1 files changed, 37 insertions, 2 deletions
diff --git a/emulators/qemu/files/patch-block.c b/emulators/qemu/files/patch-block.c
index d174d8f96e27..c924d2d96039 100644
--- a/emulators/qemu/files/patch-block.c
+++ b/emulators/qemu/files/patch-block.c
@@ -1,5 +1,4 @@
---- qemu/block.c.orig	Thu Sep 30 06:27:57 2004
-+++ qemu/block.c	Thu Nov  4 23:19:37 2004
+Index: qemu/block.c
 @@ -21,6 +21,17 @@
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
@@ -18,6 +17,42 @@
  #include "vl.h"
  #include "block_int.h"
  
+@@ -103,14 +103,25 @@
+ {
+     int fd, ret, score, score_max;
+     BlockDriver *drv1, *drv;
+-    uint8_t buf[1024];
++    uint8_t *buf;
++    size_t bufsize = 1024;
++    u_int sectorsize = 512;
+ 
+     fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE);
+     if (fd < 0)
+         return NULL;
+-    ret = read(fd, buf, sizeof(buf));
++#ifdef DIOCGSECTORSIZE
++    if (!ioctl(fd, DIOCGSECTORSIZE, &sectorsize) &&
++        sectorsize > bufsize)
++        bufsize = sectorsize;
++#endif
++    buf = malloc(bufsize);
++    if (!buf)
++        return NULL;
++    ret = read(fd, buf, bufsize);
+     if (ret < 0) {
+         close(fd);
++        free(buf);
+         return NULL;
+     }
+     close(fd);
+@@ -124,6 +135,7 @@
+             drv = drv1;
+         }
+     }
++    free(buf);
+     return drv;
+ }
+ 
 @@ -522,6 +533,15 @@
              return -1;
          bs->read_only = 1;