From 883992bd8f6924c9aa849f2dac381075e2e55a9d Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Wed, 28 Jan 2009 12:35:31 -0700 Subject: [PATCH] [ARM] OMAP2/3 clock: don't tinker with hardirqs when they are supposed to be disabled Clock rate change code executes inside a spinlock with hardirqs disabled. The only code that should be messing around with the hardirq state should be the plat-omap/clock.c code. In the omap2_reprogram_dpllcore() case, this probably just wastes cycles, but in the omap3_core_dpll_m2_set_rate() case, this is a nasty bug. linux-omap source commit is b9b6208dadb5e0d8b290900a3ffa911673ca97ed. Signed-off-by: Paul Walmsley Signed-off-by: Tony Lindgren Signed-off-by: Russell King --- arch/arm/mach-omap2/clock24xx.c | 12 +++--------- arch/arm/mach-omap2/clock34xx.c | 2 -- 2 files changed, 3 insertions(+), 11 deletions(-) diff --git a/arch/arm/mach-omap2/clock24xx.c b/arch/arm/mach-omap2/clock24xx.c index 1a885976c25..069f3e1827a 100644 --- a/arch/arm/mach-omap2/clock24xx.c +++ b/arch/arm/mach-omap2/clock24xx.c @@ -380,10 +380,7 @@ static int omap2_reprogram_dpllcore(struct clk *clk, unsigned long rate) u32 bypass = 0; struct prcm_config tmpset; const struct dpll_data *dd; - unsigned long flags; - int ret = -EINVAL; - local_irq_save(flags); cur_rate = omap2_get_dpll_rate_24xx(&dpll_ck); mult = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2); mult &= OMAP24XX_CORE_CLK_SRC_MASK; @@ -395,7 +392,7 @@ static int omap2_reprogram_dpllcore(struct clk *clk, unsigned long rate) } else if (rate != cur_rate) { valid_rate = omap2_dpllcore_round_rate(rate); if (valid_rate != rate) - goto dpll_exit; + return -EINVAL; if (mult == 1) low = curr_prcm_set->dpll_speed; @@ -404,7 +401,7 @@ static int omap2_reprogram_dpllcore(struct clk *clk, unsigned long rate) dd = clk->dpll_data; if (!dd) - goto dpll_exit; + return -EINVAL; tmpset.cm_clksel1_pll = __raw_readl(dd->mult_div1_reg); tmpset.cm_clksel1_pll &= ~(dd->mult_mask | @@ -441,11 +438,8 @@ static int omap2_reprogram_dpllcore(struct clk *clk, unsigned long rate) omap2xxx_sdrc_init_params(omap2xxx_sdrc_dll_is_unlocked()); omap2xxx_sdrc_reprogram(done_rate, 0); } - ret = 0; -dpll_exit: - local_irq_restore(flags); - return(ret); + return 0; } /** diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c index a853b1e149e..3b6e27bc9fe 100644 --- a/arch/arm/mach-omap2/clock34xx.c +++ b/arch/arm/mach-omap2/clock34xx.c @@ -686,10 +686,8 @@ static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate) WARN_ON(new_div != 1 && new_div != 2); /* REVISIT: Add SDRC_MR changing to this code also */ - local_irq_disable(); omap3_configure_core_dpll(sp->rfr_ctrl, sp->actim_ctrla, sp->actim_ctrlb, new_div); - local_irq_enable(); return 0; } -- 2.41.0