fix(m5stack_core_s3): keep SPI init state on shared-bus SD unmount

Author: cursoragent

bsp/m5stack_core_s3/m5stack_core_s3.c

@@ -323,10 +323,13 @@ esp_err_t bsp_sdcard_unmount(void)
     ret |= esp_vfs_fat_sdcard_unmount(BSP_SD_MOUNT_POINT, bsp_sdcard);
     bsp_sdcard = NULL;
 
-    //TODO: Check if LCD initialized (when LCD deinit will be covered by BSP)
     if (spi_initialized) {
-        ret |= spi_bus_free(BSP_SDSPI_HOST);
-        spi_initialized = false;
+        esp_err_t spi_ret = spi_bus_free(BSP_SDSPI_HOST);
+        if (spi_ret == ESP_OK) {
+            spi_initialized = false;
+        } else if (spi_ret != ESP_ERR_INVALID_STATE) {
+            ret |= spi_ret;
+        }
     }
 
     return ret;