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[PULL,12/23] hw/pci/pci_host.c: Avoid shifting left into sign bit

Message ID 1395934108-1694-13-git-send-email-mjt@msgid.tls.msk.ru
State Accepted
Commit ac43fa508cc1cfe6d6f67c8eb99dc012e52c164e
Headers show

Commit Message

Michael Tokarev March 27, 2014, 3:28 p.m. UTC 
From: Peter Maydell <peter.maydell@linaro.org>

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>
---
 hw/pci/pci_host.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/hw/pci/pci_host.c b/hw/pci/pci_host.c
index 77c7d1f..3e26f92 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);