CC Michael
On Thu, 10 Sep 2015, Stefano Stabellini wrote:
> On Thu, 10 Sep 2015, Chen, Tiejun wrote:
> > > xen-host-pci-device.c is only compiled if CONFIG_XEN_PCI_PASSTHROUGH
> > > was set by configure. That won't be the case on OSX or Windows, where
> > > the Xen headers don't exist.
> > >
> >
> > Okay. This actually shouldn't be enabled on Windows so what about this?
>
> I think it would be nicer to replace the pread than introducing ifdefs.
Something like:
---
Replace pread with read to avoid build breakages on Windows
Signed-off-by: Stefano Stabellini <stefano.stabell...@eu.citrix.com>
diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
index 58a33fb..9a40429 100644
--- a/hw/pci-host/piix.c
+++ b/hw/pci-host/piix.c
@@ -774,8 +774,11 @@ static int host_pci_config_read(int pos, int len, uint32_t
val)
return -ENODEV;
}
+ if (lseek(config_fd, pos, SEEK_SET) != pos) {
+ return -errno;
+ }
do {
- rc = pread(config_fd, (uint8_t *)&val, len, pos);
+ rc = read(config_fd, (uint8_t *)&val, len);
} while (rc < 0 && (errno == EINTR || errno == EAGAIN));
if (rc != len) {
return -errno;
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