diff --git a/arch/loongarch/kernel/cacheinfo.c b/arch/loongarch/kernel/cacheinfo.c
index c7988f757281cbc22116286aad2921acd5b64c83..8e231b0d2cd6c9bce2aac348f9d0d2dea471c347 100644
--- a/arch/loongarch/kernel/cacheinfo.c
+++ b/arch/loongarch/kernel/cacheinfo.c
@@ -51,6 +51,12 @@ static void cache_cpumap_setup(unsigned int cpu)
 				continue;
 
 			sib_leaf = sib_cpu_ci->info_list + index;
+			/* SMT cores share all caches */
+			if (cpus_are_siblings(i, cpu)) {
+				cpumask_set_cpu(cpu, &sib_leaf->shared_cpu_map);
+				cpumask_set_cpu(i, &this_leaf->shared_cpu_map);
+			}
+			/* Node's cores share shared caches */
 			if (cache_leaves_are_shared(this_leaf, sib_leaf)) {
 				cpumask_set_cpu(cpu, &sib_leaf->shared_cpu_map);
 				cpumask_set_cpu(i, &this_leaf->shared_cpu_map);
diff --git a/arch/loongarch/mm/cache.c b/arch/loongarch/mm/cache.c
index 6be04d36ca0769658a2b52d25af50dd6ad7e07e0..f6cda2b5d7382754026a4eefa3591fc3ced57f84 100644
--- a/arch/loongarch/mm/cache.c
+++ b/arch/loongarch/mm/cache.c
@@ -63,6 +63,28 @@ static void flush_cache_leaf(unsigned int leaf)
 	} while (--nr_nodes > 0);
 }
 
+static void flush_cache_last_level(unsigned int leaf)
+{
+	u64 addr;
+	int i, j, nr_nodes, way_size;
+	struct cache_desc *cdesc = current_cpu_data.cache_leaves + leaf;
+
+	nr_nodes = loongson_sysconf.nr_nodes;
+
+	addr = CSR_DMW1_BASE;
+	iocsr_write8(0x1, 0x280);
+	way_size = cdesc->sets * cdesc->linesz;
+	do {
+		for (i = 0; i < (cdesc->ways * 3); i++) {
+			for (j = 0; j < (cdesc->sets); j++) {
+				READ_ONCE(*(u32 *)addr);
+				addr += cdesc->linesz;
+			}
+		}
+		addr += 0x100000000000;
+	} while (--nr_nodes > 0);
+}
+
 asmlinkage __visible void __flush_cache_all(void)
 {
 	int leaf;
@@ -71,7 +93,7 @@ asmlinkage __visible void __flush_cache_all(void)
 
 	leaf = cache_present - 1;
 	if (cache_inclusive(cdesc + leaf)) {
-		flush_cache_leaf(leaf);
+		flush_cache_last_level(leaf);
 		return;
 	}
 
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index c80b5aa7628ae9ecb243e19e3521f3606d5853d7..0cec54f2b2add1df0bc1e77e3bf4abad3b6cd537 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -4686,6 +4686,9 @@ static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
 	if (data->suspend_count++)
 		return 0;
 
+#ifdef CONFIG_LOONGARCH
+	mdelay(1);
+#endif
 	spin_lock_irq(&data->txlock);
 	if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
 		set_bit(BTUSB_SUSPENDING, &data->flags);
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 950288f20522ed3bce8385e04a01f2b3f5c8aba3..c813abc1345b90ce3b98086d1a791debd4d4077a 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2813,9 +2813,9 @@ static const struct pci_device_id azx_ids[] = {
 		AZX_DCAPS_NO_MSI | AZX_DCAPS_RIRB_PRE_DELAY | AZX_DCAPS_NO_64BIT },
 	/* Loongson HDAudio*/
 	{ PCI_VDEVICE(LOONGSON, PCI_DEVICE_ID_LOONGSON_HDA),
-	  .driver_data = AZX_DRIVER_LOONGSON },
+	  .driver_data = AZX_DRIVER_LOONGSON | AZX_DCAPS_NO_TCSEL},
 	{ PCI_VDEVICE(LOONGSON, PCI_DEVICE_ID_LOONGSON_HDMI),
-	  .driver_data = AZX_DRIVER_LOONGSON },
+	  .driver_data = AZX_DRIVER_LOONGSON | AZX_DCAPS_NO_TCSEL},
 	/* Hygon HDAudio */
 	{ PCI_VDEVICE(HYGON, PCI_DEVICE_ID_HYGON_18H_M05H_HDA),
 	  .driver_data = AZX_DRIVER_HYGON | AZX_DCAPS_POSFIX_LPIB | AZX_DCAPS_NO_MSI },