diff mbox series

[03/10] watchdog: aspeed: Fix sequential control writes

Message ID 20210809131556.686260-4-clg@kaod.org (mailing list archive)
State New, archived
Headers show
Series Aspeed: 6.2 queue | expand

Commit Message

Cédric Le Goater Aug. 9, 2021, 1:15 p.m. UTC
From: Andrew Jeffery <andrew@aj.id.au>

The logic in the handling for the control register required toggling the
enable state for writes to stick. Rework the condition chain to allow
sequential writes that do not update the enable state.

Fixes: 854123bf8d4b ("wdt: Add Aspeed watchdog device model")
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20210709053107.1829304-3-andrew@aj.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/watchdog/wdt_aspeed.c | 2 ++
 1 file changed, 2 insertions(+)

Comments

Philippe Mathieu-Daudé Aug. 9, 2021, 3:48 p.m. UTC | #1
On 8/9/21 3:15 PM, Cédric Le Goater wrote:
> From: Andrew Jeffery <andrew@aj.id.au>
> 
> The logic in the handling for the control register required toggling the
> enable state for writes to stick. Rework the condition chain to allow
> sequential writes that do not update the enable state.
> 
> Fixes: 854123bf8d4b ("wdt: Add Aspeed watchdog device model")
> Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
> Reviewed-by: Cédric Le Goater <clg@kaod.org>
> Message-Id: <20210709053107.1829304-3-andrew@aj.id.au>
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
>  hw/watchdog/wdt_aspeed.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/hw/watchdog/wdt_aspeed.c b/hw/watchdog/wdt_aspeed.c
> index faa3d35fdf21..69c37af9a6e9 100644
> --- a/hw/watchdog/wdt_aspeed.c
> +++ b/hw/watchdog/wdt_aspeed.c
> @@ -166,6 +166,8 @@ static void aspeed_wdt_write(void *opaque, hwaddr offset, uint64_t data,
>          } else if (!enable && aspeed_wdt_is_enabled(s)) {
>              s->regs[WDT_CTRL] = data;
>              timer_del(s->timer);
> +        } else {
> +            s->regs[WDT_CTRL] = data;
>          }

Alternatively easier to review:

           } else {
               if (!enable && aspeed_wdt_is_enabled(s)) {
                   timer_del(s->timer);
               }
               s->regs[WDT_CTRL] = data;
           }

>          break;
>      case WDT_RESET_WIDTH:
>
diff mbox series

Patch

diff --git a/hw/watchdog/wdt_aspeed.c b/hw/watchdog/wdt_aspeed.c
index faa3d35fdf21..69c37af9a6e9 100644
--- a/hw/watchdog/wdt_aspeed.c
+++ b/hw/watchdog/wdt_aspeed.c
@@ -166,6 +166,8 @@  static void aspeed_wdt_write(void *opaque, hwaddr offset, uint64_t data,
         } else if (!enable && aspeed_wdt_is_enabled(s)) {
             s->regs[WDT_CTRL] = data;
             timer_del(s->timer);
+        } else {
+            s->regs[WDT_CTRL] = data;
         }
         break;
     case WDT_RESET_WIDTH: