 
 	dev_info(pdsc->dev, "Installing firmware\n");
 
+	if (!pdsc->cmd_regs)
+		return -ENXIO;
+
 	dl = priv_to_devlink(pdsc);
 	devlink_flash_update_status_notify(dl, "Preparing to flash",
 					   NULL, 0, 0);
diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c
index 3a45bf474a..cdbf053b53 100644
--- a/drivers/net/ethernet/amd/pds_core/main.c
+++ b/drivers/net/ethernet/amd/pds_core/main.c
@@ -37,6 +37,11 @@ static void pdsc_unmap_bars(struct pdsc *pdsc)
 	struct pdsc_dev_bar *bars = pdsc->bars;
 	unsigned int i;
 
+	pdsc->info_regs = NULL;
+	pdsc->cmd_regs = NULL;
+	pdsc->intr_status = NULL;
+	pdsc->intr_ctrl = NULL;
+
 	for (i = 0; i < PDS_CORE_BARS_MAX; i++) {
 		if (bars[i].vaddr)
 			pci_iounmap(pdsc->pdev, bars[i].vaddr);
@@ -293,7 +298,7 @@ err_out_stop:
 err_out_teardown:
 	pdsc_teardown(pdsc, PDSC_TEARDOWN_REMOVING);
 err_out_unmap_bars:
-	del_timer_sync(&pdsc->wdtimer);
+	timer_shutdown_sync(&pdsc->wdtimer);
 	if (pdsc->wq)
 		destroy_workqueue(pdsc->wq);
 	mutex_destroy(&pdsc->config_lock);
@@ -420,7 +425,7 @@ static void pdsc_remove(struct pci_dev *pdev)
 		 */
 		pdsc_sriov_configure(pdev, 0);
 
-		del_timer_sync(&pdsc->wdtimer);
+		timer_shutdown_sync(&pdsc->wdtimer);
 		if (pdsc->wq)
 			destroy_workqueue(pdsc->wq);
 
@@ -433,7 +438,6 @@ static void pdsc_remove(struct pci_dev *pdev)
 		mutex_destroy(&pdsc->config_lock);
 		mutex_destroy(&pdsc->devcmd_lock);
 
-		pci_free_irq_vectors(pdev);
 		pdsc_unmap_bars(pdsc);
 		pci_release_regions(pdev);
 	}
@@ -445,12 +449,76 @@ static void pdsc_remove(struct pci_dev *pdev)
 	devlink_free(dl);
 }
 
+static void pdsc_stop_health_thread(struct pdsc *pdsc)
+{
+	timer_shutdown_sync(&pdsc->wdtimer);
+	if (pdsc->health_work.func)
+		cancel_work_sync(&pdsc->health_work);
+}
+
+static void pdsc_restart_health_thread(struct pdsc *pdsc)
+{
+	timer_setup(&pdsc->wdtimer, pdsc_wdtimer_cb, 0);
+	mod_timer(&pdsc->wdtimer, jiffies + 1);
+}
+
+void pdsc_reset_prepare(struct pci_dev *pdev)
+{
+	struct pdsc *pdsc = pci_get_drvdata(pdev);
+
+	pdsc_stop_health_thread(pdsc);
+	pdsc_fw_down(pdsc);
+
+	pdsc_unmap_bars(pdsc);
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+}
+
+void pdsc_reset_done(struct pci_dev *pdev)
+{
+	struct pdsc *pdsc = pci_get_drvdata(pdev);
+	struct device *dev = pdsc->dev;
+	int err;
+
+	err = pci_enable_device(pdev);
+	if (err) {
+		dev_err(dev, "Cannot enable PCI device: %pe\n", ERR_PTR(err));
+		return;
+	}
+	pci_set_master(pdev);
+
+	if (!pdev->is_virtfn) {
+		pcie_print_link_status(pdsc->pdev);
+
+		err = pci_request_regions(pdsc->pdev, PDS_CORE_DRV_NAME);
+		if (err) {
+			dev_err(pdsc->dev, "Cannot request PCI regions: %pe\n",
+				ERR_PTR(err));
+			return;
+		}
+
+		err = pdsc_map_bars(pdsc);
+		if (err)
+			return;
+	}
+
+	pdsc_fw_up(pdsc);
+	pdsc_restart_health_thread(pdsc);
+}
+
+static const struct pci_error_handlers pdsc_err_handler = {
+	/* FLR handling */
+	.reset_prepare      = pdsc_reset_prepare,
+	.reset_done         = pdsc_reset_done,
+};
+
 static struct pci_driver pdsc_driver = {
 	.name = PDS_CORE_DRV_NAME,
 	.id_table = pdsc_id_table,
 	.probe = pdsc_probe,
 	.remove = pdsc_remove,
 	.sriov_configure = pdsc_sriov_configure,
+	.err_handler = &pdsc_err_handler,
 };
 
 void *pdsc_get_pf_struct(struct pci_dev *vf_pdev)
diff --git a/drivers/net/ethernet/amd/sunlance.c b/drivers/net/ethernet/amd/sunlance.c
index 33bb539ad7..c78706d21a 100644
--- a/drivers/net/ethernet/amd/sunlance.c
+++ b/drivers/net/ethernet/amd/sunlance.c
@@ -1487,7 +1487,7 @@ static int sunlance_sbus_probe(struct platform_device *op)
 	return err;
 }
 
-static int sunlance_sbus_remove(struct platform_device *op)
+static void sunlance_sbus_remove(struct platform_device *op)
 {
 	struct lance_private *lp = platform_get_drvdata(op);
 	struct net_device *net_dev = lp->dev;
@@ -1497,8 +1497,6 @@ static int sunlance_sbus_remove(struct platform_device *op)
 	lance_free_hwresources(lp);
 
 	free_netdev(net_dev);
-
-	return 0;
 }
 
 static const struct of_device_id sunlance_sbus_match[] = {
@@ -1516,7 +1514,7 @@ static struct platform_driver sunlance_sbus_driver = {
 		.of_match_table = sunlance_sbus_match,
 	},
 	.probe		= sunlance_sbus_probe,
-	.remove		= sunlance_sbus_remove,
+	.remove_new	= sunlance_sbus_remove,
 };
 
 module_platform_driver(sunlance_sbus_driver);
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-platform.c b/drivers/net/ethernet/amd/xgbe/xgbe-platform.c
index 4d790a89fe..9131020d06 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-platform.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-platform.c
@@ -123,9 +123,7 @@
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_net.h>
-#include <linux/of_address.h>
 #include <linux/of_platform.h>
-#include <linux/of_device.h>
 #include <linux/clk.h>
 #include <linux/property.h>
 #include <linux/acpi.h>
@@ -135,17 +133,6 @@
 #include "xgbe-common.h"
 
 #ifdef CONFIG_ACPI
-static const struct acpi_device_id xgbe_acpi_match[];
-
-static struct xgbe_version_data *xgbe_acpi_vdata(struct xgbe_prv_data *pdata)
-{
-	const struct acpi_device_id *id;
-
-	id = acpi_match_device(xgbe_acpi_match, pdata->dev);
-
-	return id ? (struct xgbe_version_data *)id->driver_data : NULL;
-}
-
 static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
 {
 	struct device *dev = pdata->dev;
@@ -173,11 +160,6 @@ static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
 	return 0;
 }
 #else   /* CONFIG_ACPI */
-static struct xgbe_version_data *xgbe_acpi_vdata(struct xgbe_prv_data *pdata)
-{
-	return NULL;
-}
-
 static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
 {
 	return -EINVAL;
@@ -185,17 +167,6 @@ static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
 #endif  /* CONFIG_ACPI */
 
 #ifdef CONFIG_OF
-static const struct of_device_id xgbe_of_match[];
-
-static struct xgbe_version_data *xgbe_of_vdata(struct xgbe_prv_data *pdata)
-{
-	const struct of_device_id *id;
-
-	id = of_match_device(xgbe_of_match, pdata->dev);
-
-	return id ? (struct xgbe_version_data *)id->data : NULL;
-}
-
 static int xgbe_of_support(struct xgbe_prv_data *pdata)
 {
 	struct device *dev = pdata->dev;
@@ -244,11 +215,6 @@ static struct platform_device *xgbe_of_get_phy_pdev(struct xgbe_prv_data *pdata)
 	return phy_pdev;
 }
 #else   /* CONFIG_OF */
-static struct xgbe_version_data *xgbe_of_vdata(struct xgbe_prv_data *pdata)
-{
-	return NULL;
-}
-
 static int xgbe_of_support(struct xgbe_prv_data *pdata)
 {
 	return -EINVAL;
@@ -290,12 +256,6 @@ static struct platform_device *xgbe_get_phy_pdev(struct xgbe_prv_data *pdata)
 	return phy_pdev;
 }
 
-static struct xgbe_version_data *xgbe_get_vdata(struct xgbe_prv_data *pdata)
-{
-	return pdata->use_acpi ? xgbe_acpi_vdata(pdata)
-			       : xgbe_of_vdata(pdata);
-}
-
 static int xgbe_platform_probe(struct platform_device *pdev)
 {
 	struct xgbe_prv_data *pdata;
@@ -321,7 +281,7 @@ static int xgbe_platform_probe(struct platform_device *pdev)
 	pdata->use_acpi = dev->of_node ? 0 : 1;
 
 	/* Get the version data */
-	pdata->vdata = xgbe_get_vdata(pdata);
+	pdata->vdata = (struct xgbe_version_data *)device_get_match_data(dev);
 
 	phy_pdev = xgbe_get_phy_pdev(pdata);
 	if (!phy_pdev) {
@@ -512,7 +472,7 @@ err_alloc:
 	return ret;
 }
 
-static int xgbe_platform_remove(struct platform_device *pdev)
+static void xgbe_platform_remove(struct platform_device *pdev)
 {
 	struct xgbe_prv_data *pdata = platform_get_drvdata(pdev);
 
@@ -521,8 +481,6 @@ static int xgbe_platform_remove(struct platform_device *pdev)
 	platform_device_put(pdata->phy_platdev);
 
 	xgbe_free_pdata(pdata);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -615,7 +573,7 @@ static struct platform_driver xgbe_driver = {
 		.pm = &xgbe_platform_pm_ops,
 	},
 	.probe = xgbe_platform_probe,
-	.remove = xgbe_platform_remove,
+	.remove_new = xgbe_platform_remove,
 };
 
 int xgbe_platform_init(void)