diff options
author | Tony Lindgren <tony@atomide.com> | 2019-12-17 01:41:53 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-23 10:22:30 +0300 |
commit | 02f76b65e0609cbc1b3f399c8757caa7331ccb0b (patch) | |
tree | 66aef2e5c1cd130fcf63535c44edc4ee8c36dced | |
parent | bcd68cdc69847979b2ae233714cf09bcb9b5dcf3 (diff) | |
download | linux-02f76b65e0609cbc1b3f399c8757caa7331ccb0b.tar.xz |
ARM: OMAP2+: Fix ti_sysc_find_one_clockdomain to check for to_clk_hw_omap
commit 90bdfa0b05e3cc809a7c1aa3b1f162b46ea1b330 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | arch/arm/mach-omap2/pdata-quirks.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c index 1b7cf81ff035..33688e1d9acf 100644 --- a/arch/arm/mach-omap2/pdata-quirks.c +++ b/arch/arm/mach-omap2/pdata-quirks.c @@ -368,10 +368,14 @@ 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); |