From: Amit Shah Date: Thu, 2 Sep 2010 12:41:46 +0000 (+0530) Subject: virtio: console: Make write() return -ENODEV on hot-unplug X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f4028119714e452f9b49377ec55e0ed1e5d1dfa4;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git virtio: console: Make write() return -ENODEV on hot-unplug When a port is hot-unplugged while an app was blocked on a write() call, the call was unblocked but would not get an error returned. Return -ENODEV to ensure the app knows the port has gone away. Signed-off-by: Amit Shah Signed-off-by: Rusty Russell --- diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index e17ecf5d42b..70f1c38fa14 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -626,6 +626,9 @@ static ssize_t port_fops_write(struct file *filp, const char __user *ubuf, if (ret < 0) return ret; } + /* Port got hot-unplugged. */ + if (!port->guest_connected) + return -ENODEV; count = min((size_t)(32 * 1024), count);