linux-kernel - Re: [PATCH 4.4 038/134] ARM: DRA7: hwmod_data: Prevent wait_target_disable error for usb_otg

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Date:   Tue, 20 Mar 2018 16:08:09 +0800
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Tero Kristo <t-kristo@...com>, Roger Quadros <rogerq@...com>,
        Tony Lindgren <tony@...mide.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: Re: [PATCH 4.4 038/134] ARM: DRA7: hwmod_data: Prevent
 wait_target_disable error for usb_otg_ss

On 20 March 2018 at 15:42, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
> On Tue, Mar 20, 2018 at 07:52:51AM +0800, Dan Rue wrote:
>> On Mon, Mar 19, 2018 at 07:05:21PM +0100, Greg Kroah-Hartman wrote:
>> > 4.4-stable review patch.  If anyone has any objections, please let me know.
>> >
>> > ------------------
>> >
>> > From: Roger Quadros <rogerq@...com>
>> >
>> >
>> > [ Upstream commit e2d54fe76997301b49311bde7ba8ef52b47896f9 ]
>> >
>> > It seems that if L3_INIT clkdomain is kept in HW_AUTO while usb_otg_ss
>> > is in use then there are random chances that the usb_otg_ss module
>> > will fail to completely idle. i.e. IDLEST = 0x2 instead of 0x3.
>> >
>> > Preventing L3_INIT from HW_AUTO while usb_otg_ss module is in use
>> > fixes this issue.
>> >
>> > We don't know yet if usb_otg_ss instances 3 and 4 are affected by this
>> > issue or not so don't add this flag for those instances.
>> >
>> > Cc: Tero Kristo <t-kristo@...com>
>> > Signed-off-by: Roger Quadros <rogerq@...com>
>> > Signed-off-by: Tony Lindgren <tony@...mide.com>
>> > Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
>> > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>>
>> This fails to build for me on arm32 with default config.
>>
>> #
>> # make -j10 -k -s ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- O=build-arm multi_v7_defconfig
>> #
>> #
>> # make -j10 -k -s ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- O=build-arm
>> #
>> ../arch/arm/mach-omap2/omap_hwmod_7xx_data.c:2243:12: error: 'HWMOD_CLKDM_NOAUTO' undeclared here (not in a function)
>>   .flags  = HWMOD_CLKDM_NOAUTO,
>>             ^
>> ../scripts/Makefile.build:269: recipe for target 'arch/arm/mach-omap2/omap_hwmod_7xx_data.o' failed
>> make[2]: *** [arch/arm/mach-omap2/omap_hwmod_7xx_data.o] Error 1
>> make[2]: Target '__build' not remade because of errors.
>> /home/buildslave/workspace/kernel-single-defconfig-builder/defconfig/multi_v7_defconfig/label/builder/Makefile:969: recipe for target 'arch/arm/mach-omap2' failed
>> make[1]: *** [arch/arm/mach-omap2] Error 2
>> make[1]: Target '_all' not remade because of errors.
>> Makefile:152: recipe for target 'sub-make' failed
>> make: *** [sub-make] Error 2
>> make: Target '_all' not remade because of errors.
>
> I've dropped the patch that caused this problem now, will push out a
> -rc2 in a few minutes, thanks.
>

Didn't see that conversation and sent series to fix this problem.
Probably to drop that patch is a better solution. In that case please
just ignore my series.

Thanks!

> greg k-h