SCSI misc on 20251214

The only core fix is in doc; all the others are in drivers, with the
 biggest impacts in libsas being the rollback on error handling and in
 ufs coming from a couple of error handling fixes, one causing a crash
 if it's activated before scanning and the other fixing W-LUN
 resumption.
 
 Signed-off-by: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "The only core fix is in doc; all the others are in drivers, with the
  biggest impacts in libsas being the rollback on error handling and in
  ufs coming from a couple of error handling fixes, one causing a crash
  if it's activated before scanning and the other fixing W-LUN
  resumption"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: qcom: Fix confusing cleanup.h syntax
  scsi: libsas: Add rollback handling when an error occurs
  scsi: device_handler: Return error pointer in scsi_dh_attached_handler_name()
  scsi: ufs: core: Fix a deadlock in the frequency scaling code
  scsi: ufs: core: Fix an error handler crash
  scsi: Revert "scsi: libsas: Fix exp-attached device scan after probe failure scanned in again after probe failed"
  scsi: ufs: core: Fix RPMB link error by reversing Kconfig dependencies
  scsi: qla4xxx: Use time conversion macros
  scsi: qla2xxx: Enable/disable IRQD_NO_BALANCING during reset
  scsi: ipr: Enable/disable IRQD_NO_BALANCING during reset
  scsi: imm: Fix use-after-free bug caused by unfinished delayed work
  scsi: target: sbp: Remove KMSG_COMPONENT macro
  scsi: core: Correct documentation for scsi_device_quiesce()
  scsi: mpi3mr: Prevent duplicate SAS/SATA device entries in channel 1
  scsi: target: Reset t_task_cdb pointer in error case
  scsi: ufs: core: Fix EH failure after W-LUN resume error

drivers/md/dm-mpath.c

@@ -950,6 +950,19 @@ static struct pgpath *parse_path(struct dm_arg_set *as, struct path_selector *ps
 
 	q = bdev_get_queue(p->path.dev->bdev);
 	attached_handler_name = scsi_dh_attached_handler_name(q, GFP_KERNEL);
+	if (IS_ERR(attached_handler_name)) {
+		if (PTR_ERR(attached_handler_name) == -ENODEV) {
+			if (m->hw_handler_name) {
+				DMERR("hardware handlers are only allowed for SCSI devices");
+				kfree(m->hw_handler_name);
+				m->hw_handler_name = NULL;
+			}
+			attached_handler_name = NULL;
+		} else {
+			r = PTR_ERR(attached_handler_name);
+			goto bad;
+		}
+	}
 	if (attached_handler_name || m->hw_handler_name) {
 		INIT_DELAYED_WORK(&p->activate_path, activate_path_work);
 		r = setup_scsi_dh(p->path.dev->bdev, m, &attached_handler_name, &ti->error);

drivers/misc/Kconfig

@@ -106,7 +106,6 @@ config PHANTOM
 
 config RPMB
 	tristate "RPMB partition interface"
-	depends on MMC || SCSI_UFSHCD
 	help
 	  Unified RPMB unit interface for RPMB capable devices such as eMMC and
 	  UFS. Provides interface for in-kernel security controllers to access

drivers/scsi/imm.c

@@ -1260,6 +1260,7 @@ static void imm_detach(struct parport *pb)
 	imm_struct *dev;
 	list_for_each_entry(dev, &imm_hosts, list) {
 		if (dev->dev->port == pb) {
+			disable_delayed_work_sync(&dev->imm_tq);
 			list_del_init(&dev->list);
 			scsi_remove_host(dev->host);
 			scsi_host_put(dev->host);

drivers/scsi/ipr.c

@@ -61,8 +61,8 @@
 #include <linux/hdreg.h>
 #include <linux/reboot.h>
 #include <linux/stringify.h>
+#include <linux/irq.h>
 #include <asm/io.h>
-#include <asm/irq.h>
 #include <asm/processor.h>
 #include <scsi/scsi.h>
 #include <scsi/scsi_host.h>
@@ -7843,6 +7843,30 @@ static int ipr_dump_mailbox_wait(struct ipr_cmnd *ipr_cmd)
 	return IPR_RC_JOB_RETURN;
 }
 
+/**
+ * ipr_set_affinity_nobalance
+ * @ioa_cfg:	ipr_ioa_cfg struct for an ipr device
+ * @flag:	bool
+ *	true: ensable "IRQ_NO_BALANCING" bit for msix interrupt
+ *	false: disable "IRQ_NO_BALANCING" bit for msix interrupt
+ * Description: This function will be called to disable/enable
+ *	"IRQ_NO_BALANCING" to avoid irqbalance daemon
+ *	kicking in during adapter reset.
+ **/
+static void ipr_set_affinity_nobalance(struct ipr_ioa_cfg *ioa_cfg, bool flag)
+{
+	int irq, i;
+
+	for (i = 0; i < ioa_cfg->nvectors; i++) {
+		irq = pci_irq_vector(ioa_cfg->pdev, i);
+
+		if (flag)
+			irq_set_status_flags(irq, IRQ_NO_BALANCING);
+		else
+			irq_clear_status_flags(irq, IRQ_NO_BALANCING);
+	}
+}
+
 /**
  * ipr_reset_restore_cfg_space - Restore PCI config space.
  * @ipr_cmd:	ipr command struct
@@ -7866,6 +7890,7 @@ static int ipr_reset_restore_cfg_space(struct ipr_cmnd *ipr_cmd)
 		return IPR_RC_JOB_CONTINUE;
 	}
 
+	ipr_set_affinity_nobalance(ioa_cfg, false);
 	ipr_fail_all_ops(ioa_cfg);
 
 	if (ioa_cfg->sis64) {
@@ -7945,6 +7970,7 @@ static int ipr_reset_start_bist(struct ipr_cmnd *ipr_cmd)
 		rc = pci_write_config_byte(ioa_cfg->pdev, PCI_BIST, PCI_BIST_START);
 
 	if (rc == PCIBIOS_SUCCESSFUL) {
+		ipr_set_affinity_nobalance(ioa_cfg, true);
 		ipr_cmd->job_step = ipr_reset_bist_done;
 		ipr_reset_start_timer(ipr_cmd, IPR_WAIT_FOR_BIST_TIMEOUT);
 		rc = IPR_RC_JOB_RETURN;

drivers/scsi/libsas/sas_init.c

@@ -141,6 +141,7 @@ Undo_event_q:
 Undo_ports:
 	sas_unregister_ports(sas_ha);
 Undo_phys:
+	sas_unregister_phys(sas_ha);
 
 	return error;
 }

drivers/scsi/libsas/sas_internal.h

@@ -54,6 +54,7 @@ void sas_unregister_dev(struct asd_sas_port *port, struct domain_device *dev);
 void sas_scsi_recover_host(struct Scsi_Host *shost);
 
 int  sas_register_phys(struct sas_ha_struct *sas_ha);
+void sas_unregister_phys(struct sas_ha_struct *sas_ha);
 
 struct asd_sas_event *sas_alloc_event(struct asd_sas_phy *phy, gfp_t gfp_flags);
 void sas_free_event(struct asd_sas_event *event);
@@ -145,20 +146,6 @@ static inline void sas_fail_probe(struct domain_device *dev, const char *func, i
 		func, dev->parent ? "exp-attached" :
 		"direct-attached",
 		SAS_ADDR(dev->sas_addr), err);
-
-	/*
-	 * If the device probe failed, the expander phy attached address
-	 * needs to be reset so that the phy will not be treated as flutter
-	 * in the next revalidation
-	 */
-	if (dev->parent && !dev_is_expander(dev->dev_type)) {
-		struct sas_phy *phy = dev->phy;
-		struct domain_device *parent = dev->parent;
-		struct ex_phy *ex_phy = &parent->ex_dev.ex_phy[phy->number];
-
-		memset(ex_phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
-	}
-
 	sas_unregister_dev(dev->port, dev);
 }
 

drivers/scsi/libsas/sas_phy.c

@@ -116,6 +116,7 @@ static void sas_phye_shutdown(struct work_struct *work)
 int sas_register_phys(struct sas_ha_struct *sas_ha)
 {
 	int i;
+	int err;
 
 	/* Now register the phys. */
 	for (i = 0; i < sas_ha->num_phys; i++) {
@@ -132,8 +133,10 @@ int sas_register_phys(struct sas_ha_struct *sas_ha)
 		phy->frame_rcvd_size = 0;
 
 		phy->phy = sas_phy_alloc(&sas_ha->shost->shost_gendev, i);
-		if (!phy->phy)
+		if (!phy->phy) {
-			return -ENOMEM;
+			err = -ENOMEM;
+			goto rollback;
+		}
 
 		phy->phy->identify.initiator_port_protocols =
 			phy->iproto;
@@ -146,10 +149,34 @@ int sas_register_phys(struct sas_ha_struct *sas_ha)
 		phy->phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
 		phy->phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
 
-		sas_phy_add(phy->phy);
+		err = sas_phy_add(phy->phy);
+		if (err) {
+			sas_phy_free(phy->phy);
+			goto rollback;
+		}
 	}
 
 	return 0;
+rollback:
+	for (i-- ; i >= 0 ; i--) {
+		struct asd_sas_phy *phy = sas_ha->sas_phy[i];
+
+		sas_phy_delete(phy->phy);
+		sas_phy_free(phy->phy);
+	}
+	return err;
+}
+
+void sas_unregister_phys(struct sas_ha_struct *sas_ha)
+{
+	int i;
+
+	for (i = 0 ; i < sas_ha->num_phys ; i++) {
+		struct asd_sas_phy *phy = sas_ha->sas_phy[i];
+
+		sas_phy_delete(phy->phy);
+		sas_phy_free(phy->phy);
+	}
 }
 
 const work_func_t sas_phy_event_fns[PHY_NUM_EVENTS] = {

drivers/scsi/mpi3mr/mpi3mr.h

@@ -56,8 +56,8 @@ extern struct list_head mrioc_list;
 extern int prot_mask;
 extern atomic64_t event_counter;
 
-#define MPI3MR_DRIVER_VERSION	"8.15.0.5.50"
+#define MPI3MR_DRIVER_VERSION	"8.15.0.5.51"
-#define MPI3MR_DRIVER_RELDATE	"12-August-2025"
+#define MPI3MR_DRIVER_RELDATE	"18-November-2025"
 
 #define MPI3MR_DRIVER_NAME	"mpi3mr"
 #define MPI3MR_DRIVER_LICENSE	"GPL"

drivers/scsi/mpi3mr/mpi3mr_os.c

@@ -1184,6 +1184,8 @@ static void mpi3mr_update_tgtdev(struct mpi3mr_ioc *mrioc,
 	if (is_added == true)
 		tgtdev->io_throttle_enabled =
 		    (flags & MPI3_DEVICE0_FLAGS_IO_THROTTLING_REQUIRED) ? 1 : 0;
+	if (!mrioc->sas_transport_enabled)
+		tgtdev->non_stl = 1;
 
 	switch (flags & MPI3_DEVICE0_FLAGS_MAX_WRITE_SAME_MASK) {
 	case MPI3_DEVICE0_FLAGS_MAX_WRITE_SAME_256_LB:
@@ -4844,7 +4846,7 @@ static int mpi3mr_target_alloc(struct scsi_target *starget)
 	spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
 	if (starget->channel == mrioc->scsi_device_channel) {
 		tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
-		if (tgt_dev && !tgt_dev->is_hidden) {
+		if (tgt_dev && !tgt_dev->is_hidden && tgt_dev->non_stl) {
 			scsi_tgt_priv_data->starget = starget;
 			scsi_tgt_priv_data->dev_handle = tgt_dev->dev_handle;
 			scsi_tgt_priv_data->perst_id = tgt_dev->perst_id;

drivers/scsi/qla2xxx/qla_os.c

@@ -17,6 +17,7 @@
 #include <linux/crash_dump.h>
 #include <linux/trace_events.h>
 #include <linux/trace.h>
+#include <linux/irq.h>
 
 #include <scsi/scsi_tcq.h>
 #include <scsi/scsicam.h>
@@ -7776,6 +7777,31 @@ static void qla_pci_error_cleanup(scsi_qla_host_t *vha)
 }
 
 
+/**
+ * qla2xxx_set_affinity_nobalance
+ * @pdev: pci_dev struct for a qla2xxx device
+ * @flag: bool
+ * true: enable "IRQ_NO_BALANCING" bit for msix interrupt
+ * false: disable "IRQ_NO_BALANCING" bit for msix interrupt
+ * Description: This function will be called to disable/enable
+ * "IRQ_NO_BALANCING" to avoid irqbalance daemon
+ * kicking in during adapter reset.
+ **/
+
+static void qla2xxx_set_affinity_nobalance(struct pci_dev *pdev, bool flag)
+{
+	int irq, i;
+
+	for (i = 0; i < QLA_BASE_VECTORS; i++) {
+		irq = pci_irq_vector(pdev, i);
+
+		if (flag)
+			irq_set_status_flags(irq, IRQ_NO_BALANCING);
+		else
+			irq_clear_status_flags(irq, IRQ_NO_BALANCING);
+	}
+}
+
 static pci_ers_result_t
 qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
 {
@@ -7794,6 +7820,8 @@ qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
 		goto out;
 	}
 
+	qla2xxx_set_affinity_nobalance(pdev, false);
+
 	switch (state) {
 	case pci_channel_io_normal:
 		qla_pci_set_eeh_busy(vha);
@@ -7930,6 +7958,8 @@ exit_slot_reset:
 	ql_dbg(ql_dbg_aer, base_vha, 0x900e,
 	    "Slot Reset returning %x.\n", ret);
 
+	qla2xxx_set_affinity_nobalance(pdev, true);
+
 	return ret;
 }
 

drivers/scsi/qla4xxx/ql4_nx.c

@@ -1552,7 +1552,7 @@ static int qla4_82xx_cmdpeg_ready(struct scsi_qla_host *ha, int pegtune_val)
 			    (val == PHAN_INITIALIZE_ACK))
 				return 0;
 			set_current_state(TASK_UNINTERRUPTIBLE);
-			schedule_timeout(500);
+			schedule_timeout(msecs_to_jiffies(500));
 
 		} while (--retries);
 

drivers/scsi/scsi_dh.c

@@ -353,7 +353,8 @@ EXPORT_SYMBOL_GPL(scsi_dh_attach);
  *      that may have a device handler attached
  * @gfp - the GFP mask used in the kmalloc() call when allocating memory
  *
- * Returns name of attached handler, NULL if no handler is attached.
+ * Returns name of attached handler, NULL if no handler is attached, or
+ * and error pointer if an error occurred.
  * Caller must take care to free the returned string.
  */
 const char *scsi_dh_attached_handler_name(struct request_queue *q, gfp_t gfp)
@@ -363,10 +364,11 @@ const char *scsi_dh_attached_handler_name(struct request_queue *q, gfp_t gfp)
 
 	sdev = scsi_device_from_queue(q);
 	if (!sdev)
-		return NULL;
+		return ERR_PTR(-ENODEV);
 
 	if (sdev->handler)
-		handler_name = kstrdup(sdev->handler->name, gfp);
+		handler_name = kstrdup(sdev->handler->name, gfp) ? :
+			       ERR_PTR(-ENOMEM);
 	put_device(&sdev->sdev_gendev);
 	return handler_name;
 }

drivers/scsi/scsi_lib.c

@@ -2801,7 +2801,7 @@ EXPORT_SYMBOL_GPL(sdev_evt_send_simple);
  *
  *	Must be called with user context, may sleep.
  *
- *	Returns zero if unsuccessful or an error if not.
+ *	Returns zero if successful or an error if not.
  */
 int
 scsi_device_quiesce(struct scsi_device *sdev)

drivers/target/sbp/sbp_target.c

@@ -5,8 +5,7 @@
  * Copyright (C) 2011  Chris Boot <bootc@bootc.net>
  */
 
-#define KMSG_COMPONENT "sbp_target"
+#define pr_fmt(fmt) "sbp_target: " fmt
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
 #include <linux/kernel.h>
 #include <linux/module.h>

drivers/target/target_core_transport.c

@@ -1524,6 +1524,7 @@ target_cmd_init_cdb(struct se_cmd *cmd, unsigned char *cdb, gfp_t gfp)
 	if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) {
 		cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), gfp);
 		if (!cmd->t_task_cdb) {
+			cmd->t_task_cdb = &cmd->__t_task_cdb[0];
 			pr_err("Unable to allocate cmd->t_task_cdb"
 				" %u > sizeof(cmd->__t_task_cdb): %lu ops\n",
 				scsi_command_size(cdb),

drivers/ufs/Kconfig

@@ -6,6 +6,7 @@
 menuconfig SCSI_UFSHCD
 	tristate "Universal Flash Storage Controller"
 	depends on SCSI && SCSI_DMA
+	depends on RPMB || !RPMB
 	select PM_DEVFREQ
 	select DEVFREQ_GOV_SIMPLE_ONDEMAND
 	select NLS

drivers/ufs/core/ufshcd.c

@@ -1455,15 +1455,14 @@ out:
 static void ufshcd_clock_scaling_unprepare(struct ufs_hba *hba, int err)
 {
 	up_write(&hba->clk_scaling_lock);
+	mutex_unlock(&hba->wb_mutex);
+	blk_mq_unquiesce_tagset(&hba->host->tag_set);
+	mutex_unlock(&hba->host->scan_mutex);
 
 	/* Enable Write Booster if current gear requires it else disable it */
 	if (ufshcd_enable_wb_if_scaling_up(hba) && !err)
 		ufshcd_wb_toggle(hba, hba->pwr_info.gear_rx >= hba->clk_scaling.wb_gear);
 
-	mutex_unlock(&hba->wb_mutex);
-
-	blk_mq_unquiesce_tagset(&hba->host->tag_set);
-	mutex_unlock(&hba->host->scan_mutex);
 	ufshcd_release(hba);
 }
 
@@ -6504,6 +6503,11 @@ static void ufshcd_clk_scaling_suspend(struct ufs_hba *hba, bool suspend)
 
 static void ufshcd_err_handling_prepare(struct ufs_hba *hba)
 {
+	/*
+	 * A WLUN resume failure could potentially lead to the HBA being
+	 * runtime suspended, so take an extra reference on hba->dev.
+	 */
+	pm_runtime_get_sync(hba->dev);
 	ufshcd_rpm_get_sync(hba);
 	if (pm_runtime_status_suspended(&hba->ufs_device_wlun->sdev_gendev) ||
 	    hba->is_sys_suspended) {
@@ -6543,6 +6547,7 @@ static void ufshcd_err_handling_unprepare(struct ufs_hba *hba)
 	if (ufshcd_is_clkscaling_supported(hba))
 		ufshcd_clk_scaling_suspend(hba, false);
 	ufshcd_rpm_put(hba);
+	pm_runtime_put(hba->dev);
 }
 
 static inline bool ufshcd_err_handling_should_stop(struct ufs_hba *hba)
@@ -6557,28 +6562,42 @@ static inline bool ufshcd_err_handling_should_stop(struct ufs_hba *hba)
 #ifdef CONFIG_PM
 static void ufshcd_recover_pm_error(struct ufs_hba *hba)
 {
+	struct scsi_target *starget = hba->ufs_device_wlun->sdev_target;
 	struct Scsi_Host *shost = hba->host;
 	struct scsi_device *sdev;
 	struct request_queue *q;
-	int ret;
+	bool resume_sdev_queues = false;
 
 	hba->is_sys_suspended = false;
-	/*
-	 * Set RPM status of wlun device to RPM_ACTIVE,
-	 * this also clears its runtime error.
-	 */
-	ret = pm_runtime_set_active(&hba->ufs_device_wlun->sdev_gendev);
 
-	/* hba device might have a runtime error otherwise */
+	/*
-	if (ret)
+	 * Ensure the parent's error status is cleared before proceeding
-		ret = pm_runtime_set_active(hba->dev);
+	 * to the child, as the parent must be active to activate the child.
+	 */
+	if (hba->dev->power.runtime_error) {
+		/* hba->dev has no functional parent thus simplily set RPM_ACTIVE */
+		pm_runtime_set_active(hba->dev);
+		resume_sdev_queues = true;
+	}
+
+	if (hba->ufs_device_wlun->sdev_gendev.power.runtime_error) {
+		/*
+		 * starget, parent of wlun, might be suspended if wlun resume failed.
+		 * Make sure parent is resumed before set child (wlun) active.
+		 */
+		pm_runtime_get_sync(&starget->dev);
+		pm_runtime_set_active(&hba->ufs_device_wlun->sdev_gendev);
+		pm_runtime_put_sync(&starget->dev);
+		resume_sdev_queues = true;
+	}
+
 	/*
 	 * If wlun device had runtime error, we also need to resume those
 	 * consumer scsi devices in case any of them has failed to be
 	 * resumed due to supplier runtime resume failure. This is to unblock
 	 * blk_queue_enter in case there are bios waiting inside it.
 	 */
-	if (!ret) {
+	if (resume_sdev_queues) {
 		shost_for_each_device(sdev, shost) {
 			q = sdev->request_queue;
 			if (q->dev && (q->rpm_status == RPM_SUSPENDED ||
@@ -6679,19 +6698,22 @@ static void ufshcd_err_handler(struct work_struct *work)
 		 hba->saved_uic_err, hba->force_reset,
 		 ufshcd_is_link_broken(hba) ? "; link is broken" : "");
 
-	/*
+	if (hba->ufs_device_wlun) {
-	 * Use ufshcd_rpm_get_noresume() here to safely perform link recovery
+		/*
-	 * even if an error occurs during runtime suspend or runtime resume.
+		 * Use ufshcd_rpm_get_noresume() here to safely perform link
-	 * This avoids potential deadlocks that could happen if we tried to
+		 * recovery even if an error occurs during runtime suspend or
-	 * resume the device while a PM operation is already in progress.
+		 * runtime resume. This avoids potential deadlocks that could
-	 */
+		 * happen if we tried to resume the device while a PM operation
-	ufshcd_rpm_get_noresume(hba);
+		 * is already in progress.
-	if (hba->pm_op_in_progress) {
+		 */
-		ufshcd_link_recovery(hba);
+		ufshcd_rpm_get_noresume(hba);
+		if (hba->pm_op_in_progress) {
+			ufshcd_link_recovery(hba);
+			ufshcd_rpm_put(hba);
+			return;
+		}
 		ufshcd_rpm_put(hba);
-		return;
 	}
-	ufshcd_rpm_put(hba);
 
 	down(&hba->host_sem);
 	spin_lock_irqsave(hba->host->host_lock, flags);

drivers/ufs/host/ufs-qcom.c

@@ -1769,10 +1769,9 @@ static void ufs_qcom_dump_testbus(struct ufs_hba *hba)
 {
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
 	int i, j, nminor = 0, testbus_len = 0;
-	u32 *testbus __free(kfree) = NULL;
 	char *prefix;
 
-	testbus = kmalloc_array(256, sizeof(u32), GFP_KERNEL);
+	u32 *testbus __free(kfree) = kmalloc_array(256, sizeof(u32), GFP_KERNEL);
 	if (!testbus)
 		return;
 
@@ -1794,13 +1793,12 @@ static void ufs_qcom_dump_testbus(struct ufs_hba *hba)
 static int ufs_qcom_dump_regs(struct ufs_hba *hba, size_t offset, size_t len,
 			      const char *prefix, void __iomem *base)
 {
-	u32 *regs __free(kfree) = NULL;
 	size_t pos;
 
 	if (offset % 4 != 0 || len % 4 != 0)
 		return -EINVAL;
 
-	regs = kzalloc(len, GFP_ATOMIC);
+	u32 *regs __free(kfree) = kzalloc(len, GFP_ATOMIC);
 	if (!regs)
 		return -ENOMEM;