linux-kernel - [PATCH] PCI: Delay after FLR of Intel DC P4510 NVMe

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Message-ID: <20210408190521.16897-1-raphael.norwitz@nutanix.com>
Date:   Thu, 8 Apr 2021 19:05:27 +0000
From:   Raphael Norwitz <raphael.norwitz@...anix.com>
To:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>
CC:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "ameynarkhede03@...il.com" <ameynarkhede03@...il.com>,
        Raphael Norwitz <raphael.norwitz@...anix.com>,
        Alay Shah <alay.shah@...anix.com>,
        Suresh Gumpula <suresh.gumpula@...anix.com>
Subject: [PATCH] PCI: Delay after FLR of Intel DC P4510 NVMe

Like the Intel DC P3700 NVMe, the Intel P4510 NVMe exhibits a timeout
failure when the driver tries to interact with the device to soon after
an FLR. The same reset quirk the P3700 uses also resolves the failure
for the P4510, so this change introduces the same reset quirk for the
P4510.

Reviewed-by: Alex Williamson <alex.williamson@...hat.com>
Signed-off-by: Alay Shah <alay.shah@...anix.com>
Signed-off-by: Suresh Gumpula <suresh.gumpula@...anix.com>
Signed-off-by: Raphael Norwitz <raphael.norwitz@...anix.com>
---
 drivers/pci/quirks.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 653660e3ba9e..5a8c059b848d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3922,6 +3922,7 @@ static const struct pci_dev_reset_methods pci_dev_reset_methods[] = {
 		reset_ivb_igd },
 	{ PCI_VENDOR_ID_SAMSUNG, 0xa804, nvme_disable_and_flr },
 	{ PCI_VENDOR_ID_INTEL, 0x0953, delay_250ms_after_flr },
+	{ PCI_VENDOR_ID_INTEL, 0x0a54, delay_250ms_after_flr },
 	{ PCI_VENDOR_ID_CHELSIO, PCI_ANY_ID,
 		reset_chelsio_generic_dev },
 	{ 0 }
-- 
2.20.1