From 57d866e606ddf2a0cd51f7140cfd8df1fdaa48f6 Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Thu, 9 Jul 2015 22:39:38 +0200 Subject: [PATCH] clk: fix some determine_rate implementations MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Some determine_rate implementations are not returning an error when they failed to adapt the rate according to the rate request. Fix them so that they return an error instead of silently returning 0. Signed-off-by: Boris Brezillon CC: Jonathan Corbet CC: Tony Lindgren CC: Ralf Baechle CC: "Emilio López" CC: Maxime Ripard Cc: Tero Kristo CC: Peter De Schrijver CC: Prashant Gaikwad CC: Stephen Warren CC: Thierry Reding CC: Alexandre Courbot CC: linux-doc@vger.kernel.org CC: linux-kernel@vger.kernel.org CC: linux-arm-kernel@lists.infradead.org CC: linux-omap@vger.kernel.org CC: linux-mips@linux-mips.org CC: linux-tegra@vger.kernel.org Signed-off-by: Stephen Boyd --- arch/mips/alchemy/common/clock.c | 4 ++++ drivers/clk/clk-composite.c | 3 +-- drivers/clk/clk.c | 3 +++ drivers/clk/hisilicon/clk-hi3620.c | 2 +- drivers/clk/mmp/clk-mix.c | 5 ++++- drivers/clk/sunxi/clk-factors.c | 6 ++++-- drivers/clk/sunxi/clk-sun6i-ar100.c | 3 +++ drivers/clk/sunxi/clk-sunxi.c | 6 ++++-- 8 files changed, 24 insertions(+), 8 deletions(-) diff --git a/arch/mips/alchemy/common/clock.c b/arch/mips/alchemy/common/clock.c index 0b4cf3e9f005..7cc3eed83a1e 100644 --- a/arch/mips/alchemy/common/clock.c +++ b/arch/mips/alchemy/common/clock.c @@ -469,9 +469,13 @@ static int alchemy_clk_fgcs_detr(struct clk_hw *hw, } } + if (br < 0) + return br; + req->best_parent_rate = bpr; req->best_parent_hw = __clk_get_hw(bpc); req->rate = br; + return 0; } diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c index 9e69f346ecc6..35ac062d7df6 100644 --- a/drivers/clk/clk-composite.c +++ b/drivers/clk/clk-composite.c @@ -125,8 +125,7 @@ static int clk_composite_determine_rate(struct clk_hw *hw, return mux_ops->determine_rate(mux_hw, req); } else { pr_err("clk: clk_composite_determine_rate function called, but no mux or rate callback set!\n"); - req->rate = 0; - return 0; + return -EINVAL; } } diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 4e9ff928ef88..c907289ff03c 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -487,6 +487,9 @@ clk_mux_determine_rate_flags(struct clk_hw *hw, struct clk_rate_request *req, } } + if (!best_parent) + return -EINVAL; + out: if (best_parent) req->best_parent_hw = best_parent->hw; diff --git a/drivers/clk/hisilicon/clk-hi3620.c b/drivers/clk/hisilicon/clk-hi3620.c index a0674ba6659e..c84ec867a91c 100644 --- a/drivers/clk/hisilicon/clk-hi3620.c +++ b/drivers/clk/hisilicon/clk-hi3620.c @@ -316,7 +316,7 @@ static int mmc_clk_determine_rate(struct clk_hw *hw, req->rate = 180000000; req->best_parent_rate = 1440000000; } - return 0; + return -EINVAL; } static u32 mmc_clk_delay(u32 val, u32 para, u32 off, u32 len) diff --git a/drivers/clk/mmp/clk-mix.c b/drivers/clk/mmp/clk-mix.c index 7a37432761f9..665cb6794639 100644 --- a/drivers/clk/mmp/clk-mix.c +++ b/drivers/clk/mmp/clk-mix.c @@ -218,7 +218,7 @@ static int mmp_clk_mix_determine_rate(struct clk_hw *hw, parent = NULL; mix_rate_best = 0; parent_rate_best = 0; - gap_best = req->rate; + gap_best = ULONG_MAX; parent_best = NULL; if (mix->table) { @@ -262,6 +262,9 @@ static int mmp_clk_mix_determine_rate(struct clk_hw *hw, } found: + if (!parent_best) + return -EINVAL; + req->best_parent_rate = parent_rate_best; req->best_parent_hw = __clk_get_hw(parent_best); req->rate = mix_rate_best; diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c index 7a485870991d..94e2570a2409 100644 --- a/drivers/clk/sunxi/clk-factors.c +++ b/drivers/clk/sunxi/clk-factors.c @@ -107,8 +107,10 @@ static int clk_factors_determine_rate(struct clk_hw *hw, } } - if (best_parent) - req->best_parent_hw = __clk_get_hw(best_parent); + if (!best_parent) + return -EINVAL; + + req->best_parent_hw = __clk_get_hw(best_parent); req->best_parent_rate = best; req->rate = best_child_rate; diff --git a/drivers/clk/sunxi/clk-sun6i-ar100.c b/drivers/clk/sunxi/clk-sun6i-ar100.c index d70c1ea345db..21b076ee59d1 100644 --- a/drivers/clk/sunxi/clk-sun6i-ar100.c +++ b/drivers/clk/sunxi/clk-sun6i-ar100.c @@ -105,6 +105,9 @@ static int ar100_determine_rate(struct clk_hw *hw, } } + if (best_rate < 0) + return best_rate; + req->rate = best_rate; return 0; diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c index d0f72a151bf1..0e15165280dc 100644 --- a/drivers/clk/sunxi/clk-sunxi.c +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -146,8 +146,10 @@ static int sun6i_ahb1_clk_determine_rate(struct clk_hw *hw, } } - if (best_parent) - req->best_parent_hw = __clk_get_hw(best_parent); + if (!best_parent) + return -EINVAL; + + req->best_parent_hw = __clk_get_hw(best_parent); req->best_parent_rate = best; req->rate = best_child_rate; -- GitLab