Fix process_mapc() to consistently return CMD_STALL for memory
errors and CMD_CONTINUE for parameter errors, as we claim in the
comments that we do.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/intc/arm_gicv3_its.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 5b25347de12..7615e9aa279 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -489,7 +489,6 @@ static ItsCmdResult process_mapc(GICv3ITSState *s, uint32_t offset)
     uint64_t rdbase;
     bool valid;
     MemTxResult res = MEMTX_OK;
-    ItsCmdResult result = CMD_STALL;
     uint64_t value;
 
     offset += NUM_BYTES_IN_DW;
@@ -499,7 +498,7 @@ static ItsCmdResult process_mapc(GICv3ITSState *s, uint32_t offset)
                                  MEMTXATTRS_UNSPECIFIED, &res);
 
     if (res != MEMTX_OK) {
-        return result;
+        return CMD_STALL;
     }
 
     icid = value & ICID_MASK;
@@ -518,11 +517,10 @@ static ItsCmdResult process_mapc(GICv3ITSState *s, uint32_t offset)
          * we ignore this command and move onto the next
          * command in the queue
          */
-    } else {
-        result = update_cte(s, icid, valid, rdbase) ? CMD_CONTINUE : CMD_STALL;
+        return CMD_CONTINUE;
     }
 
-    return result;
+    return update_cte(s, icid, valid, rdbase) ? CMD_CONTINUE : CMD_STALL;
 }
 
 static bool update_dte(GICv3ITSState *s, uint32_t devid, bool valid,
-- 
2.25.1

On 12/11/21 11:11 AM, Peter Maydell wrote:
> Fix process_mapc() to consistently return CMD_STALL for memory
> errors and CMD_CONTINUE for parameter errors, as we claim in the
> comments that we do.
> 
> Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> ---
>   hw/intc/arm_gicv3_its.c | 8 +++-----
>   1 file changed, 3 insertions(+), 5 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~

Peter Maydell <peter.maydell@linaro.org> writes:

> Fix process_mapc() to consistently return CMD_STALL for memory
> errors and CMD_CONTINUE for parameter errors, as we claim in the
> comments that we do.
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

-- 
Alex Bennée