linux-kernel - [PATCH 4.4 03/93] xen-netback: delete NAPI instance when queue fails to initialize

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Date:   Mon,  1 Mar 2021 17:12:15 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, David Vrabel <david.vrabel@...rix.com>,
        "David S. Miller" <davem@...emloft.net>,
        SeongJae Park <sjpark@...zon.com>,
        Markus Boehme <markubo@...zon.de>
Subject: [PATCH 4.4 03/93] xen-netback: delete NAPI instance when queue fails to initialize

From: David Vrabel <david.vrabel@...rix.com>

commit 4a658527271bce43afb1cf4feec89afe6716ca59 upstream.

When xenvif_connect() fails it may leave a stale NAPI instance added to
the device.  Make sure we delete it in the error path.

Signed-off-by: David Vrabel <david.vrabel@...rix.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Cc: SeongJae Park <sjpark@...zon.com>
Tested-by: Markus Boehme <markubo@...zon.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/xen-netback/interface.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -662,6 +662,7 @@ err_tx_unbind:
 	queue->tx_irq = 0;
 err_unmap:
 	xenvif_unmap_frontend_rings(queue);
+	netif_napi_del(&queue->napi);
 err:
 	return err;
 }