From: Manish Jaggi <mjaggi@caviumnetworks.com>
Date: Thu, 30 Mar 2017 23:47:14 +0000 (-0500)
Subject: PCI: Apply Cavium ACS quirk only to CN81xx/CN83xx/CN88xx devices
X-Git-Tag: v4.9.89~154
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aad6ccac0e4fddcfd1b04a2cbd95b550c59da23e;p=platform%2Fkernel%2Flinux-amlogic.git

PCI: Apply Cavium ACS quirk only to CN81xx/CN83xx/CN88xx devices


[ Upstream commit b77d537d00d08fcf0bf641cd3491dd7df0ad1475 ]

Only apply the Cavium ACS quirk to devices with ID in the range
0xa000-0xa0ff.  These are the on-chip PCI devices for CN81xx/CN83xx/CN88xx.

Fixes: b404bcfbf035 ("PCI: Add ACS quirk for all Cavium devices")
Reported-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Manish Jaggi <mjaggi@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 0c9edc9d7c44..4c9fb8b323e8 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4104,6 +4104,9 @@ static int pci_quirk_cavium_acs(struct pci_dev *dev, u16 acs_flags)
 	 */
 	acs_flags &= ~(PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_SV | PCI_ACS_UF);
 
+	if (!((dev->device >= 0xa000) && (dev->device <= 0xa0ff)))
+		return -ENOTTY;
+
 	return acs_flags ? 0 : 1;
 }