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From: Liang Yang <liang.yang@amlogic.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
	<linux-amlogic@lists.infradead.org>,
	<linux-mtd@lists.infradead.org>, <richard@nod.at>,
	<miquel.raynal@bootlin.com>
Cc: jianxin.pan@amlogic.com, bbrezillon@kernel.org,
	linux-kernel@vger.kernel.org, marek.vasut@gmail.com,
	computersforpeace@gmail.com, dwmw2@infradead.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 4/4] mtd: rawnand: meson: only initialize the RB completion once
Date: Mon, 15 Apr 2019 14:04:28 +0800	[thread overview]
Message-ID: <bd1900db-7ca1-a6e5-39f9-db54e0b570dd@amlogic.com> (raw)
In-Reply-To: <20190411220056.19109-5-martin.blumenstingl@googlemail.com>


On 2019/4/12 6:00, Martin Blumenstingl wrote:
> Documentation/scheduler/completion.txt states:
>    Calling init_completion() on the same completion object twice is
>    most likely a bug as it re-initializes the queue to an empty queue and
>    enqueued tasks could get "lost" - use reinit_completion() in that case,
>    but be aware of other races.
> 
> Initialize nfc->completion in meson_nfc_probe using init_completion and
> change the call in meson_nfc_queue_rb to reinit_completion so the logic
> matches what the documentation suggests.
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> ---
>   drivers/mtd/nand/raw/meson_nand.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
> index 57cc4bd3f665..ea57ddcec41e 100644
> --- a/drivers/mtd/nand/raw/meson_nand.c
> +++ b/drivers/mtd/nand/raw/meson_nand.c
> @@ -400,7 +400,7 @@ static int meson_nfc_queue_rb(struct meson_nfc *nfc, int timeout_ms)
>   	cfg |= NFC_RB_IRQ_EN;
>   	writel(cfg, nfc->reg_base + NFC_REG_CFG);
>   
> -	init_completion(&nfc->completion);
> +	reinit_completion(&nfc->completion);
Tested-by:Liang Yang <liang.yang@amlogic.com>
Acked-by: Liang Yang <liang.yang@amlogic.com>
>   
>   	/* use the max erase time as the maximum clock for waiting R/B */
>   	cmd = NFC_CMD_RB | NFC_CMD_RB_INT
> @@ -1380,6 +1380,7 @@ static int meson_nfc_probe(struct platform_device *pdev)
>   
>   	nand_controller_init(&nfc->controller);
>   	INIT_LIST_HEAD(&nfc->chips);
> +	init_completion(&nfc->completion);
Tested-by:Liang Yang <liang.yang@amlogic.com>
Acked-by: Liang Yang <liang.yang@amlogic.com>
>   
>   	nfc->dev = dev;
>   
> 

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http://lists.infradead.org/mailman/listinfo/linux-mtd/

  reply	other threads:[~2019-04-15  6:04 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-11 22:00 [PATCH 0/4] meson-nand: small code improvements Martin Blumenstingl
2019-04-11 22:00 ` [PATCH 1/4] mtd: rawnand: meson: use struct_size macro Martin Blumenstingl
2019-04-15  6:01   ` Liang Yang
2019-04-11 22:00 ` [PATCH 2/4] mtd: rawnand: meson: use of_property_count_elems_of_size helper Martin Blumenstingl
2019-04-15  6:02   ` Liang Yang
2019-04-11 22:00 ` [PATCH 3/4] mtd: rawnand: meson: use a void pointer for meson_nfc_dma_buffer_setup Martin Blumenstingl
2019-04-15  6:03   ` Liang Yang
2019-04-11 22:00 ` [PATCH 4/4] mtd: rawnand: meson: only initialize the RB completion once Martin Blumenstingl
2019-04-15  6:04   ` Liang Yang [this message]
2019-04-18 19:44     ` Martin Blumenstingl
2019-04-19  3:52       ` Liang Yang
2019-04-19  9:00       ` Miquel Raynal
2019-04-18 16:22 ` [PATCH 0/4] meson-nand: small code improvements Miquel Raynal

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