linux-kernel - Re: [PATCH] soc: qcom: cmd-db: Properly endian swap the slv

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Date:   Fri, 17 Apr 2020 07:05:04 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        kbuild test robot <lkp@...el.com>,
        Lina Iyer <ilina@...eaurora.org>
Subject: Re: [PATCH] soc: qcom: cmd-db: Properly endian swap the slv_id for
 debugfs

On Thu, Apr 16, 2020 at 05:06:45PM -0700, Stephen Boyd wrote:
> Read the slv_id properly by making sure the 16-bit number is endian
> swapped from little endian to CPU native before we read it to figure out
> what to print for the human readable name. Otherwise we may just show
> that all the elements in the cmd-db are "Unknown" which isn't right.
> 
> Reported-by: kbuild test robot <lkp@...el.com>
> Cc: Lina Iyer <ilina@...eaurora.org>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
>  drivers/soc/qcom/cmd-db.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> 
> base-commit: d6815c5c43d4f9d18e557d27fd27ae8d9cfd450c
> prerequisite-patch-id: fc235b174200bb1b24876628a89a841d1c2e4aad
> prerequisite-patch-id: df579afb4eaea4200733d9dffb1d75eef8d8360b
> 
> diff --git a/drivers/soc/qcom/cmd-db.c b/drivers/soc/qcom/cmd-db.c
> index 4f8b739c6485..fc5610603b17 100644
> --- a/drivers/soc/qcom/cmd-db.c
> +++ b/drivers/soc/qcom/cmd-db.c
> @@ -254,7 +254,7 @@ static int cmd_db_debugfs_dump(struct seq_file *seq, void *p)
>  		if (!rsc->slv_id)
>  			break;
>  
> -		switch (rsc->slv_id) {
> +		switch (le16_to_cpu(rsc->slv_id)) {
>  		case CMD_DB_HW_ARC:
>  			name = "ARC";
>  			break;