From: Tal Shnaiderman <talshn@nvidia.com>
Date: Wed, 14 Oct 2020 19:30:01 +0000 (+0300)
Subject: bus/pci: clear undefined bits in Windows segment parsing
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=c12b14889e30f1c984b67a64044206aa1a7c704d;p=dpdk.git

bus/pci: clear undefined bits in Windows segment parsing

When reading bus and segment values using SPDRP_BUSNUMBER
bits 24-31 are undefined.

They are cleared to verify we read the segment number correctly.

Fixes: c3adf8144a17 ("bus/pci: support segment as address domain on Windows")
Cc: stable@dpdk.org

Signed-off-by: Tal Shnaiderman <talshn@nvidia.com>
Acked-by: Ranjit Menon <ranjit.menon@intel.com>
Acked-by: Narcisa Vasile <navasile@linux.microsoft.com>
---

diff --git a/drivers/bus/pci/windows/pci.c b/drivers/bus/pci/windows/pci.c
index b77b1b6451..10bb0e9cf1 100644
--- a/drivers/bus/pci/windows/pci.c
+++ b/drivers/bus/pci/windows/pci.c
@@ -195,7 +195,7 @@ get_device_pci_address(HDEVINFO dev_info,
 		return -1;
 	}
 
-	addr->domain = bus_num >> 8;
+	addr->domain = (bus_num >> 8) & 0xffff;
 	addr->bus = bus_num & 0xff;
 	addr->devid = dev_and_func >> 16;
 	addr->function = dev_and_func & 0xffff;