diff --git a/components/bt/common/ble_log/src/ble_log_lbm.c b/components/bt/common/ble_log/src/ble_log_lbm.c
index 9b1dd64c92c..7bed717b2c9 100644
--- a/components/bt/common/ble_log/src/ble_log_lbm.c
+++ b/components/bt/common/ble_log/src/ble_log_lbm.c
@@ -515,6 +515,14 @@ bool ble_log_enable(bool enable)
 
 void ble_log_flush(void)
 {
+    /* Prevent concurrent flush — two concurrent callers would deadlock on
+     * the ref_count spin-wait (both hold a ref, both wait for ref_count <= 1).
+     * Second caller returns immediately instead of deadlocking. */
+    static volatile bool flush_in_progress = false;
+    if (__atomic_test_and_set(&flush_in_progress, __ATOMIC_ACQUIRE)) {
+        return;
+    }
+
     BLE_LOG_REF_COUNT_ACQUIRE(&lbm_ref_count);
     if (!lbm_inited) {
         goto deref;
@@ -535,7 +543,7 @@ void ble_log_flush(void)
     bool lbm_enabled_copy = lbm_enabled;
     lbm_enabled = false;
     uint32_t time_waited = 0;
-    while (lbm_ref_count > 1) {
+    while (__atomic_load_n(&lbm_ref_count, __ATOMIC_ACQUIRE) > 1) {
         vTaskDelay(pdMS_TO_TICKS(1));
         BLE_LOG_ASSERT(time_waited++ < 1000);
     }
@@ -593,6 +601,7 @@ void ble_log_flush(void)
 
 deref:
     BLE_LOG_REF_COUNT_RELEASE(&lbm_ref_count);
+    __atomic_clear(&flush_in_progress, __ATOMIC_RELEASE);
 }
 
 BLE_LOG_IRAM_ATTR
diff --git a/components/bt/common/ble_log/src/prph/ble_log_prph_spi_master_dma.c b/components/bt/common/ble_log/src/prph/ble_log_prph_spi_master_dma.c
index 41f7975938c..293f70b2c63 100644
--- a/components/bt/common/ble_log/src/prph/ble_log_prph_spi_master_dma.c
+++ b/components/bt/common/ble_log/src/prph/ble_log_prph_spi_master_dma.c
@@ -97,12 +97,11 @@ void ble_log_prph_deinit(void)
 {
     prph_inited = false;
     if (dev_handle) {
-        /* Drain all queued transactions */
         if (spi_device_acquire_bus(dev_handle, portMAX_DELAY) == ESP_OK) {
             spi_device_release_bus(dev_handle);
-            spi_bus_remove_device(dev_handle);
-            dev_handle = NULL;
         }
+        spi_bus_remove_device(dev_handle);
+        dev_handle = NULL;
     }
 
     /* Note: We don't care if the bus has been inited or not */
diff --git a/components/bt/common/ble_log/src/prph/ble_log_prph_uart_dma.c b/components/bt/common/ble_log/src/prph/ble_log_prph_uart_dma.c
index 73c9792fabe..f21ff5f291c 100644
--- a/components/bt/common/ble_log/src/prph/ble_log_prph_uart_dma.c
+++ b/components/bt/common/ble_log/src/prph/ble_log_prph_uart_dma.c
@@ -18,6 +18,7 @@
 #include "esp_timer.h"
 #include "driver/uart.h"
 #include "driver/uart_vfs.h"
+#include "freertos/task.h"
 #endif /* BLE_LOG_PRPH_UART_DMA_REDIR */
 
 /* MACRO */
@@ -146,8 +147,9 @@ bool ble_log_prph_init(size_t trans_cnt)
 
     /* Initialize UART driver for redirection */
     if (!uart_is_driver_installed(UART_NUM_0)) {
-        uart_driver_install(UART_NUM_0, BLE_LOG_UART_RX_BUF_SIZE, 0, 0, NULL, 0);
-        uart_driver_inited = true;
+        if (uart_driver_install(UART_NUM_0, BLE_LOG_UART_RX_BUF_SIZE, 0, 0, NULL, 0) == ESP_OK) {
+            uart_driver_inited = true;
+        }
     }
     uart_vfs_dev_use_driver(UART_NUM_0);
 
@@ -285,6 +287,9 @@ BLE_LOG_IRAM_ATTR void ble_log_prph_send_trans(ble_log_prph_trans_t *trans)
 BLE_LOG_IRAM_ATTR BLE_LOG_STATIC
 void ble_log_redir_uart_tx_chars(const char *src, size_t len)
 {
+    if (BLE_LOG_IN_ISR() || xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED) {
+        return;
+    }
     xSemaphoreTake(redir_lbm->mutex, portMAX_DELAY);
     ble_log_lbm_stream_write(redir_lbm, BLE_LOG_SRC_REDIR,
                               (const uint8_t *)src, len);