linux-kernel - Re: [PATCH v4 06/20] drivers: crypto: meson: drop status field from meson

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Date: Mon, 12 Feb 2024 18:12:02 +0100
From: neil.armstrong@...aro.org
To: Alexey Romanov <avromanov@...utedevices.com>, clabbe@...libre.com,
 herbert@...dor.apana.org.au, davem@...emloft.net, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 khilman@...libre.com, jbrunet@...libre.com,
 martin.blumenstingl@...glemail.com, vadim.fedorenko@...ux.dev
Cc: linux-crypto@...r.kernel.org, linux-amlogic@...ts.infradead.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, kernel@...utedevices.com
Subject: Re: [PATCH v4 06/20] drivers: crypto: meson: drop status field from
 meson_flow

On 12/02/2024 14:50, Alexey Romanov wrote:
> This field is used only to check for timeout. But there is more
> convenient way to achive the same goal.
> 
> Signed-off-by: Alexey Romanov <avromanov@...utedevices.com>
> ---
>   drivers/crypto/amlogic/amlogic-gxl-cipher.c | 13 +++++++++----
>   drivers/crypto/amlogic/amlogic-gxl-core.c   |  1 -
>   drivers/crypto/amlogic/amlogic-gxl.h        |  2 --
>   3 files changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/crypto/amlogic/amlogic-gxl-cipher.c b/drivers/crypto/amlogic/amlogic-gxl-cipher.c
> index 18e9e2d39b1f..dc0b100c5de2 100644
> --- a/drivers/crypto/amlogic/amlogic-gxl-cipher.c
> +++ b/drivers/crypto/amlogic/amlogic-gxl-cipher.c
> @@ -219,13 +219,18 @@ static int meson_cipher(struct skcipher_request *areq)
>   	}
>   
>   	reinit_completion(&mc->chanlist[flow].complete);
> -	mc->chanlist[flow].status = 0;
>   	meson_dma_start(mc, flow);
> -	wait_for_completion_interruptible_timeout(&mc->chanlist[flow].complete,
> -						  msecs_to_jiffies(500));
> -	if (mc->chanlist[flow].status == 0) {
> +
> +	err = wait_for_completion_interruptible_timeout(&mc->chanlist[flow].complete,
> +							msecs_to_jiffies(500));
> +	if (err == 0) {
>   		dev_err(mc->dev, "DMA timeout for flow %d\n", flow);
>   		err = -EINVAL;
> +	} else if (err < 0) {
> +		dev_err(mc->dev, "Waiting for DMA completion is failed (%d)\n", err);
> +	} else {
> +		/* No error */
> +		err = 0;
>   	}
>   
>   	dma_unmap_single(mc->dev, phykeyiv, keyivlen, DMA_TO_DEVICE);
> diff --git a/drivers/crypto/amlogic/amlogic-gxl-core.c b/drivers/crypto/amlogic/amlogic-gxl-core.c
> index 51291fdcf8b6..f7c60ebffbc3 100644
> --- a/drivers/crypto/amlogic/amlogic-gxl-core.c
> +++ b/drivers/crypto/amlogic/amlogic-gxl-core.c
> @@ -54,7 +54,6 @@ static irqreturn_t meson_irq_handler(int irq, void *data)
>   	for (flow = 0; flow < mc->flow_cnt; flow++) {
>   		if (mc->chanlist[flow].irq == irq) {
>   			if (meson_dma_ready(mc, flow)) {
> -				mc->chanlist[flow].status = 1;
>   				complete(&mc->chanlist[flow].complete);
>   				return IRQ_HANDLED;
>   			}
> diff --git a/drivers/crypto/amlogic/amlogic-gxl.h b/drivers/crypto/amlogic/amlogic-gxl.h
> index 5f5e3115fcdf..e27908992ae3 100644
> --- a/drivers/crypto/amlogic/amlogic-gxl.h
> +++ b/drivers/crypto/amlogic/amlogic-gxl.h
> @@ -59,7 +59,6 @@ struct meson_desc {
>    * @engine:	ptr to the crypto_engine for this flow
>    * @keylen:	keylen for this flow operation
>    * @complete:	completion for the current task on this flow
> - * @status:	set to 1 by interrupt if task is done
>    * @irq:	IRQ number for amlogic-crypto
>    * @t_phy:	Physical address of task
>    * @tl:		pointer to the current ce_task for this flow
> @@ -68,7 +67,6 @@ struct meson_desc {
>   struct meson_flow {
>   	struct crypto_engine *engine;
>   	struct completion complete;
> -	int status;
>   	int irq;
>   	unsigned int keylen;
>   	dma_addr_t t_phy;

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>