linux-kernel - [PATCH] PCI: quirk for preventing bus reset on TI C667X

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Date:   Tue, 12 Jan 2021 15:36:43 +0000
From:   Antti Järvinen <antti.jarvinen@...il.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Antti Järvinen <antti.jarvinen@...il.com>
Subject: [PATCH] PCI: quirk for preventing bus reset on TI C667X

TI C667X does not support bus/hot reset.
See https://e2e.ti.com/support/processors/f/791/t/954382

Signed-off-by: Antti Järvinen <antti.jarvinen@...il.com>
---
 drivers/pci/quirks.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 653660e3ba9e..c8fcf24c5bd0 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3578,6 +3578,12 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0034, quirk_no_bus_reset);
  */
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset);
 
+/*
+ * Some TI keystone C667X devices do no support bus/hot reset.
+ * https://e2e.ti.com/support/processors/f/791/t/954382
+ */
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, 0xb005, quirk_no_bus_reset);
+
 static void quirk_no_pm_reset(struct pci_dev *dev)
 {
 	/*
-- 
2.17.1