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| author | Paul Walmsley <paul@pwsan.com> | 2009-01-28 12:35:31 -0700 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-02-08 17:50:47 +0000 |
| commit | 883992bd8f6924c9aa849f2dac381075e2e55a9d (patch) | |
| tree | 30440178d023c8e1334e4e46aa0965906044792d /arch/arm | |
| parent | 8263e5b31eae2bbf689ff08a7da334329c9f353b (diff) | |
| download | blackbird-op-linux-883992bd8f6924c9aa849f2dac381075e2e55a9d.tar.gz blackbird-op-linux-883992bd8f6924c9aa849f2dac381075e2e55a9d.zip | |
[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 <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-omap2/clock24xx.c | 12 | ||||
| -rw-r--r-- | 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 1a885976c257..069f3e1827a6 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 a853b1e149ee..3b6e27bc9fe3 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; } |
