Fix http client read return value

1.esp_tls: fail connection if esp_tls_conn_new() timeouts
https://gitlab.espressif.cn:6688/espressif/esp-idf/merge_requests/7397

2.esp32:panic: avoid access cache in panichandler

3.Sync https://gitlab.espressif.cn:6688/espressif/esp-idf/merge_requests/7152
Even if frame->exccause != PANIC_RSN_CACHEERR, it is possible that the cache error interrupt status is set. For example, this may happen due to an invalid cache access in the panic$
Check cache error interrupt status instead of frame->exccause to decide whether to do CPU reset or digital reset.
Also remove unnecessary esp_dport_access_int_pause from esp_cache_err_get_cpuid, since the panic handler already calls
esp_dport_access_int_abort on entry.

components/esp-tls/esp_tls.c

@@ -481,6 +481,7 @@ esp_tls_t *esp_tls_conn_new(const char *hostname, int hostlen, int port, const e
     }
     /* esp_tls_conn_new() API establishes connection in a blocking manner thus this loop ensures that esp_tls_conn_new()
        API returns only after connection is established unless there is an error*/
+    size_t start = xTaskGetTickCount();
     while (1) {
         int ret = esp_tls_low_level_conn(hostname, hostlen, port, cfg, tls);
         if (ret == 1) {
@@ -489,6 +490,14 @@ esp_tls_t *esp_tls_conn_new(const char *hostname, int hostlen, int port, const e
             esp_tls_conn_delete(tls);
             ESP_LOGE(TAG, "Failed to open new connection");
             return NULL;
+        } else if (ret == 0 && cfg->timeout_ms >= 0) {
+            size_t timeout_ticks = pdMS_TO_TICKS(cfg->timeout_ms);
+            uint32_t expired = xTaskGetTickCount() - start;
+            if (expired >= timeout_ticks) {
+                esp_tls_conn_delete(tls);
+                ESP_LOGE(TAG, "Failed to open new connection in specified timeout");
+                return NULL;
+            }
         }
     }
     return NULL;

components/esp32/cache_err_int.c

@@ -13,9 +13,9 @@
 // limitations under the License.
 
 /*
- The cache has an interrupt that can be raised as soon as an access to a cached 
+ The cache has an interrupt that can be raised as soon as an access to a cached
- region (flash, psram) is done without the cache being enabled. We use that here 
+ region (flash, psram) is done without the cache being enabled. We use that here
- to panic the CPU, which from a debugging perspective is better than grabbing bad 
+ to panic the CPU, which from a debugging perspective is better than grabbing bad
  data from the bus.
 */
 
@@ -73,7 +73,6 @@ void esp_cache_err_int_init()
 
 int IRAM_ATTR esp_cache_err_get_cpuid()
 {
-    esp_dport_access_int_pause();
     const uint32_t pro_mask =
             DPORT_PRO_CPU_DISABLED_CACHE_IA_DRAM1 |
             DPORT_PRO_CPU_DISABLED_CACHE_IA_DROM0 |

components/esp32/panic.c

@@ -382,7 +382,7 @@ static void illegal_instruction_helper(XtExcFrame *frame)
     panicPutStr("Memory dump at 0x");
     panicPutHex(epc);
     panicPutStr(": ");
-    
+
     panicPutHex(*pepc);
     panicPutStr(" ");
     panicPutHex(*(pepc + 1));
@@ -544,8 +544,9 @@ static void commonErrorHandler_dump(XtExcFrame *frame, int core_id)
 
     panicPutStr("\r\nELF file SHA256: ");
     char sha256_buf[65];
-    esp_ota_get_app_elf_sha256(sha256_buf, sizeof(sha256_buf));
+    // Disable for avoid access cache
-    panicPutStr(sha256_buf);
+    // esp_ota_get_app_elf_sha256(sha256_buf, sizeof(sha256_buf));
+    // panicPutStr(sha256_buf);
     panicPutStr("\r\n");
 
     /* With windowed ABI backtracing is easy, let's do it. */
@@ -623,7 +624,7 @@ static __attribute__((noreturn)) void commonErrorHandler(XtExcFrame *frame)
     rtc_wdt_disable();
 #if CONFIG_ESP32_PANIC_PRINT_REBOOT || CONFIG_ESP32_PANIC_SILENT_REBOOT
     panicPutStr("Rebooting...\r\n");
-    if (frame->exccause != PANIC_RSN_CACHEERR) {
+    if (esp_cache_err_get_cpuid() == -1) {
         esp_restart_noos();
     } else {
         // The only way to clear invalid cache access interrupt is to reset the digital part

components/esp_http_client/esp_http_client.c

@@ -742,7 +742,7 @@ esp_err_t esp_http_client_set_url(esp_http_client_handle_t client, const char *u
         } else {
             return ESP_ERR_NO_MEM;
         }
-    } 
+    }
 
     //Reset path and query if there are no information
     if (purl.field_data[UF_PATH].len) {
@@ -825,7 +825,7 @@ int esp_http_client_read(esp_http_client_handle_t client, char *buffer, int len)
         ESP_LOGD(TAG, "need_read=%d, byte_to_read=%d, rlen=%d, ridx=%d", need_read, byte_to_read, rlen, ridx);
 
         if (rlen <= 0) {
-            return ridx;
+            return rlen;
         }
         res_buffer->output_ptr = buffer + ridx;
         http_parser_execute(client->parser, client->parser_settings, res_buffer->data, rlen);