diff --git a/src/flash/at91sam7.c b/src/flash/at91sam7.c
index 0115c18b641adea2a5c97fe0781b45f01906c76f..907302eb2b75f15de3b56ffbe219b326f592e4ca 100644
--- a/src/flash/at91sam7.c
+++ b/src/flash/at91sam7.c
@@ -674,7 +674,7 @@ int at91sam7_erase(struct flash_bank_s *bank, int first, int last)
 
 int at91sam7_protect(struct flash_bank_s *bank, int set, int first, int last)
 {
-	u32 cmd, pagen, status;
+	u32 cmd, pagen;
 	u8 flashplane;
 	int lockregion;
 	
diff --git a/src/flash/cfi.c b/src/flash/cfi.c
index b952bb7f49173d6c8f89d59518385a6ff9099ef3..ee99408e8a5a9b4f4ec5dcbf9ca5af774af8dd99 100644
--- a/src/flash/cfi.c
+++ b/src/flash/cfi.c
@@ -2046,7 +2046,7 @@ int cfi_info(struct flash_bank_s *bank, char *buf, int buf_size)
 	int printed;
 	cfi_flash_bank_t *cfi_info = bank->driver_priv;
 
-	if (cfi_info->qry[0] == -1)
+	if (cfi_info->qry[0] == (char)-1)
 	{
 		printed = snprintf(buf, buf_size, "\ncfi flash bank not probed yet\n");
 		return ERROR_OK;
diff --git a/src/helper/command.c b/src/helper/command.c
index 11284a1c4c86744b6eb7f13d160e388fa4f85c75..f69deb49d8778c6c3a030e895b01995e8ca62838 100644
--- a/src/helper/command.c
+++ b/src/helper/command.c
@@ -383,7 +383,11 @@ int command_run_file(command_context_t *context, FILE *file, enum command_mode m
 {
 	int retval = ERROR_OK;
 	int old_command_mode;
-	char buffer[4096];
+	char *buffer=malloc(4096);
+	if (buffer==NULL)
+	{
+		return ERROR_INVALID_ARGUMENTS;
+	}
 	
 	old_command_mode = context->mode;
 	context->mode = mode;
@@ -422,6 +426,9 @@ int command_run_file(command_context_t *context, FILE *file, enum command_mode m
 	}
 	
 	context->mode = old_command_mode;
+
+	
+	free(buffer);
 	
 	return retval;
 }
diff --git a/src/jtag/jtag.c b/src/jtag/jtag.c
index 09cffef799e601cdc59a8acb02262c72c29d6534..6356bec6ac2e7defbbad51b5beb203cb904dea83 100644
--- a/src/jtag/jtag.c
+++ b/src/jtag/jtag.c
@@ -1446,7 +1446,8 @@ int jtag_init(struct command_context_s *cmd_ctx)
 					if (validate_tries > 5)
 					{
 						ERROR("Could not validate JTAG chain, exit");
-						exit(-1);
+						jtag = NULL;
+						return ERROR_JTAG_INVALID_INTERFACE;
 					}
 					usleep(10000);
 				}
@@ -1568,8 +1569,9 @@ int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, ch
 			jtag_reset_config = RESET_TRST_AND_SRST;
 		else
 		{
-			ERROR("invalid reset_config argument");
-			exit(-1);
+			ERROR("invalid reset_config argument, defaulting to none");
+			jtag_reset_config = RESET_NONE;
+			return ERROR_INVALID_ARGUMENTS;
 		}
 	}
 	
@@ -1585,8 +1587,9 @@ int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, ch
 			jtag_reset_config &= ~(RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST);
 		else
 		{
-			ERROR("invalid reset_config argument");
-			exit(-1);
+			ERROR("invalid reset_config argument, defaulting to none");
+			jtag_reset_config = RESET_NONE;
+			return ERROR_INVALID_ARGUMENTS;
 		}
 	}
 	
@@ -1598,8 +1601,9 @@ int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, ch
 			jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN;
 		else
 		{
-			ERROR("invalid reset_config argument");
-			exit(-1);
+			ERROR("invalid reset_config argument, defaulting to none");
+			jtag_reset_config = RESET_NONE;
+			return ERROR_INVALID_ARGUMENTS;
 		}
 	}
 
@@ -1611,8 +1615,9 @@ int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, ch
 			jtag_reset_config &= ~RESET_SRST_PUSH_PULL;
 		else
 		{
-			ERROR("invalid reset_config argument");
-			exit(-1);
+			ERROR("invalid reset_config argument, defaulting to none");
+			jtag_reset_config = RESET_NONE;
+			return ERROR_INVALID_ARGUMENTS;
 		}
 	}