From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Wenyou Yang <wenyou.yang@microchip.com>,
Josh Wu <rainyfeeling@outlook.com>,
Tudor Ambarus <Tudor.Ambarus@microchip.com>,
Boris Brezillon <boris.brezillon@bootlin.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
David Woodhouse <dwmw2@infradead.org>,
Brian Norris <computersforpeace@gmail.com>,
Marek Vasut <marek.vasut@gmail.com>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Kamal Dasu <kdasu.kdev@gmail.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Han Xu <han.xu@nxp.com>, Harvey Hunt <harveyhuntnexus@gmail.com>,
Vladimir Zapolskiy <vz@mleia.com>,
Sylvain Lemieux <slemieux.tyco@gmail.com>,
Xiaolei Li <xiaolei.li@mediatek.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Chen-Yu Tsai <wens@csie.org>,
Marc Gonzalez <marc.w.gonzalez@free.fr>,
Mans Rullgard <mans@mansr.com>, Stefan Agner <stefan@agner.ch>
Cc: linux-mtd@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com,
linux-mediatek@lists.infradead.org
Subject: Re: [PATCH v4 00/35] Allow dynamic allocations during NAND chip identification phase
Date: Fri, 27 Jul 2018 01:34:06 +0200 [thread overview]
Message-ID: <20180727013406.7749cbfd@xps13> (raw)
In-Reply-To: <20180720151527.16038-1-miquel.raynal@bootlin.com>
Miquel Raynal <miquel.raynal@bootlin.com> wrote on Fri, 20 Jul 2018
17:14:52 +0200:
> Hello,
>
> This series make a quite deep change in the NAND framework. Until now,
> the NAND chip identification phase could be done in two manners from the
> controller driver perspective:
>
> 1/ Call nand_scan()
>
> or
>
> 1/ Call nand_scan_ident()
> 2/ Do some controller-dependent configuration
> 3/ Call nand_scan_tail().
>
> The fact that the identifaction could be split in two operations
> involved that in the NAND framework, it was not possible to do any
> dynamic allocation without risking a memory leak. What if the core
> allocates a structure, then the driver between nand_scan_ident() and
> nand_scan_tail() decides it cannot handle the chip and errors out?
> The structure allocated by the core is lost: it is a memory leak. One
> solution could have been to add a nand_scan_ident_cleanup() function,
> but that would mean patching all the drivers anyway to make them call
> this function when something fails between nand_scan_ident() and
> nand_scan_tail().
>
> To avoid this situation, we migrate all drivers to use nand_scan() in
> conjuction with the recently added hooks ->attach_chip() and
> ->detach_chip() that are part of the nand_controller structure
> operations. Drivers that need to tweak their configuration after
> nand_scan_ident() should implement it. Any dynamically allocated space
> in ->attach_chip() must be freed in the second hook: ->detach_chip().
>
> The ->detach_chip() does not have to be called upon error in the
> controller driver probe function. The nand_cleanup() helper already
> exists for that and will do the call if needed. Of course, this helper
> must be called on error after a successful nand_scan(), just like
> before.
>
> Once all drivers not using nand_scan() are migrated, nand_scan_ident()
> and nand_scan_tail() are unexported and only available internally.
>
> A previous work [1] removed the ONFI/JEDEC parameter pages and instead
> allocated a nand_parameters structure in nand_chip, embedding both
> generic entries and ONFI-related ones. The deal was, once dynamic
> allocation possible, allocate in nand_scan_ident() the ONFI strcuture
> only if actually needed. This is done in the last patches.
>
> This series applies on top of nand/next.
>
> Thank you,
> Miquèl
>
> [1] http://lists.infradead.org/pipermail/linux-mtd/2018-March/079456.html
>
> Changes since v3:
> =================
> * Constified all the nand_controller_ops structure definitions.
> * Fixed a build issue in fsl_elbc.
> * Added a patch in the core to prevent executing nand_scan_ident if
> maxchips is NULL.
> * Fixed the regression around the model name.
> * Used kstrdup to allocate the model.
> * The migration from char model[] to const char *model is done in a
> separate patch.
>
> Changes since v2:
> =================
> * Rebased on top of nand/next.
> * Adapted all drivers to declare statically a nand_controller_ops
> structure and assign it in the probe().
> * Added the migration of the tegra_nand.c driver.
> * Moved brcmnand controller ops affectation in the probe().
>
> Changes since v1:
> =================
> * Rebased on top of nand/next.
> * Light rewording of the cover letter about the possibility to have a
> nand_scan_ident_cleanup() function (just as example of how this series
> could have been done differently).
> * Changed the hooks to reside in the nand_hw_ctrl structure instead of
> being part of nand_ecc_ctrl as these hooks are more
> controller-related.
>
>
> Miquel Raynal (35):
> mtd: rawnand: brcmnand: convert driver to nand_scan()
> mtd: rawnand: cafe: convert driver to nand_scan()
> mtd: rawnand: davinci: convert driver to nand_scan()
> mtd: rawnand: denali: convert to nand_scan()
> mtd: rawnand: fsl_elbc: convert driver to nand_scan()
> mtd: rawnand: fsl_ifc: convert driver to nand_scan()
> mtd: rawnand: fsmc: convert driver to nand_scan()
> mtd: rawnand: gpmi: convert driver to nand_scan()
> mtd: rawnand: hisi504: convert driver to nand_scan()
> mtd: rawnand: jz4780: convert driver to nand_scan()
> mtd: rawnand: lpc32xx_mlc: convert driver to nand_scan()
> mtd: rawnand: lpc32xx_slc: convert driver to nand_scan()
> mtd: rawnand: marvell: convert driver to nand_scan()
> mtd: rawnand: mtk: convert driver to nand_scan()
> mtd: rawnand: mxc: convert driver to nand_scan()
> mtd: rawnand: nandsim: convert driver to nand_scan()
> mtd: rawnand: omap2: convert driver to nand_scan()
> mtd: rawnand: s3c2410: convert driver to nand_scan()
> mtd: rawnand: sh_flctl: move all NAND chip related setup in one
> function
> mtd: rawnand: sh_flctl: convert driver to nand_scan()
> mtd: rawnand: sunxi: convert driver to nand_scan()
> mtd: rawnand: tango: convert driver to nand_scan()
> mtd: rawnand: txx9ndfmc: rename nand controller internal structure
> mtd: rawnand: txx9ndfmc: convert driver to nand_scan()
> mtd: rawnand: vf610: convert driver to nand_scan()
> mtd: rawnand: atmel: convert driver to nand_scan()
> mtd: rawnand: sm_common: convert driver to nand_scan_with_ids()
> mtd: rawnand: allow exiting immediately nand_scan_ident()
> mtd: rawnand: docg4: convert driver to nand_scan()
> mtd: rawnand: qcom: convert driver to nand_scan()
> mtd: rawnand: jz4740: convert driver to nand_scan()
> mtd: rawnand: tegra: convert driver to nand_scan()
> mtd: rawnand: do not export nand_scan_[ident|tail]() anymore
> mtd: rawnand: allocate model parameter dynamically
> mtd: rawnand: allocate dynamically ONFI parameters during detection
>
> drivers/mtd/nand/raw/atmel/nand-controller.c | 83 ++---
> drivers/mtd/nand/raw/brcmnand/brcmnand.c | 47 ++-
> drivers/mtd/nand/raw/cafe_nand.c | 130 ++++---
> drivers/mtd/nand/raw/davinci_nand.c | 195 +++++-----
> drivers/mtd/nand/raw/denali.c | 138 +++----
> drivers/mtd/nand/raw/docg4.c | 55 +--
> drivers/mtd/nand/raw/fsl_elbc_nand.c | 19 +-
> drivers/mtd/nand/raw/fsl_ifc_nand.c | 19 +-
> drivers/mtd/nand/raw/fsmc_nand.c | 148 ++++----
> drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 56 +--
> drivers/mtd/nand/raw/hisi504_nand.c | 78 ++--
> drivers/mtd/nand/raw/jz4740_nand.c | 46 ++-
> drivers/mtd/nand/raw/jz4780_nand.c | 34 +-
> drivers/mtd/nand/raw/lpc32xx_mlc.c | 109 +++---
> drivers/mtd/nand/raw/lpc32xx_slc.c | 77 ++--
> drivers/mtd/nand/raw/marvell_nand.c | 205 ++++++-----
> drivers/mtd/nand/raw/mtk_nand.c | 75 ++--
> drivers/mtd/nand/raw/mxc_nand.c | 136 +++----
> drivers/mtd/nand/raw/nand_base.c | 132 +++++--
> drivers/mtd/nand/raw/nand_micron.c | 6 +-
> drivers/mtd/nand/raw/nand_timings.c | 12 +-
> drivers/mtd/nand/raw/nandsim.c | 82 +++--
> drivers/mtd/nand/raw/omap2.c | 521 +++++++++++++--------------
> drivers/mtd/nand/raw/qcom_nandc.c | 71 ++--
> drivers/mtd/nand/raw/s3c2410.c | 30 +-
> drivers/mtd/nand/raw/sh_flctl.c | 57 ++-
> drivers/mtd/nand/raw/sm_common.c | 39 +-
> drivers/mtd/nand/raw/sunxi_nand.c | 43 +--
> drivers/mtd/nand/raw/tango_nand.c | 40 +-
> drivers/mtd/nand/raw/tegra_nand.c | 162 +++++----
> drivers/mtd/nand/raw/txx9ndfmc.c | 35 +-
> drivers/mtd/nand/raw/vf610_nfc.c | 127 +++----
> include/linux/mtd/rawnand.h | 17 +-
> include/linux/mtd/sh_flctl.h | 1 +
> 34 files changed, 1612 insertions(+), 1413 deletions(-)
>
After doing the requested modifications applied to nand/next:
- 3-10, 12-16, 18-22, 25, 27, 30 from v4
- then the rest from v5.
Thanks,
Miquèl
prev parent reply other threads:[~2018-07-26 23:34 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-20 15:14 [PATCH v4 00/35] Allow dynamic allocations during NAND chip identification phase Miquel Raynal
2018-07-20 15:14 ` [PATCH v4 01/35] mtd: rawnand: brcmnand: convert driver to nand_scan() Miquel Raynal
2018-07-21 6:23 ` Boris Brezillon
2018-07-20 15:14 ` [PATCH v4 02/35] mtd: rawnand: cafe: " Miquel Raynal
2018-07-21 6:35 ` Boris Brezillon
2018-07-20 15:14 ` [PATCH v4 03/35] mtd: rawnand: davinci: " Miquel Raynal
2018-07-21 6:44 ` Boris Brezillon
2018-07-20 15:14 ` [PATCH v4 04/35] mtd: rawnand: denali: convert " Miquel Raynal
2018-07-21 6:46 ` Boris Brezillon
2018-07-25 9:42 ` Masahiro Yamada
2018-07-25 9:51 ` Boris Brezillon
2018-07-25 12:47 ` Miquel Raynal
2018-07-25 14:16 ` Masahiro Yamada
2018-07-20 15:14 ` [PATCH v4 05/35] mtd: rawnand: fsl_elbc: convert driver " Miquel Raynal
2018-07-21 6:50 ` Boris Brezillon
2018-07-20 15:14 ` [PATCH v4 06/35] mtd: rawnand: fsl_ifc: " Miquel Raynal
2018-07-21 6:53 ` Boris Brezillon
2018-07-20 15:14 ` [PATCH v4 07/35] mtd: rawnand: fsmc: " Miquel Raynal
2018-07-21 6:55 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 08/35] mtd: rawnand: gpmi: " Miquel Raynal
2018-07-21 6:56 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 09/35] mtd: rawnand: hisi504: " Miquel Raynal
2018-07-21 6:59 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 10/35] mtd: rawnand: jz4780: " Miquel Raynal
2018-07-21 15:23 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 11/35] mtd: rawnand: lpc32xx_mlc: " Miquel Raynal
2018-07-21 15:26 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 12/35] mtd: rawnand: lpc32xx_slc: " Miquel Raynal
2018-07-21 15:27 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 13/35] mtd: rawnand: marvell: " Miquel Raynal
2018-07-21 16:57 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 14/35] mtd: rawnand: mtk: " Miquel Raynal
2018-07-21 17:10 ` Boris Brezillon
2018-07-26 6:06 ` xiaolei li
2018-07-26 6:14 ` Boris Brezillon
2018-07-26 6:46 ` xiaolei li
2018-07-26 6:49 ` Miquel Raynal
2018-07-26 6:53 ` xiaolei li
2018-07-20 15:15 ` [PATCH v4 15/35] mtd: rawnand: mxc: " Miquel Raynal
2018-07-21 17:19 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 16/35] mtd: rawnand: nandsim: " Miquel Raynal
2018-07-21 17:21 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 17/35] mtd: rawnand: omap2: " Miquel Raynal
2018-07-21 17:34 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 18/35] mtd: rawnand: s3c2410: " Miquel Raynal
2018-07-21 17:38 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 19/35] mtd: rawnand: sh_flctl: move all NAND chip related setup in one function Miquel Raynal
2018-07-21 17:48 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 20/35] mtd: rawnand: sh_flctl: convert driver to nand_scan() Miquel Raynal
2018-07-21 17:49 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 21/35] mtd: rawnand: sunxi: " Miquel Raynal
2018-07-21 17:50 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 22/35] mtd: rawnand: tango: " Miquel Raynal
2018-07-21 17:52 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 23/35] mtd: rawnand: txx9ndfmc: rename nand controller internal structure Miquel Raynal
2018-07-21 17:53 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 24/35] mtd: rawnand: txx9ndfmc: convert driver to nand_scan() Miquel Raynal
2018-07-21 17:54 ` Boris Brezillon
2018-07-21 18:04 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 25/35] mtd: rawnand: vf610: " Miquel Raynal
2018-07-21 18:05 ` Boris Brezillon
2018-07-25 8:57 ` Stefan Agner
2018-07-20 15:15 ` [PATCH v4 26/35] mtd: rawnand: atmel: " Miquel Raynal
2018-07-22 6:40 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 27/35] mtd: rawnand: sm_common: convert driver to nand_scan_with_ids() Miquel Raynal
2018-07-22 6:44 ` Boris Brezillon
2018-07-26 19:06 ` Boris Brezillon
2018-07-26 23:13 ` Miquel Raynal
2018-07-20 15:15 ` [PATCH v4 28/35] mtd: rawnand: allow exiting immediately nand_scan_ident() Miquel Raynal
2018-07-22 8:49 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 29/35] mtd: rawnand: docg4: convert driver to nand_scan() Miquel Raynal
2018-07-22 8:52 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 30/35] mtd: rawnand: qcom: " Miquel Raynal
2018-07-22 8:59 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 31/35] mtd: rawnand: jz4740: " Miquel Raynal
2018-07-22 9:29 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 32/35] mtd: rawnand: tegra: " Miquel Raynal
2018-07-22 9:31 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 33/35] mtd: rawnand: do not export nand_scan_[ident|tail]() anymore Miquel Raynal
2018-07-22 10:30 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 34/35] mtd: rawnand: allocate model parameter dynamically Miquel Raynal
2018-07-22 10:32 ` Boris Brezillon
2018-07-20 15:15 ` [PATCH v4 35/35] mtd: rawnand: allocate dynamically ONFI parameters during detection Miquel Raynal
2018-07-22 10:35 ` Boris Brezillon
2018-07-26 23:34 ` Miquel Raynal [this message]
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