[PATCH 1/2] mmc: dw-mmc: check the host->bus_hz before calling

[PATCH 1/2] mmc: dw-mmc: check the host->bus_hz before calling

[Jaehoon Chung]

Check whether host->bus_hz is zero or not. before calling drv_data->setup_clock.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/mmc/host/dw_mmc.c |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 60063cc..c59078c 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -2203,6 +2203,13 @@ int dw_mci_probe(struct dw_mci *host)
 	else
 		host->bus_hz = clk_get_rate(host->ciu_clk);
 
+	if (!host->bus_hz) {
+		dev_err(host->dev,
+			"Platform data must supply bus speed\n");
+		ret = -ENODEV;
+		goto err_clk_ciu;
+	}
+
 	if (drv_data && drv_data->setup_clock) {
 		ret = drv_data->setup_clock(host);
 		if (ret) {
@@ -2212,13 +2219,6 @@ int dw_mci_probe(struct dw_mci *host)
 		}
 	}
 
-	if (!host->bus_hz) {
-		dev_err(host->dev,
-			"Platform data must supply bus speed\n");
-		ret = -ENODEV;
-		goto err_clk_ciu;
-	}
-
 	host->quirks = host->pdata->quirks;
 
 	spin_lock_init(&host->lock);
-- 
1.7.9.5

RE: [PATCH 1/2] mmc: dw-mmc: check the host->bus_hz before calling

[Seungwon Jeon]

On Monday, February 18, 2013, Jaehoon Chung wrote:
> Check whether host->bus_hz is zero or not. before calling drv_data->setup_clock.
> 
> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> ---
>  drivers/mmc/host/dw_mmc.c |   14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index 60063cc..c59078c 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -2203,6 +2203,13 @@ int dw_mci_probe(struct dw_mci *host)
>  	else
>  		host->bus_hz = clk_get_rate(host->ciu_clk);
> 
> +	if (!host->bus_hz) {
> +		dev_err(host->dev,
> +			"Platform data must supply bus speed\n");
> +		ret = -ENODEV;
> +		goto err_clk_ciu;
> +	}
> +
>  	if (drv_data && drv_data->setup_clock) {
>  		ret = drv_data->setup_clock(host);
>  		if (ret) {
> @@ -2212,13 +2219,6 @@ int dw_mci_probe(struct dw_mci *host)
>  		}
>  	}
> 
> -	if (!host->bus_hz) {
> -		dev_err(host->dev,
> -			"Platform data must supply bus speed\n");
> -		ret = -ENODEV;
> -		goto err_clk_ciu;
> -	}
> -
Currently checking 'host->bus_hz' is following 'setup_clock'
If specific implementation for 'setup_clock' is present, bus_hz may be updated.
When considering multiple platforms,  it looks like proper.
Could you check the patch for more?
[PATCH v5 9/9] mmc: dw_mmc: add support for exynos specific implementation of dw-mshc

Thanks,
Seungwon Jeon

>  	host->quirks = host->pdata->quirks;
> 
>  	spin_lock_init(&host->lock);
> --
> 1.7.9.5
> --
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