From 45e81cb7c08fbdb3387863287da28c5a5442a534 Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Tue, 15 Oct 2019 12:54:17 -0700
Subject: [PATCH] libata/ahci: Fix PCS quirk application

commit 09d6ac8dc51a033ae0043c1fe40b4d02563c2496 upstream.

Commit c312ef176399 "libata/ahci: Drop PCS quirk for Denverton and
beyond" got the polarity wrong on the check for which board-ids should
have the quirk applied. The board type board_ahci_pcs7 is defined at the
end of the list such that "pcs7" boards can be special cased in the
future if they need the quirk. All prior Intel board ids "<
board_ahci_pcs7" should proceed with applying the quirk.

Reported-by: Andreas Friedrich <afrie@gmx.net>
Reported-by: Stephen Douthit <stephend@silicom-usa.com>
Fixes: c312ef176399 ("libata/ahci: Drop PCS quirk for Denverton and beyond")
Cc: <stable@vger.kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 3e63294304c7..691852b8bb41 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1617,7 +1617,9 @@ static void ahci_intel_pcs_quirk(struct pci_dev *pdev, struct ahci_host_priv *hp
 	 */
 	if (!id || id->vendor != PCI_VENDOR_ID_INTEL)
 		return;
-	if (((enum board_ids) id->driver_data) < board_ahci_pcs7)
+
+	/* Skip applying the quirk on Denverton and beyond */
+	if (((enum board_ids) id->driver_data) >= board_ahci_pcs7)
 		return;
 
 	/*
-- 
2.7.4