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| author | Tony Lindgren <tony@atomide.com> | 2019-09-05 13:01:29 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2019-09-05 13:01:29 -0700 |
| commit | 2783d0638a51e8dba6319d9f4a2b445995a4fad1 (patch) | |
| tree | 92dd0da42fa8bf07290c0488e26e43cadb1d9ea4 | |
| parent | d098913a10f8ef8e6043765d7f2fa552527d9c42 (diff) | |
| download | linux-2783d0638a51e8dba6319d9f4a2b445995a4fad1.tar.gz linux-2783d0638a51e8dba6319d9f4a2b445995a4fad1.tar.bz2 linux-2783d0638a51e8dba6319d9f4a2b445995a4fad1.zip | |
bus: ti-sysc: Fix handling of invalid clocks
We can currently get "Unable to handle kernel paging request at
virtual address" for invalid clocks with dts node but no driver:
(__clk_get_hw) from [<c0138ebc>] (ti_sysc_find_one_clockdomain+0x18/0x34)
(ti_sysc_find_one_clockdomain) from [<c0138f0c>] (ti_sysc_clkdm_init+0x34/0xdc)
(ti_sysc_clkdm_init) from [<c0584660>] (sysc_probe+0xa50/0x10e8)
(sysc_probe) from [<c065c6ac>] (platform_drv_probe+0x58/0xa8)
Let's add IS_ERR checks to ti_sysc_clkdm_init() as And let's start treating
clk_get() with -ENOENT as a proper error. If the clock name is specified
in device tree we must succeed with clk_get() to continue. For modules with
no clock names specified in device tree we will just ignore the clocks.
Fixes: 2b2f7def058a ("bus: ti-sysc: Add support for missing clockdomain handling")
Acked-by: Roger Quadros <rogerq@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
| -rw-r--r-- | arch/arm/mach-omap2/pdata-quirks.c | 4 | ||||
| -rw-r--r-- | drivers/bus/ti-sysc.c | 5 |
2 files changed, 3 insertions, 6 deletions
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c index 6c6f8fce854e..d942a3357090 100644 --- a/arch/arm/mach-omap2/pdata-quirks.c +++ b/arch/arm/mach-omap2/pdata-quirks.c @@ -491,11 +491,11 @@ static int ti_sysc_clkdm_init(struct device *dev, struct clk *fck, struct clk *ick, struct ti_sysc_cookie *cookie) { - if (fck) + if (!IS_ERR(fck)) cookie->clkdm = ti_sysc_find_one_clockdomain(fck); if (cookie->clkdm) return 0; - if (ick) + if (!IS_ERR(ick)) cookie->clkdm = ti_sysc_find_one_clockdomain(ick); if (cookie->clkdm) return 0; diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index da88de487792..24583d82b584 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -280,9 +280,6 @@ static int sysc_get_one_clock(struct sysc *ddata, const char *name) ddata->clocks[index] = devm_clk_get(ddata->dev, name); if (IS_ERR(ddata->clocks[index])) { - if (PTR_ERR(ddata->clocks[index]) == -ENOENT) - return 0; - dev_err(ddata->dev, "clock get error for %s: %li\n", name, PTR_ERR(ddata->clocks[index])); @@ -357,7 +354,7 @@ static int sysc_get_clocks(struct sysc *ddata) continue; error = sysc_get_one_clock(ddata, name); - if (error && error != -ENOENT) + if (error) return error; } |