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console: add console_flush_stdin()

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Add a common helper console_flush_stdin() to drain all pending
characters from stdin. This consolidates the open-coded
while (tstc()) getchar() pattern that appeared in multiple places
across the tree.

Signed-off-by: Gregor Herburger <gregor.herburger@linutronix.de>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Gregor Herburger
2026-04-13 17:24:53 +02:00
committed by Tom Rini
parent 3abc7c1d46
commit 2c8fdd7aea
7 changed files with 26 additions and 23 deletions
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7
lib/efi_loader/efi_console.c
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@@ -9,6 +9,7 @@
#include <ansi.h>
#include <charset.h>
#include <console.h>
#include <efi_device_path.h>
#include <malloc.h>
#include <time.h>
@@ -299,8 +300,7 @@ static int query_console_serial(int *rows, int *cols)
int n[2];
/* Empty input buffer */
while (tstc())
getchar();
console_flush_stdin();
/*
* Not all terminals understand CSI [18t for querying the console size.
@@ -960,8 +960,7 @@ static void efi_cin_check(void)
*/
static void efi_cin_empty_buffer(void)
{
while (tstc())
getchar();
console_flush_stdin();
key_available = false;
}