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Message-ID: <1524eafd-f89c-cfa4-ed70-0bde9e45eec9@gmail.com>
Date:   Tue, 1 Dec 2020 12:39:57 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86/reboot/quirks: Add Zotac ZBOX CI327 nano PCI reboot quirk

On this system the M.2 PCIe WiFi card isn't detected after reboot,
only after cold boot. reboot=pci fixes this behavior.
In [0] the same issue is described, although on another system and
with another Intel WiFi card. In case it's relevant, both systems
have Celeron CPU's.
The dicussion in [0] involved the PCI maintainer, and proposal was
to go with the PCI reboot quirk on affected systems until a more
generic fix is available.

[0] https://bugzilla.kernel.org/show_bug.cgi?id=202399

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 arch/x86/kernel/reboot.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index db115943e..9991c5920 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -477,6 +477,15 @@ static const struct dmi_system_id reboot_dmi_table[] __initconst = {
 		},
 	},
 
+	{	/* PCIe Wifi card isn't detected after reboot otherwise */
+		.callback = set_pci_reboot,
+		.ident = "Zotac ZBOX CI327 nano",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "NA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "ZBOX-CI327NANO-GS-01"),
+		},
+	},
+
 	/* Sony */
 	{	/* Handle problems with rebooting on Sony VGN-Z540N */
 		.callback = set_bios_reboot,
-- 
2.29.2

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