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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Eric Auger <eric.auger@redhat.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.13 180/380] misc/pvpanic-pci: Allow automatic loading
Date:   Thu, 16 Sep 2021 17:58:57 +0200
Message-Id: <20210916155810.194741203@linuxfoundation.org>
In-Reply-To: <20210916155803.966362085@linuxfoundation.org>
References: <20210916155803.966362085@linuxfoundation.org>
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From: Eric Auger <eric.auger@redhat.com>

[ Upstream commit 28b6a003bcdfa1fc4603b9185b247ecca7af9bef ]

The virtual machine monitor (QEMU) exposes the pvpanic-pci
device to the guest. On guest side the module exists but
currently isn't loaded automatically. So the driver fails
to be probed and does not its job of handling guest panic
events.

Instead of requiring manual modprobe, let's include a device
database using the MODULE_DEVICE_TABLE macro and let the
module auto-load when the guest gets exposed with such a
pvpanic-pci device.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20210629072214.901004-1-eric.auger@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/misc/pvpanic/pvpanic-pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/pvpanic/pvpanic-pci.c b/drivers/misc/pvpanic/pvpanic-pci.c
index 046ce4ecc195..4a3250564442 100644
--- a/drivers/misc/pvpanic/pvpanic-pci.c
+++ b/drivers/misc/pvpanic/pvpanic-pci.c
@@ -119,4 +119,6 @@ static struct pci_driver pvpanic_pci_driver = {
 	},
 };
 
+MODULE_DEVICE_TABLE(pci, pvpanic_pci_id_tbl);
+
 module_pci_driver(pvpanic_pci_driver);
-- 
2.30.2