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From 5399dd7756a093453751dea34212ba19db328eb4 Mon Sep 17 00:00:00 2001
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d4cdad5 |
From: Hans de Goede <hdegoede@redhat.com>
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d4cdad5 |
Date: Tue, 19 Jul 2011 10:56:19 +0200
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5544c1b |
Subject: [PATCH] usb-redir: Add flow control support
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d4cdad5 |
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d4cdad5 |
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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![](https://seccdn.libravatar.org/avatar/e0cb5334e5a1824445e4ed5d9488fcffc5d667adb8665f37581b8d299b22ec59?s=16&d=retro) |
bd56df9 |
Signed-off-by: Cole Robinson <crobinso@redhat.com>
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![](https://seccdn.libravatar.org/avatar/70cc2f818f82d9376966cb929baa882ad4848e1a2dcae81bc5eaf64ed1894721?s=16&d=retro) |
d4cdad5 |
---
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5544c1b |
hw/usb/redirect.c | 22 ++++++++++++++++++++--
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![](https://seccdn.libravatar.org/avatar/e0cb5334e5a1824445e4ed5d9488fcffc5d667adb8665f37581b8d299b22ec59?s=16&d=retro) |
5544c1b |
1 file changed, 20 insertions(+), 2 deletions(-)
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d4cdad5 |
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329b588 |
diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
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5544c1b |
index 8b22c80..b7c7f1e 100644
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329b588 |
--- a/hw/usb/redirect.c
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![](https://seccdn.libravatar.org/avatar/a90c8fc1fa6bf435277bf1a6f0e8dcfa5081a34b29502febdc7c45358f87105e?s=16&d=retro) |
329b588 |
+++ b/hw/usb/redirect.c
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5544c1b |
@@ -229,12 +229,22 @@ static int usbredir_read(void *priv, uint8_t *data, int count)
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d4cdad5 |
static int usbredir_write(void *priv, uint8_t *data, int count)
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d4cdad5 |
{
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d4cdad5 |
USBRedirDevice *dev = priv;
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d4cdad5 |
+ int r;
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![](https://seccdn.libravatar.org/avatar/a90c8fc1fa6bf435277bf1a6f0e8dcfa5081a34b29502febdc7c45358f87105e?s=16&d=retro) |
329b588 |
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d4cdad5 |
- if (!dev->cs->opened) {
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d4cdad5 |
+ if (!dev->cs->opened || dev->cs->write_blocked) {
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d4cdad5 |
return 0;
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d4cdad5 |
}
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329b588 |
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d4cdad5 |
- return qemu_chr_fe_write(dev->cs, data, count);
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d4cdad5 |
+ r = qemu_chr_fe_write(dev->cs, data, count);
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d4cdad5 |
+
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d4cdad5 |
+ if (r < 0) {
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d4cdad5 |
+ if (dev->cs->write_blocked) {
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d4cdad5 |
+ return 0;
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+ }
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d4cdad5 |
+ return -1;
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d4cdad5 |
+ }
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d4cdad5 |
+
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d4cdad5 |
+ return r;
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d4cdad5 |
}
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329b588 |
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d4cdad5 |
/*
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5544c1b |
@@ -867,10 +877,18 @@ static void usbredir_chardev_event(void *opaque, int event)
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}
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}
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d4cdad5 |
+static void usbredir_chardev_write_unblocked(void *opaque)
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+{
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d4cdad5 |
+ USBRedirDevice *dev = opaque;
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+
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d4cdad5 |
+ usbredirparser_do_write(dev->parser);
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d4cdad5 |
+}
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d4cdad5 |
+
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d4cdad5 |
static const QemuChrHandlers usbredir_chr_handlers = {
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d4cdad5 |
.fd_can_read = usbredir_chardev_can_read,
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d4cdad5 |
.fd_read = usbredir_chardev_read,
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d4cdad5 |
.fd_event = usbredir_chardev_event,
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d4cdad5 |
+ .fd_write_unblocked = usbredir_chardev_write_unblocked,
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d4cdad5 |
};
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329b588 |
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d4cdad5 |
/*
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