From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Marek Vasut <marex@denx.de>
Cc: Christophe Kerello <christophe.kerello@st.com>,
richard@nod.at, vigneshr@ti.com, lee.jones@linaro.org,
robh+dt@kernel.org, mark.rutland@arm.com, tony@atomide.com,
linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
devicetree@vger.kernel.org
Subject: Re: [PATCH v2 04/12] mtd: rawnand: stm32_fmc2: manage all errors cases at probe time
Date: Mon, 27 Apr 2020 22:08:06 +0200 [thread overview]
Message-ID: <20200427220806.13741ec0@xps13> (raw)
In-Reply-To: <3527f3b8-225d-6e5a-dd8a-0421d475f70b@denx.de>
Hi Marek,
Marek Vasut <marex@denx.de> wrote on Mon, 27 Apr 2020 21:46:44 +0200:
> On 4/27/20 8:08 PM, Miquel Raynal wrote:
> [...]
> >>>> /* FMC2 init routine */
> >>>> stm32_fmc2_init(fmc2);
> >>>> @@ -1997,7 +2001,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
> >>>> /* Scan to find existence of the device */
> >>>> ret = nand_scan(chip, nand->ncs);
> >>>> if (ret)
> >>>> - goto err_scan;
> >>>> + goto err_dma_setup;
> >>>>
> >>>> ret = mtd_device_register(mtd, NULL, 0);
> >>>> if (ret)
> >>>> @@ -2010,7 +2014,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
> >>>> err_device_register:
> >>>> nand_cleanup(chip);
> >>>>
> >>>> -err_scan:
> >>>> +err_dma_setup:
> >>>> if (fmc2->dma_ecc_ch)
> >>>> dma_release_channel(fmc2->dma_ecc_ch);
> >>>> if (fmc2->dma_tx_ch)
> >>>> @@ -2021,6 +2025,7 @@ static int stm32_fmc2_probe(struct platform_device *pdev)
> >>>> sg_free_table(&fmc2->dma_data_sg);
> >>>> sg_free_table(&fmc2->dma_ecc_sg);
> >>>>
> >>>> +err_clk_disable:
> >>>> clk_disable_unprepare(fmc2->clk);
> >>>>
> >>>> return ret;
> >>>
> >>> I didn't spot it during my earlier reviews but I really prefer using
> >>> labels explaining what you do than having the same name of the function
> >>> which failed. This way you don't have to rework the error path when
> >>> you handle an additional error.
> >>>
> >>> So, would you mind doing this in two steps:
> >>>
> >>> 1/
> >>> Replace
> >>>
> >>> err_scan:
> >>>
> >>> with, eg.
> >>>
> >>> release_dma_objs:
> >>
> >> The ^err_ prefix in failpath labels is useful, since it's easily
> >> possible to match on it with regexes ; not so much on arbitrary label name.
> >
> > I guess so, but is it actually useful to catch labels in a regex? (real
> > question)
>
> I find it useful to have a unified way to find those labels, e.g.
> err_because_foo:
> err_because_bar:
> err_last_one:
> is much nicer than:
> foo_failed:
> bar_also_failed:
> its_total_randomness:
My point being, Christophe, you can use err_ as a prefix but I think
it's better to use:
err_do_this_cleanup
than
err_this_failed
>
> > Any way I suppose catching ":\n" is already a good approximation to
> > find labels?
>
> Not very practical with git grep (^err.*: works nicely though)
I suppose ^.*:$ would work the same ;)
>
> >> btw would it make sense to split the first three patches of this series
> >> into a separate series ? This rawnand part seems more like an unrelated
> >> cleanup.
> >
> > As it seems that the MFD discussion can take longer, then I would say
> > yes, at least for the cleanup/misc changes part.
> Right
>
Cheers,
Miquèl
next prev parent reply other threads:[~2020-04-27 20:08 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-15 15:57 [PATCH v2 00/12] add STM32 FMC2 controller drivers Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 01/12] dt-bindings: mfd: stm32-fmc2: add STM32 FMC2 controller documentation Christophe Kerello
2020-04-28 15:28 ` Rob Herring
2020-04-29 9:35 ` Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 02/12] mfd: stm32-fmc2: add STM32 FMC2 controller driver Christophe Kerello
2020-04-24 7:45 ` Lee Jones
2020-04-24 10:27 ` Marek Vasut
2020-04-24 10:50 ` Lee Jones
2020-04-24 11:06 ` Marek Vasut
2020-04-24 11:47 ` Christophe Kerello
2020-04-24 14:50 ` Lee Jones
2020-04-24 15:14 ` Boris Brezillon
2020-04-24 16:42 ` Christophe Kerello
2020-04-24 17:22 ` Boris Brezillon
2020-04-24 17:34 ` Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 03/12] bus: stm32-fmc2-ebi: add STM32 FMC2 EBI " Christophe Kerello
2020-04-16 19:53 ` Boris Brezillon
2020-04-17 15:29 ` Christophe Kerello
2020-04-17 15:31 ` Marek Vasut
2020-04-17 15:41 ` Boris Brezillon
2020-04-17 15:44 ` Marek Vasut
2020-04-15 15:57 ` [PATCH v2 04/12] mtd: rawnand: stm32_fmc2: manage all errors cases at probe time Christophe Kerello
2020-04-27 17:47 ` Miquel Raynal
2020-04-27 17:59 ` Marek Vasut
2020-04-27 18:08 ` Miquel Raynal
2020-04-27 19:46 ` Marek Vasut
2020-04-27 20:08 ` Miquel Raynal [this message]
2020-04-27 20:10 ` Marek Vasut
2020-04-29 8:00 ` Christophe Kerello
2020-04-29 9:07 ` Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 05/12] mtd: rawnand: stm32_fmc2: remove useless inline comments Christophe Kerello
2020-04-27 17:48 ` Miquel Raynal
2020-04-15 15:57 ` [PATCH v2 06/12] mtd: rawnand: stm32_fmc2: use FMC2_TIMEOUT_MS for timeouts Christophe Kerello
2020-04-27 18:22 ` Miquel Raynal
2020-04-29 9:27 ` Christophe Kerello
2020-04-29 9:35 ` Miquel Raynal
2020-04-29 9:41 ` Christophe Kerello
2020-04-29 10:06 ` Miquel Raynal
2020-04-29 10:13 ` Christophe Kerello
2020-04-29 10:27 ` Miquel Raynal
2020-04-15 15:57 ` [PATCH v2 07/12] mtd: rawnand: stm32_fmc2: cleanup Christophe Kerello
2020-04-27 18:33 ` Miquel Raynal
2020-04-29 9:31 ` Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 08/12] mtd: rawnand: stm32_fmc2: use FIELD_PREP/FIELD_GET macros Christophe Kerello
2020-04-16 19:45 ` Boris Brezillon
2020-04-27 18:50 ` Miquel Raynal
2020-04-15 15:57 ` [PATCH v2 09/12] mtd: rawnand: stm32_fmc2: move all registers Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 10/12] mtd: rawnand: stm32_fmc2: use regmap APIs Christophe Kerello
2020-04-27 18:52 ` Miquel Raynal
2020-04-15 15:57 ` [PATCH v2 11/12] mtd: rawnand: stm32_fmc2: use stm32_fmc2 structure in nfc controller Christophe Kerello
2020-04-15 15:57 ` [PATCH v2 12/12] mtd: rawnand: stm32_fmc2: add new MP1 compatible string Christophe Kerello
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