Messages in this thread Patch in this message |  | | From | Tony Lindgren <> | Subject | [PATCH 1/2] ARM: OMAP2+: Fix ti_sysc_find_one_clockdomain to check for to_clk_hw_omap | Date | Mon, 16 Dec 2019 16:09:05 -0800 |
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We must bail out early if the clock is not hw_omap. Otherwise we will try to access invalid address with hwclk->clkdm_name:
Unable to handle kernel paging request at virtual address ffffffff Internal error: Oops: 27 [#1] ARM ... (strcmp) from [<c011b348>] (clkdm_lookup+0x40/0x60) [<c011b348>] (clkdm_lookup) from [<c011cb84>] (ti_sysc_clkdm_init+0x5c/0x64) [<c011cb84>] (ti_sysc_clkdm_init) from [<c03680a8>] (sysc_probe+0x948/0x117c) [<c03680a8>] (sysc_probe) from [<c03d0af4>] (platform_drv_probe+0x48/0x98) ...
Fixes: 2b2f7def058a ("bus: ti-sysc: Add support for missing clockdomain handling") Signed-off-by: Tony Lindgren <tony@atomide.com> --- arch/arm/mach-omap2/pdata-quirks.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c --- a/arch/arm/mach-omap2/pdata-quirks.c +++ b/arch/arm/mach-omap2/pdata-quirks.c @@ -306,10 +306,14 @@ static void __init dra7x_evm_mmc_quirk(void) static struct clockdomain *ti_sysc_find_one_clockdomain(struct clk *clk) { + struct clk_hw *hw = __clk_get_hw(clk); struct clockdomain *clkdm = NULL; struct clk_hw_omap *hwclk; - hwclk = to_clk_hw_omap(__clk_get_hw(clk)); + hwclk = to_clk_hw_omap(hw); + if (!omap2_clk_is_hw_omap(hw)) + return NULL; + if (hwclk && hwclk->clkdm_name) clkdm = clkdm_lookup(hwclk->clkdm_name); -- 2.24.1
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