[PATCH v2 1/5] memory: renesas-rpc-if: Return correct value to the caller of rpcif_manual_xfer()

[PATCH v2 1/5] memory: renesas-rpc-if: Return correct value to the caller of rpcif_manual_xfer()

[Lad Prabhakar]

In the error path of rpcif_manual_xfer() the value of ret is overwritten
by value returned by reset_control_reset() function and thus returning
incorrect value to the caller.

This patch makes sure the correct value is returned to the caller of
rpcif_manual_xfer() by dropping the overwrite of ret in error path.
Also now we ignore the value returned by reset_control_reset() in the
error path and instead print a error message when it fails.

Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc: stable@vger.kernel.org
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
---
 drivers/memory/renesas-rpc-if.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c
index f2a33a1af836..69f2e2b4cd50 100644
--- a/drivers/memory/renesas-rpc-if.c
+++ b/drivers/memory/renesas-rpc-if.c
@@ -508,7 +508,8 @@ int rpcif_manual_xfer(struct rpcif *rpc)
 	return ret;
 
 err_out:
-	ret = reset_control_reset(rpc->rstc);
+	if (reset_control_reset(rpc->rstc))
+		dev_err(rpc->dev, "Failed to reset HW\n");
 	rpcif_hw_init(rpc, rpc->bus_size == 2);
 	goto exit;
 }
-- 
2.25.1

[PATCH v2 2/5] memory: renesas-rpc-if: Fix unbalanced pm_runtime_enable in rpcif_{enable,disable}_rpm

[Lad Prabhakar]

rpcif_enable_rpm calls pm_runtime_enable, so rpcif_disable_rpm needs to
call pm_runtime_disable and not pm_runtime_put_sync.

Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
Reported-by: Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc: stable@vger.kernel.org
---
 drivers/memory/renesas-rpc-if.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c
index 69f2e2b4cd50..a8d0ba368625 100644
--- a/drivers/memory/renesas-rpc-if.c
+++ b/drivers/memory/renesas-rpc-if.c
@@ -212,7 +212,7 @@ EXPORT_SYMBOL(rpcif_enable_rpm);
 
 void rpcif_disable_rpm(struct rpcif *rpc)
 {
-	pm_runtime_put_sync(rpc->dev);
+	pm_runtime_disable(rpc->dev);
 }
 EXPORT_SYMBOL(rpcif_disable_rpm);
 
-- 
2.25.1

[PATCH v2 3/5] memory: renesas-rpc-if: Fix a reference leak in rpcif_probe()

[Lad Prabhakar]

Release the node reference by calling of_node_put(flash) in the probe.

Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Cc: stable@vger.kernel.org
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
---
 drivers/memory/renesas-rpc-if.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c
index a8d0ba368625..da0fdb4c7595 100644
--- a/drivers/memory/renesas-rpc-if.c
+++ b/drivers/memory/renesas-rpc-if.c
@@ -561,9 +561,11 @@ static int rpcif_probe(struct platform_device *pdev)
 	} else if (of_device_is_compatible(flash, "cfi-flash")) {
 		name = "rpc-if-hyperflash";
 	} else	{
+		of_node_put(flash);
 		dev_warn(&pdev->dev, "unknown flash type\n");
 		return -ENODEV;
 	}
+	of_node_put(flash);
 
 	vdev = platform_device_alloc(name, pdev->id);
 	if (!vdev)
-- 
2.25.1

Re: [PATCH v2 2/5] memory: renesas-rpc-if: Fix unbalanced pm_runtime_enable in rpcif_{enable,disable}_rpm

[Sergei Shtylyov]

On 11/26/20 10:11 PM, Lad Prabhakar wrote:

> rpcif_enable_rpm calls pm_runtime_enable, so rpcif_disable_rpm needs to
> call pm_runtime_disable and not pm_runtime_put_sync.
> 
> Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
> Reported-by: Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>

   Reported by reported? :-)

> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Cc: stable@vger.kernel.org

Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>

[...]

MBR, Sergei

Re: [PATCH v2 3/5] memory: renesas-rpc-if: Fix a reference leak in rpcif_probe()

[Geert Uytterhoeven]

On Thu, Nov 26, 2020 at 8:12 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
> Release the node reference by calling of_node_put(flash) in the probe.
>
> Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
> Reported-by: Pavel Machek <pavel@denx.de>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Cc: stable@vger.kernel.org
> Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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

Re: [PATCH v2 1/5] memory: renesas-rpc-if: Return correct value to the caller of rpcif_manual_xfer()

[Geert Uytterhoeven]

On Thu, Nov 26, 2020 at 8:12 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
> In the error path of rpcif_manual_xfer() the value of ret is overwritten
> by value returned by reset_control_reset() function and thus returning
> incorrect value to the caller.
>
> This patch makes sure the correct value is returned to the caller of
> rpcif_manual_xfer() by dropping the overwrite of ret in error path.
> Also now we ignore the value returned by reset_control_reset() in the
> error path and instead print a error message when it fails.
>
> Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
> Reported-by: Pavel Machek <pavel@denx.de>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Cc: stable@vger.kernel.org
> Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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

Re: [PATCH v2 1/5] memory: renesas-rpc-if: Return correct value to the caller of rpcif_manual_xfer()

[Pavel Machek]

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On Thu 2020-11-26 19:11:42, Lad Prabhakar wrote:
> In the error path of rpcif_manual_xfer() the value of ret is overwritten
> by value returned by reset_control_reset() function and thus returning
> incorrect value to the caller.
> 
> This patch makes sure the correct value is returned to the caller of
> rpcif_manual_xfer() by dropping the overwrite of ret in error path.
> Also now we ignore the value returned by reset_control_reset() in the
> error path and instead print a error message when it fails.
> 
> Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
> Reported-by: Pavel Machek <pavel@denx.de>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Cc: stable@vger.kernel.org
> Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>

Reviewed-by: Pavel Machek (CIP) <pavel@denx.de>

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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Re: [PATCH v2 3/5] memory: renesas-rpc-if: Fix a reference leak in rpcif_probe()

[Pavel Machek]

[-- Attachment #1: Type: text/plain, Size: 602 bytes --]

On Thu 2020-11-26 19:11:44, Lad Prabhakar wrote:
> Release the node reference by calling of_node_put(flash) in the probe.
> 
> Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
> Reported-by: Pavel Machek <pavel@denx.de>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Cc: stable@vger.kernel.org
> Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>

Reviewed-by: Pavel Machek (CIP)< <pavel@denx.de>


-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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Re: [PATCH v2 1/5] memory: renesas-rpc-if: Return correct value to the caller of rpcif_manual_xfer()

[Krzysztof Kozlowski]

On Thu, Nov 26, 2020 at 07:11:42PM +0000, Lad Prabhakar wrote:
> In the error path of rpcif_manual_xfer() the value of ret is overwritten
> by value returned by reset_control_reset() function and thus returning
> incorrect value to the caller.
> 
> This patch makes sure the correct value is returned to the caller of
> rpcif_manual_xfer() by dropping the overwrite of ret in error path.
> Also now we ignore the value returned by reset_control_reset() in the
> error path and instead print a error message when it fails.
> 
> Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
> Reported-by: Pavel Machek <pavel@denx.de>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Cc: stable@vger.kernel.org
> Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
> ---
>  drivers/memory/renesas-rpc-if.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Thanks, applied to mem-ctrl tree.

Best regards,
Krzysztof

Re: [PATCH v2 2/5] memory: renesas-rpc-if: Fix unbalanced pm_runtime_enable in rpcif_{enable,disable}_rpm

[Krzysztof Kozlowski]

On Thu, Nov 26, 2020 at 07:11:43PM +0000, Lad Prabhakar wrote:
> rpcif_enable_rpm calls pm_runtime_enable, so rpcif_disable_rpm needs to
> call pm_runtime_disable and not pm_runtime_put_sync.
> 
> Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
> Reported-by: Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Cc: stable@vger.kernel.org
> ---
>  drivers/memory/renesas-rpc-if.c | 2 +-

Thanks, applied with corrected Reported-by.

Best regards,
Krzysztof

Re: [PATCH v2 3/5] memory: renesas-rpc-if: Fix a reference leak in rpcif_probe()

[Krzysztof Kozlowski]

On Fri, Nov 27, 2020 at 11:41:14PM +0100, Pavel Machek wrote:
> On Thu 2020-11-26 19:11:44, Lad Prabhakar wrote:
> > Release the node reference by calling of_node_put(flash) in the probe.
> > 
> > Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
> > Reported-by: Pavel Machek <pavel@denx.de>
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > Cc: stable@vger.kernel.org
> > Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
> 
> Reviewed-by: Pavel Machek (CIP)< <pavel@denx.de>

This breaks b4. Corrected and applied.

Best regards,
Krzysztof