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Date: Wed, 6 May 2020 23:56:35 +0300 From: Grygorii Strashko <grygorii.strashko@...com> To: Clay McClure <clay@...mons.net> CC: Arnd Bergmann <arnd@...db.de>, kbuild test robot <lkp@...el.com>, Russell King <linux@...linux.org.uk>, Tony Lindgren <tony@...mide.com>, "David S. Miller" <davem@...emloft.net>, Murali Karicheri <m-karicheri2@...com>, Nicolas Ferre <nicolas.ferre@...rochip.com>, Krzysztof Kozlowski <krzk@...nel.org>, Andrew Jeffery <andrew@...id.au>, Santosh Shilimkar <santosh.shilimkar@...cle.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, Ilias Apalodimas <ilias.apalodimas@...aro.org>, Jesper Dangaard Brouer <brouer@...hat.com>, Thomas Gleixner <tglx@...utronix.de>, Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>, Jakub Kicinski <kuba@...nel.org>, Kees Cook <keescook@...omium.org>, Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@...el.com>, Richard Cochran <richardcochran@...il.com>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>, <netdev@...r.kernel.org> Subject: Re: [PATCH v2] net: ethernet: ti: Remove TI_CPTS_MOD workaround On 06/05/2020 09:51, Clay McClure wrote: > On Tue, May 05, 2020 at 10:41:26AM +0300, Grygorii Strashko wrote: > >> It's better if you send v2 not as reply to v1. > > Noted, thank you, and thank you for taking the time to review my patch. > >> just to clarify. After these two patches >> - the PTP_1588_CLOCK can still be set to "M" >> - which will cause TI_CPTS to be "M", >> - but TI_CPSW will still be "Y". >> >> and all above will build and produce built-in CPSW without CPTS support >> and cpts.ko which is loadable, but not functional. >> >> Sorry, I'm a little bit lost regarding the target you'are trying to achieve. >> At least previously "imply PTP_1588_CLOCK" allowed to select properly PTP_1588_CLOCK >> without modifying every defconfig. > > Well, I just wanted to squelch a WARN_ON(). As Arnd pointed out in [1], > code that uses the stubbed cpts functions is supposed to gracefully > handle receiving a null pointer. Splatting a warning is not graceful, > and that's what I was trying to fix. > > But your question in [2] prompted me to consider whether it should be > possible to build TI_CPTS without PTP_1588_CLOCK at all. I think the > answer is no, so I tried to fix it, but you're right, it's still > possible to end up with a nonfunctional module after my patch. > > If you prefer to revert, that's fine with me. Should I post a patch, or > just ask David to revert? > Ok. After some thinking and hence you commit b6d49cab44b5 ("net: Make PTP-specific drivers depend on PTP_1588_CLOCK") seems was merged in net (not net-next) 1) for-net: defconfig changes can be separated to fix build fail, but add change for multi_v7_defconfig 2) for-net-next: rest of changes plus below diff on top of it diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig index f3f8bb724294..62f809b67469 100644 --- a/drivers/net/ethernet/ti/Kconfig +++ b/drivers/net/ethernet/ti/Kconfig @@ -49,6 +49,7 @@ config TI_CPSW_PHY_SEL config TI_CPSW tristate "TI CPSW Switch Support" depends on ARCH_DAVINCI || ARCH_OMAP2PLUS || COMPILE_TEST + depends on TI_CPTS || !TI_CPTS select TI_DAVINCI_MDIO select MFD_SYSCON select PAGE_POOL @@ -64,6 +65,7 @@ config TI_CPSW_SWITCHDEV tristate "TI CPSW Switch Support with switchdev" depends on ARCH_DAVINCI || ARCH_OMAP2PLUS || COMPILE_TEST depends on NET_SWITCHDEV + depends on TI_CPTS || !TI_CPTS select PAGE_POOL select TI_DAVINCI_MDIO select MFD_SYSCON @@ -78,11 +80,9 @@ config TI_CPSW_SWITCHDEV config TI_CPTS tristate "TI Common Platform Time Sync (CPTS) Support" - depends on TI_CPSW || TI_KEYSTONE_NETCP || TI_CPSW_SWITCHDEV || COMPILE_TEST + depends on ARCH_OMAP2PLUS || ARCH_KEYSTONE || COMPILE_TEST depends on COMMON_CLK depends on PTP_1588_CLOCK - default y if TI_CPSW=y || TI_KEYSTONE_NETCP=y || TI_CPSW_SWITCHDEV=y - default m ---help--- This driver supports the Common Platform Time Sync unit of the CPSW Ethernet Switch and Keystone 2 1g/10g Switch Subsystem. @@ -109,6 +109,7 @@ config TI_KEYSTONE_NETCP select TI_DAVINCI_MDIO depends on OF depends on KEYSTONE_NAVIGATOR_DMA && KEYSTONE_NAVIGATOR_QMSS + depends on TI_CPTS || !TI_CPTS ---help--- This driver supports TI's Keystone NETCP Core. It should properly resolve "M" vs "Y" dependencies between PTP_1588_CLOCK->TI_CPTS->TI_CPSW On thing, TI_CPTS can be selected without TI_CPSW, but it's probably ok. -- Best regards, grygorii
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