* [PATCH] mtd: rawnand: gpmi: fix reference count leak due to pm_runtime_get_sync
@ 2020-06-14 3:43 Aditya Pakki
2020-06-15 7:24 ` Miquel Raynal
0 siblings, 1 reply; 2+ messages in thread
From: Aditya Pakki @ 2020-06-14 3:43 UTC (permalink / raw)
To: pakki001
Cc: kjlu, wu000273, Han Xu, Miquel Raynal, Richard Weinberger,
Vignesh Raghavendra, linux-mtd, linux-kernel
On calling pm_runtime_get_sync() the reference count of the device
is incremented. In case of failure, decrement the
reference count before returning the error.
Signed-off-by: Aditya Pakki <pakki001@umn.edu>
---
drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
index 061a8ddda275..657c0be5c038 100644
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -149,8 +149,10 @@ static int gpmi_init(struct gpmi_nand_data *this)
int ret;
ret = pm_runtime_get_sync(this->dev);
- if (ret < 0)
+ if (ret < 0) {
+ pm_runtime_put_autosuspend(this->dev);
return ret;
+ }
ret = gpmi_reset_block(r->gpmi_regs, false);
if (ret)
@@ -2264,8 +2266,10 @@ static int gpmi_nfc_exec_op(struct nand_chip *chip,
this->transfers[i].direction = DMA_NONE;
ret = pm_runtime_get_sync(this->dev);
- if (ret < 0)
+ if (ret < 0) {
+ pm_runtime_put_autosuspend(this->dev);
return ret;
+ }
/*
* This driver currently supports only one NAND chip. Plus, dies share
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] mtd: rawnand: gpmi: fix reference count leak due to pm_runtime_get_sync
2020-06-14 3:43 [PATCH] mtd: rawnand: gpmi: fix reference count leak due to pm_runtime_get_sync Aditya Pakki
@ 2020-06-15 7:24 ` Miquel Raynal
0 siblings, 0 replies; 2+ messages in thread
From: Miquel Raynal @ 2020-06-15 7:24 UTC (permalink / raw)
To: Aditya Pakki
Cc: kjlu, wu000273, Han Xu, Richard Weinberger, Vignesh Raghavendra,
linux-mtd, linux-kernel
Hi Aditya,
Aditya Pakki <pakki001@umn.edu> wrote on Sat, 13 Jun 2020 22:43:00
-0500:
> On calling pm_runtime_get_sync() the reference count of the device
> is incremented. In case of failure, decrement the
> reference count before returning the error.
>
> Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Missing Fixes/Stable tags here I guess?
> ---
> drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> index 061a8ddda275..657c0be5c038 100644
> --- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
> @@ -149,8 +149,10 @@ static int gpmi_init(struct gpmi_nand_data *this)
> int ret;
>
> ret = pm_runtime_get_sync(this->dev);
> - if (ret < 0)
> + if (ret < 0) {
> + pm_runtime_put_autosuspend(this->dev);
> return ret;
> + }
>
> ret = gpmi_reset_block(r->gpmi_regs, false);
> if (ret)
> @@ -2264,8 +2266,10 @@ static int gpmi_nfc_exec_op(struct nand_chip *chip,
> this->transfers[i].direction = DMA_NONE;
>
> ret = pm_runtime_get_sync(this->dev);
> - if (ret < 0)
> + if (ret < 0) {
> + pm_runtime_put_autosuspend(this->dev);
> return ret;
> + }
>
> /*
> * This driver currently supports only one NAND chip. Plus, dies share
Thanks,
Miquèl
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