2022-06-22 17:40:40

by Prabhakar Mahadev Lad

Subject: [PATCH v2 1/2] mmc: renesas_sdhi: Get the reset handle early in the probe

In case of devm_reset_control_get_optional_exclusive() failure we returned
directly instead of jumping to the error path to roll back initialization.

This patch moves devm_reset_control_get_optional_exclusive() early in the
probe so that we have the reset handle prior to initialization of the
hardware.

Fixes: b4d86f37eacb7 ("mmc: renesas_sdhi: do hard reset if possible")
Reported-by: Pavel Machek <[email protected]>
Signed-off-by: Lad Prabhakar <[email protected]>
---
drivers/mmc/host/renesas_sdhi_core.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 4404ca1f98d8..0d258b6e1a43 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -938,6 +938,10 @@ int renesas_sdhi_probe(struct platform_device *pdev,
if (IS_ERR(priv->clk_cd))
return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk_cd), "cannot get cd clock");

+ priv->rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
+ if (IS_ERR(priv->rstc))
+ return PTR_ERR(priv->rstc);
+
priv->pinctrl = devm_pinctrl_get(&pdev->dev);
if (!IS_ERR(priv->pinctrl)) {
priv->pins_default = pinctrl_lookup_state(priv->pinctrl,
@@ -1030,10 +1034,6 @@ int renesas_sdhi_probe(struct platform_device *pdev,
if (ret)
goto efree;

- priv->rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
- if (IS_ERR(priv->rstc))
- return PTR_ERR(priv->rstc);
-
ver = sd_ctrl_read16(host, CTL_VERSION);
/* GEN2_SDR104 is first known SDHI to use 32bit block count */
if (ver < SDHI_VER_GEN2_SDR104 && mmc_data->max_blk_count > U16_MAX)
--
2.17.1

2022-06-22 18:35:19

by Geert Uytterhoeven

Subject: Re: [PATCH v2 1/2] mmc: renesas_sdhi: Get the reset handle early in the probe

On Wed, Jun 22, 2022 at 7:36 PM Lad Prabhakar
<[email protected]> wrote:
> In case of devm_reset_control_get_optional_exclusive() failure we returned
> directly instead of jumping to the error path to roll back initialization.
>
> This patch moves devm_reset_control_get_optional_exclusive() early in the
> probe so that we have the reset handle prior to initialization of the
> hardware.
>
> Fixes: b4d86f37eacb7 ("mmc: renesas_sdhi: do hard reset if possible")
> Reported-by: Pavel Machek <[email protected]>
> Signed-off-by: Lad Prabhakar <[email protected]>

Reviewed-by: Geert Uytterhoeven <[email protected]>

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds