Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 170/171] clocksource/drivers/dw_apb_timer_of: Fix probe failure | Date | Mon, 13 Dec 2021 10:31:25 +0100 |
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From: Alexey Sheplyakov <asheplyakov@basealt.ru>
commit a663bd19114d79f0902e2490fc484e5a7419cdc2 upstream.
The driver refuses to probe with -EINVAL since the commit 5d9814df0aec ("clocksource/drivers/dw_apb_timer_of: Add error handling if no clock available").
Before the driver used to probe successfully if either "clock-freq" or "clock-frequency" properties has been specified in the device tree.
That commit changed
if (A && B) panic("No clock nor clock-frequency property");
into
if (!A && !B) return 0;
That's a bug: the reverse of `A && B` is '!A || !B', not '!A && !B'
Signed-off-by: Vadim V. Vlasov <vadim.vlasov@elpitech.ru> Signed-off-by: Alexey Sheplyakov <asheplyakov@basealt.ru> Fixes: 5d9814df0aec56a6 ("clocksource/drivers/dw_apb_timer_of: Add error handling if no clock available"). Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vadim V. Vlasov <vadim.vlasov@elpitech.ru> Acked-by: Dinh Nguyen <dinguyen@kernel.org> Link: https://lore.kernel.org/r/20211109153401.157491-1-asheplyakov@basealt.ru Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/clocksource/dw_apb_timer_of.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/clocksource/dw_apb_timer_of.c +++ b/drivers/clocksource/dw_apb_timer_of.c @@ -47,7 +47,7 @@ static int __init timer_get_base_and_rat pr_warn("pclk for %pOFn is present, but could not be activated\n", np); - if (!of_property_read_u32(np, "clock-freq", rate) && + if (!of_property_read_u32(np, "clock-freq", rate) || !of_property_read_u32(np, "clock-frequency", rate)) return 0;
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