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serial COM: windows serial COM PollingFunc don't sleep

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Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1802
Signed-off-by: Werner de Carne <werner@carne.de>
[ Marc-André - indentation fixes ]
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20230807201443.2668-1-werner@carne.de>
This commit is contained in:
Werner de Carne
2023-08-07 22:14:43 +02:00
committed by Marc-André Lureau
parent 52cf667ed2
commit 7437b3eab6
1 changed files with 10 additions and 6 deletions
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16
chardev/char-win.c
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@@ -28,7 +28,7 @@
#include "qapi/error.h"
#include "chardev/char-win.h"
static void win_chr_read(Chardev *chr, DWORD len)
static int win_chr_read(Chardev *chr, DWORD len)
{
WinChardev *s = WIN_CHARDEV(chr);
int max_size = qemu_chr_be_can_write(chr);
@@ -40,7 +40,7 @@ static void win_chr_read(Chardev *chr, DWORD len)
len = max_size;
}
if (len == 0) {
return;
return 0;
}
ZeroMemory(&s->orecv, sizeof(s->orecv));
@@ -56,6 +56,8 @@ static void win_chr_read(Chardev *chr, DWORD len)
if (size > 0) {
qemu_chr_be_write(chr, buf, size);
}
return size > 0 ? 1 : 0;
}
static int win_chr_serial_poll(void *opaque)
@@ -67,8 +69,9 @@ static int win_chr_serial_poll(void *opaque)
ClearCommError(s->file, &comerr, &status);
if (status.cbInQue > 0) {
win_chr_read(chr, status.cbInQue);
return 1;
if (win_chr_read(chr, status.cbInQue)) {
return 1;
}
}
return 0;
}
@@ -147,8 +150,9 @@ int win_chr_pipe_poll(void *opaque)
PeekNamedPipe(s->file, NULL, 0, NULL, &size, NULL);
if (size > 0) {
win_chr_read(chr, size);
return 1;
if (win_chr_read(chr, size)) {
return 1;
}
}
return 0;
}