diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c
index 41b1434..988fc29 100644
--- a/drivers/resctrl/mpam_devices.c
+++ b/drivers/resctrl/mpam_devices.c
@@ -164,11 +164,17 @@ static void mpam_free_garbage(void)
 /*
  * Once mpam is enabled, new requestors cannot further reduce the available
  * partid. Assert that the size is fixed, and new requestors will be turned
- * away.
+ * away. This is needed when walking over structures sized by PARTID.
+ *
+ * During mpam_disable() these structures are not fixed, but the MSC state
+ * is still reset using whatever sizes have been discovered so far. As only
+ * PARTID 0 will be used after mpam_disable(), any race would be benign.
+ * Skip the check if a mpam_disable_reason has been set.
  */
 static void mpam_assert_partid_sizes_fixed(void)
 {
-	WARN_ON_ONCE(!partid_max_published);
+	if (!mpam_disable_reason)
+		WARN_ON_ONCE(!partid_max_published);
 }
 
 static u32 __mpam_read_reg(struct mpam_msc *msc, u16 reg)
@@ -728,10 +734,9 @@ static void mpam_enable_quirks(struct mpam_msc *msc)
  * Try and see what values stick in this bit. If we can write either value,
  * its probably not implemented by hardware.
  */
-static bool _mpam_ris_hw_probe_hw_nrdy(struct mpam_msc_ris *ris, u32 mon_reg)
+static bool mpam_ris_hw_probe_csu_nrdy(struct mpam_msc_ris *ris)
 {
-	u32 now;
-	u64 mon_sel;
+	u32 now, mon_sel, ctl_val;
 	bool can_set, can_clear;
 	struct mpam_msc *msc = ris->vmsc->msc;
 
@@ -740,23 +745,30 @@ static bool _mpam_ris_hw_probe_hw_nrdy(struct mpam_msc_ris *ris, u32 mon_reg)
 
 	mon_sel = FIELD_PREP(MSMON_CFG_MON_SEL_MON_SEL, 0) |
 		  FIELD_PREP(MSMON_CFG_MON_SEL_RIS, ris->ris_idx);
-	_mpam_write_monsel_reg(msc, mon_reg, mon_sel);
+	mpam_write_monsel_reg(msc, CFG_MON_SEL, mon_sel);
+
+	/* Hardware might ignore nrdy if it's not enabled */
+	ctl_val = MSMON_CFG_CSU_CTL_TYPE_CSU;
+	ctl_val |= MSMON_CFG_x_CTL_MATCH_PARTID;
+	ctl_val |= MSMON_CFG_x_CTL_MATCH_PMG;
+	ctl_val |= MSMON_CFG_x_CTL_EN;
+	mpam_write_monsel_reg(msc, CFG_CSU_FLT, 0);
+	mpam_write_monsel_reg(msc, CFG_CSU_CTL, ctl_val);
 
-	_mpam_write_monsel_reg(msc, mon_reg, MSMON___NRDY);
-	now = _mpam_read_monsel_reg(msc, mon_reg);
+	_mpam_write_monsel_reg(msc, MSMON_CSU, MSMON___NRDY);
+	now = _mpam_read_monsel_reg(msc, MSMON_CSU);
 	can_set = now & MSMON___NRDY;
 
-	_mpam_write_monsel_reg(msc, mon_reg, 0);
-	now = _mpam_read_monsel_reg(msc, mon_reg);
+	_mpam_write_monsel_reg(msc, MSMON_CSU, 0);
+	/* Configuration change to try and coax hardware into setting nrdy */
+	mpam_write_monsel_reg(msc, CFG_CSU_FLT, 0x1);
+	now = _mpam_read_monsel_reg(msc, MSMON_CSU);
 	can_clear = !(now & MSMON___NRDY);
 	mpam_mon_sel_unlock(msc);
 
 	return (!can_set || !can_clear);
 }
 
-#define mpam_ris_hw_probe_hw_nrdy(_ris, _mon_reg)			\
-	_mpam_ris_hw_probe_hw_nrdy(_ris, MSMON_##_mon_reg)
-
 static void mpam_ris_hw_probe(struct mpam_msc_ris *ris)
 {
 	int err;
@@ -873,20 +885,18 @@ static void mpam_ris_hw_probe(struct mpam_msc_ris *ris)
 					mpam_set_feature(mpam_feat_msmon_csu_xcl, props);
 
 				/* Is NRDY hardware managed? */
-				hw_managed = mpam_ris_hw_probe_hw_nrdy(ris, CSU);
-				if (hw_managed)
-					mpam_set_feature(mpam_feat_msmon_csu_hw_nrdy, props);
-			}
+				hw_managed = mpam_ris_hw_probe_csu_nrdy(ris);
 
-			/*
-			 * Accept the missing firmware property if NRDY appears
-			 * un-implemented.
-			 */
-			if (err && mpam_has_feature(mpam_feat_msmon_csu_hw_nrdy, props))
-				dev_err_once(dev, "Counters are not usable because not-ready timeout was not provided by firmware.");
+				/*
+				 * Accept the missing firmware property if NRDY appears
+				 * un-implemented.
+				 */
+				if (err && hw_managed)
+					dev_err_once(dev, "Counters are not usable because not-ready timeout was not provided by firmware.");
+			}
 		}
 		if (FIELD_GET(MPAMF_MSMON_IDR_MSMON_MBWU, msmon_features)) {
-			bool has_long, hw_managed;
+			bool has_long;
 			u32 mbwumon_idr = mpam_read_partsel_reg(msc, MBWUMON_IDR);
 
 			props->num_mbwu_mon = FIELD_GET(MPAMF_MBWUMON_IDR_NUM_MON, mbwumon_idr);
@@ -905,16 +915,6 @@ static void mpam_ris_hw_probe(struct mpam_msc_ris *ris)
 				} else {
 					mpam_set_feature(mpam_feat_msmon_mbwu_31counter, props);
 				}
-
-				/* Is NRDY hardware managed? */
-				hw_managed = mpam_ris_hw_probe_hw_nrdy(ris, MBWU);
-				if (hw_managed)
-					mpam_set_feature(mpam_feat_msmon_mbwu_hw_nrdy, props);
-
-				/*
-				 * Don't warn about any missing firmware property for
-				 * MBWU NRDY - it doesn't make any sense!
-				 */
 			}
 		}
 	}
@@ -1197,7 +1197,6 @@ static void __ris_msmon_read(void *arg)
 	bool reset_on_next_read = false;
 	struct mpam_msc_ris *ris = m->ris;
 	struct msmon_mbwu_state *mbwu_state;
-	struct mpam_props *rprops = &ris->props;
 	struct mpam_msc *msc = m->ris->vmsc->msc;
 	u32 mon_sel, ctl_val, flt_val, cur_ctl, cur_flt;
 
@@ -1253,8 +1252,7 @@ static void __ris_msmon_read(void *arg)
 	switch (m->type) {
 	case mpam_feat_msmon_csu:
 		now = mpam_read_monsel_reg(msc, CSU);
-		if (mpam_has_feature(mpam_feat_msmon_csu_hw_nrdy, rprops))
-			nrdy = now & MSMON___NRDY;
+		nrdy = now & MSMON___NRDY;
 		now = FIELD_GET(MSMON___VALUE, now);
 
 		if (mpam_has_quirk(IGNORE_CSU_NRDY, msc) && m->waited_timeout)
@@ -1266,8 +1264,7 @@ static void __ris_msmon_read(void *arg)
 	case mpam_feat_msmon_mbwu_63counter:
 		if (m->type != mpam_feat_msmon_mbwu_31counter) {
 			now = mpam_msc_read_mbwu_l(msc);
-			if (mpam_has_feature(mpam_feat_msmon_mbwu_hw_nrdy, rprops))
-				nrdy = now & MSMON___L_NRDY;
+			nrdy = now & MSMON___L_NRDY;
 
 			if (m->type == mpam_feat_msmon_mbwu_63counter)
 				now = FIELD_GET(MSMON___LWD_VALUE, now);
@@ -1275,8 +1272,7 @@ static void __ris_msmon_read(void *arg)
 				now = FIELD_GET(MSMON___L_VALUE, now);
 		} else {
 			now = mpam_read_monsel_reg(msc, MBWU);
-			if (mpam_has_feature(mpam_feat_msmon_mbwu_hw_nrdy, rprops))
-				nrdy = now & MSMON___NRDY;
+			nrdy = now & MSMON___NRDY;
 			now = FIELD_GET(MSMON___VALUE, now);
 		}
 
@@ -2585,6 +2581,9 @@ static void __destroy_component_cfg(struct mpam_component *comp)
 
 	lockdep_assert_held(&mpam_list_lock);
 
+	if (!comp->cfg)
+		return;
+
 	add_to_garbage(comp->cfg);
 	list_for_each_entry(vmsc, &comp->vmsc, comp_list) {
 		msc = vmsc->msc;
diff --git a/drivers/resctrl/mpam_internal.h b/drivers/resctrl/mpam_internal.h
index 1914aef..04d1a59 100644
--- a/drivers/resctrl/mpam_internal.h
+++ b/drivers/resctrl/mpam_internal.h
@@ -181,14 +181,12 @@ enum mpam_device_features {
 	mpam_feat_msmon_csu,
 	mpam_feat_msmon_csu_capture,
 	mpam_feat_msmon_csu_xcl,
-	mpam_feat_msmon_csu_hw_nrdy,
 	mpam_feat_msmon_mbwu,
 	mpam_feat_msmon_mbwu_31counter,
 	mpam_feat_msmon_mbwu_44counter,
 	mpam_feat_msmon_mbwu_63counter,
 	mpam_feat_msmon_mbwu_capture,
 	mpam_feat_msmon_mbwu_rwbw,
-	mpam_feat_msmon_mbwu_hw_nrdy,
 	mpam_feat_partid_nrw,
 	MPAM_FEATURE_LAST
 };