From: Peter Maydell <peter.maydell@linaro.org>
Date: Mon, 17 Mar 2014 16:00:32 +0000 (+0000)
Subject: hw/pci/pci_host.c: Avoid shifting left into sign bit
X-Git-Tag: qemu-xen-4.5.0-rc1~72^2~11
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=ac43fa508cc1cfe6d6f67c8eb99dc012e52c164e;p=qemu-upstream-4.5-testing.git

hw/pci/pci_host.c: Avoid shifting left into sign bit

Add U suffix to avoid undefined behaviour.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---

diff --git a/hw/pci/pci_host.c b/hw/pci/pci_host.c
index 77c7d1f86..3e26f9256 100644
--- a/hw/pci/pci_host.c
+++ b/hw/pci/pci_host.c
@@ -142,8 +142,9 @@ static uint64_t pci_host_data_read(void *opaque,
 {
     PCIHostState *s = opaque;
     uint32_t val;
-    if (!(s->config_reg & (1 << 31)))
+    if (!(s->config_reg & (1U << 31))) {
         return 0xffffffff;
+    }
     val = pci_data_read(s->bus, s->config_reg | (addr & 3), len);
     PCI_DPRINTF("read addr " TARGET_FMT_plx " len %d val %x\n",
                 addr, len, val);