From 250870824c1cf199b032b1ef889c8e8d69d9123a Mon Sep 17 00:00:00 2001 From: Michael Karcher Date: Tue, 24 Jan 2023 22:48:16 +0100 Subject: [PATCH 1/2] sh: intc: Avoid spurious sizeof-pointer-div warning GCC warns about the pattern sizeof(void*)/sizeof(void), as it looks like the abuse of a pattern to calculate the array size. This pattern appears in the unevaluated part of the ternary operator in _INTC_ARRAY if the parameter is NULL. The replacement uses an alternate approach to return 0 in case of NULL which does not generate the pattern sizeof(void*)/sizeof(void), but still emits the warning if _INTC_ARRAY is called with a nonarray parameter. This patch is required for successful compilation with -Werror enabled. The idea to use _Generic for type distinction is taken from Comment #7 in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108483 by Jakub Jelinek Signed-off-by: Michael Karcher Acked-by: Randy Dunlap # build-tested Link: https://lore.kernel.org/r/619fa552-c988-35e5-b1d7-fe256c46a272@mkarcher.dialup.fu-berlin.de Signed-off-by: John Paul Adrian Glaubitz --- include/linux/sh_intc.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/sh_intc.h b/include/linux/sh_intc.h index c255273b0281..37ad81058d6a 100644 --- a/include/linux/sh_intc.h +++ b/include/linux/sh_intc.h @@ -97,7 +97,10 @@ struct intc_hw_desc { unsigned int nr_subgroups; }; -#define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a) +#define _INTC_SIZEOF_OR_ZERO(a) (_Generic(a, \ + typeof(NULL): 0, \ + default: sizeof(a))) +#define _INTC_ARRAY(a) a, _INTC_SIZEOF_OR_ZERO(a)/sizeof(*a) #define INTC_HW_DESC(vectors, groups, mask_regs, \ prio_regs, sense_regs, ack_regs) \ From ff30bd6a6618e979b16977617371c0f28a95036e Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Thu, 2 Feb 2023 17:20:55 +0100 Subject: [PATCH 2/2] sh: clk: Fix clk_enable() to return 0 on NULL clk On SH, devm_clk_get_optional_enabled() fails with -EINVAL if the clock is not found. This happens because __devm_clk_get() assumes it can pass a NULL clock pointer (as returned by clk_get_optional()) to the init() function (clk_prepare_enable() in this case), while the SH implementation of clk_enable() considers that an error. Fix this by making the SH clk_enable() implementation return zero instead, like the Common Clock Framework does. Reported-by: John Paul Adrian Glaubitz Signed-off-by: Geert Uytterhoeven Tested-by: John Paul Adrian Glaubitz Acked-by: Stephen Boyd Link: https://lore.kernel.org/r/b53e6b557b4240579933b3359dda335ff94ed5af.1675354849.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz --- drivers/sh/clk/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/sh/clk/core.c b/drivers/sh/clk/core.c index d996782a7106..7a73f5e4a1fc 100644 --- a/drivers/sh/clk/core.c +++ b/drivers/sh/clk/core.c @@ -295,7 +295,7 @@ int clk_enable(struct clk *clk) int ret; if (!clk) - return -EINVAL; + return 0; spin_lock_irqsave(&clock_lock, flags); ret = __clk_enable(clk);