[Qemu-devel] [PATCH] scsi-bus: fix endianness bug in store_lun()

[Alexey Kardashevskiy <aik@ozlabs.ru>]

SCSI protocol is defined as big endian. The SCSI command REPORT_LUNS
returns the list of LUNs, 8 bytes each.

The store_lun() function is called from scsi_target_emulate_report_luns()
to fill the LUNs list which is sent later to a guest a response. However
it puts the 2 bytes long big-endian value while it is 8 bytes long.

The patch fixes it. Tested on PPC64 platform.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
 hw/scsi-bus.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index a97f1cd..7059dc2 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -310,11 +310,11 @@ struct SCSITargetReq {
 static void store_lun(uint8_t *outbuf, int lun)
 {
     if (lun < 256) {
-        outbuf[1] = lun;
+        outbuf[7] = lun;
         return;
     }
-    outbuf[1] = (lun & 255);
-    outbuf[0] = (lun >> 8) | 0x40;
+    outbuf[7] = (lun & 255);
+    outbuf[6] = (lun >> 8) | 0x40;
 }
 
 static bool scsi_target_emulate_report_luns(SCSITargetReq *r)
-- 
1.7.10.4