The region is registered as 64KiB in sabre_init():

    memory_region_init_io(&s->sabre_config, OBJECT(s), &sabre_config_ops, s,
                          "sabre-config", 0x10000);

Remove the superfluous check.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/pci-host/sabre.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/pci-host/sabre.c b/hw/pci-host/sabre.c
index 3634f8369b7..0889c9369f6 100644
--- a/hw/pci-host/sabre.c
+++ b/hw/pci-host/sabre.c
@@ -120,7 +120,7 @@ static void sabre_config_write(void *opaque, hwaddr addr,
 
     trace_sabre_config_write(addr, val);
 
-    switch (addr & 0xffff) {
+    switch (addr) {
     case 0x30 ... 0x4f: /* DMA error registers */
         /* XXX: not implemented yet */
         break;
@@ -197,7 +197,7 @@ static uint64_t sabre_config_read(void *opaque,
     SabreState *s = opaque;
     uint32_t val;
 
-    switch (addr & 0xffff) {
+    switch (addr) {
     case 0x30 ... 0x4f: /* DMA error registers */
         val = 0;
         /* XXX: not implemented yet */
-- 
2.26.2

On 12/10/2020 18:09, Philippe Mathieu-Daudé wrote:

> The region is registered as 64KiB in sabre_init():
> 
>      memory_region_init_io(&s->sabre_config, OBJECT(s), &sabre_config_ops, s,
>                            "sabre-config", 0x10000);
> 
> Remove the superfluous check.
> 
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>   hw/pci-host/sabre.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/pci-host/sabre.c b/hw/pci-host/sabre.c
> index 3634f8369b7..0889c9369f6 100644
> --- a/hw/pci-host/sabre.c
> +++ b/hw/pci-host/sabre.c
> @@ -120,7 +120,7 @@ static void sabre_config_write(void *opaque, hwaddr addr,
>   
>       trace_sabre_config_write(addr, val);
>   
> -    switch (addr & 0xffff) {
> +    switch (addr) {
>       case 0x30 ... 0x4f: /* DMA error registers */
>           /* XXX: not implemented yet */
>           break;
> @@ -197,7 +197,7 @@ static uint64_t sabre_config_read(void *opaque,
>       SabreState *s = opaque;
>       uint32_t val;
>   
> -    switch (addr & 0xffff) {
> +    switch (addr) {
>       case 0x30 ... 0x4f: /* DMA error registers */
>           val = 0;
>           /* XXX: not implemented yet */

Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>


ATB,

Mark.