[PATCH v1 4/4] IOMUX: Stop dropped consoles

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

When at some point environment shrinks we need to stop dropped devices.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 common/iomux.c | 25 ++++++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/common/iomux.c b/common/iomux.c
index 8a063563aa27..b6936317b12e 100644
--- a/common/iomux.c
+++ b/common/iomux.c
@@ -22,13 +22,19 @@ void iomux_printdevs(const int console)
 	printf("\n");
 }
 
+static void iomux_console_stop(struct stdio_dev *dev)
+{
+	if (dev->stop)
+		dev->stop(dev);
+}
+
 /* This tries to preserve the old list if an error occurs. */
 int iomux_doenv(const int console, const char *arg)
 {
 	char *console_args, *temp, **start;
 	int i, j, k, io_flag, cs_idx, repeat;
+	struct stdio_dev **cons_set, **old_set;
 	struct stdio_dev *dev;
-	struct stdio_dev **cons_set;
 
 	console_args = strdup(arg);
 	if (console_args == NULL)
@@ -128,10 +134,23 @@ int iomux_doenv(const int console, const char *arg)
 		return 1;
 	}
 
-	/* Works even if console_devices[console] is NULL. */
-	free(console_devices[console]);
+	old_set = console_devices[console];
+	repeat = cd_count[console];
+
 	console_devices[console] = cons_set;
 	cd_count[console] = cs_idx;
+
+	/* Stop dropped consoles */
+	for (i = 0; i < repeat; i++) {
+		for (j = 0; j < cs_idx; j++) {
+			if (old_set[i] == cons_set[j])
+				break;
+		}
+		if (j == cs_idx)
+			iomux_console_stop(old_set[i]);
+	}
+
+	free(old_set);
 	return 0;
 }
 #endif /* CONSOLE_MUX */
-- 
2.29.2