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| author | Keir Fraser <keir.fraser@citrix.com> | 2009-12-17 06:27:56 +0000 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2009-12-17 06:27:56 +0000 |
| commit | 7e31226c7a62a1b88727b9e718eb11b745de16ab (patch) | |
| tree | 43696347e078596fd833b874718d65d3d6fd3577 /tools/libxc/xc_linux.c | |
| parent | 40be3d02f08b53726568ce702b227f33b63afd31 (diff) | |
| download | xen-7e31226c7a62a1b88727b9e718eb11b745de16ab.tar.gz xen-7e31226c7a62a1b88727b9e718eb11b745de16ab.tar.bz2 xen-7e31226c7a62a1b88727b9e718eb11b745de16ab.zip | |
Support for -EAGAIN from xc_gnttab_map_grant_ref.
Signed-off-by: Grzegorz Milos <Grzegorz.Milos@citrix.com>
Diffstat (limited to 'tools/libxc/xc_linux.c')
| -rw-r--r-- | tools/libxc/xc_linux.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/libxc/xc_linux.c b/tools/libxc/xc_linux.c index de176fbb8b..0f1b78aa57 100644 --- a/tools/libxc/xc_linux.c +++ b/tools/libxc/xc_linux.c @@ -442,13 +442,19 @@ void *xc_gnttab_map_grant_ref(int xcg_handle, uint32_t domid, uint32_t ref, if ( ioctl(xcg_handle, IOCTL_GNTDEV_MAP_GRANT_REF, &map) ) return NULL; +mmap_again: addr = mmap(NULL, PAGE_SIZE, prot, MAP_SHARED, xcg_handle, map.index); if ( addr == MAP_FAILED ) { int saved_errno = errno; struct ioctl_gntdev_unmap_grant_ref unmap_grant; - /* Unmap the driver slots used to store the grant information. */ + if(saved_errno == EAGAIN) + { + usleep(1000); + goto mmap_again; + } + /* Unmap the driver slots used to store the grant information. */ perror("xc_gnttab_map_grant_ref: mmap failed"); unmap_grant.index = map.index; unmap_grant.count = 1; |