6.12-stable review patch. If anyone has any objections, please let me know.
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From: Nick Chan towinchenmi@gmail.com
[ Upstream commit 51dfe714c03c066aabc815a2bb2adcc998dfcb30 ]
Although there is an existing code comment about flushing the writes, writes were not actually being flushed.
Actually flush the writes by changing readl_relaxed() to readl().
Fixes: 4ed224aeaf661 ("watchdog: Add Apple SoC watchdog driver") Suggested-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Nick Chan towinchenmi@gmail.com Reviewed-by: Guenter Roeck linux@roeck-us.net Link: https://lore.kernel.org/r/20241001170018.20139-2-towinchenmi@gmail.com Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Wim Van Sebroeck wim@linux-watchdog.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/watchdog/apple_wdt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/watchdog/apple_wdt.c b/drivers/watchdog/apple_wdt.c index d4f739932f0be..62dabf223d909 100644 --- a/drivers/watchdog/apple_wdt.c +++ b/drivers/watchdog/apple_wdt.c @@ -130,7 +130,7 @@ static int apple_wdt_restart(struct watchdog_device *wdd, unsigned long mode, * can take up to ~20-25ms until the SoC is actually reset. Just wait * 50ms here to be safe. */ - (void)readl_relaxed(wdt->regs + APPLE_WDT_WD1_CUR_TIME); + (void)readl(wdt->regs + APPLE_WDT_WD1_CUR_TIME); mdelay(50);
return 0;