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Commit f4028119 authored by Amit Shah's avatar Amit Shah Committed by Rusty Russell
Browse files

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: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent b3dddb9e

drivers/char/virtio_console.c

+3 −0
Original line number Diff line number Diff line
@@ -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);