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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Clark Wang <xiaoning.wang@nxp.com>
Cc: conor.culhane@silvaco.com, alexandre.belloni@bootlin.com,
	vitor.soares@synopsys.com, boris.brezillon@bootlin.com,
	linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/4] i3c: master: svc: fix atomic issue
Date: Fri, 16 Jul 2021 00:52:05 +0200	[thread overview]
Message-ID: <20210716005205.5e218d47@xps13> (raw)
In-Reply-To: <20210715082413.3042149-3-xiaoning.wang@nxp.com>

Hi Clark,

Clark Wang <xiaoning.wang@nxp.com> wrote on Thu, 15 Jul 2021 16:24:11
+0800:

> do_daa_locked() function is in a spin lock environment, use
> readl_poll_timeout_atomic() to replace the origin
> readl_poll_timeout().
> 
> Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
> ---
>  drivers/i3c/master/svc-i3c-master.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
> index c25a372f6820..9d80435638ea 100644
> --- a/drivers/i3c/master/svc-i3c-master.c
> +++ b/drivers/i3c/master/svc-i3c-master.c
> @@ -656,7 +656,7 @@ static int svc_i3c_master_readb(struct svc_i3c_master *master, u8 *dst,
>  	u32 reg;
>  
>  	for (i = 0; i < len; i++) {
> -		ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
> +		ret = readl_poll_timeout_atomic(master->regs + SVC_I3C_MSTATUS, reg,
>  					 SVC_I3C_MSTATUS_RXPEND(reg), 0, 1000);

You forgot to align the parameters of the function here and below.

Otherwise,

Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>

>  		if (ret)
>  			return ret;
> @@ -687,7 +687,7 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
>  		 * Either one slave will send its ID, or the assignment process
>  		 * is done.
>  		 */
> -		ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
> +		ret = readl_poll_timeout_atomic(master->regs + SVC_I3C_MSTATUS, reg,
>  					 SVC_I3C_MSTATUS_RXPEND(reg) |
>  					 SVC_I3C_MSTATUS_MCTRLDONE(reg),
>  					 1, 1000);
> @@ -744,7 +744,7 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
>  		}
>  
>  		/* Wait for the slave to be ready to receive its address */
> -		ret = readl_poll_timeout(master->regs + SVC_I3C_MSTATUS, reg,
> +		ret = readl_poll_timeout_atomic(master->regs + SVC_I3C_MSTATUS, reg,
>  					 SVC_I3C_MSTATUS_MCTRLDONE(reg) &&
>  					 SVC_I3C_MSTATUS_STATE_DAA(reg) &&
>  					 SVC_I3C_MSTATUS_BETWEEN(reg),




Thanks,
Miquèl

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  reply	other threads:[~2021-07-15 22:55 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-15  8:24 [PATCH 0/4] i3c: master: svc: some bug fixes Clark Wang
2021-07-15  8:24 ` [PATCH 1/4] i3c: master: svc: move module reset behind clk enable Clark Wang
2021-07-15 22:51   ` Miquel Raynal
2021-07-15  8:24 ` [PATCH 2/4] i3c: master: svc: fix atomic issue Clark Wang
2021-07-15 22:52   ` Miquel Raynal [this message]
2021-07-16  1:58     ` Clark Wang
2021-07-15  8:24 ` [PATCH 3/4] i3c: master: svc: add support for slave to stop returning data Clark Wang
2021-07-15 22:55   ` Miquel Raynal
2021-07-16  1:53     ` Clark Wang
2021-07-15  8:24 ` [PATCH 4/4] i3c: master: svc: set ODSTOP to let I2C device see the STOP signal Clark Wang
2021-07-15 22:57   ` Miquel Raynal
2021-07-16  7:51 ` [PATCH 0/4] i3c: master: svc: some bug fixes Miquel Raynal
2021-07-16  8:07   ` Clark Wang

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