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usb-redir: Don't try to write to the chardev after a close event 

Since we handle close async in a bh, do_write and thus write can get
called after receiving a close event. This patch adds a check to
the usb-redir write callback to not call qemu_chr_fe_write on a closed
backend.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Hans de Goede 2011-11-19 10:22:47 +01:00 committed by Anthony Liguori
parent 99f08100cd
commit c1b71a1df6
1 changed files with 4 additions and 0 deletions
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4
usb-redir.c
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@ -225,6 +225,10 @@ static int usbredir_write(void *priv, uint8_t *data, int count)
{ {
USBRedirDevice *dev = priv; USBRedirDevice *dev = priv;
if (!dev->cs->opened) {
return 0;
}
return qemu_chr_fe_write(dev->cs, data, count); return qemu_chr_fe_write(dev->cs, data, count);
} }