* [PATCH] iio: adc: Variables could be uninitalized if regmap_read() fails
@ 2019-09-30 5:25 ` Yizhuo
0 siblings, 0 replies; 4+ messages in thread
From: Yizhuo @ 2019-09-30 5:25 UTC (permalink / raw)
Cc: csong, zhiyunq, Yizhuo, Jonathan Cameron, Hartmut Knaack,
Lars-Peter Clausen, Peter Meerwald-Stadler, Ray Jui,
Scott Branden, bcm-kernel-feedback-list, Stephen Boyd,
Allison Randal, Thomas Gleixner, linux-iio, linux-arm-kernel,
linux-kernel
Several functions in this file are trying to use regmap_read() to
initialize the specific variable, however, if regmap_read() fails,
the variable could be uninitialized but used directly, which is
potentially unsafe. The return value of regmap_read() should be
checked and handled.
Signed-off-by: Yizhuo <yzhai003@ucr.edu>
---
drivers/iio/adc/bcm_iproc_adc.c | 45 ++++++++++++++++++++++++++++-----
1 file changed, 39 insertions(+), 6 deletions(-)
diff --git a/drivers/iio/adc/bcm_iproc_adc.c b/drivers/iio/adc/bcm_iproc_adc.c
index 646ebdc0a8b4..6df19ceb5ff2 100644
--- a/drivers/iio/adc/bcm_iproc_adc.c
+++ b/drivers/iio/adc/bcm_iproc_adc.c
@@ -137,6 +137,7 @@ static irqreturn_t iproc_adc_interrupt_thread(int irq, void *data)
u32 channel_intr_status;
u32 intr_status;
u32 intr_mask;
+ int ret;
struct iio_dev *indio_dev = data;
struct iproc_adc_priv *adc_priv = iio_priv(indio_dev);
@@ -145,8 +146,19 @@ static irqreturn_t iproc_adc_interrupt_thread(int irq, void *data)
* Make sure this interrupt is intended for us.
* Handle only ADC channel specific interrupts.
*/
- regmap_read(adc_priv->regmap, IPROC_INTERRUPT_STATUS, &intr_status);
- regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &intr_mask);
+ ret = regmap_read(adc_priv->regmap,
+ IPROC_INTERRUPT_STATUS, &intr_status);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_STATUS.\n");
+ return ret;
+ }
+
+ ret = regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &intr_mask);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_MASK.\n");
+ return ret;
+ }
+
intr_status = intr_status & intr_mask;
channel_intr_status = (intr_status & IPROC_ADC_INTR_MASK) >>
IPROC_ADC_INTR;
@@ -162,6 +174,7 @@ static irqreturn_t iproc_adc_interrupt_handler(int irq, void *data)
struct iproc_adc_priv *adc_priv;
struct iio_dev *indio_dev = data;
unsigned int valid_entries;
+ int ret;
u32 intr_status;
u32 intr_channels;
u32 channel_status;
@@ -169,23 +182,37 @@ static irqreturn_t iproc_adc_interrupt_handler(int irq, void *data)
adc_priv = iio_priv(indio_dev);
- regmap_read(adc_priv->regmap, IPROC_INTERRUPT_STATUS, &intr_status);
+ ret = regmap_read(adc_priv->regmap,
+ IPROC_INTERRUPT_STATUS, &intr_status);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_STATUS.\n");
+ return ret;
+ }
+
dev_dbg(&indio_dev->dev, "iproc_adc_interrupt_handler(),INTRPT_STS:%x\n",
intr_status);
intr_channels = (intr_status & IPROC_ADC_INTR_MASK) >> IPROC_ADC_INTR;
if (intr_channels) {
- regmap_read(adc_priv->regmap,
+ ret = regmap_read(adc_priv->regmap,
IPROC_ADC_CHANNEL_INTERRUPT_STATUS +
IPROC_ADC_CHANNEL_OFFSET * adc_priv->chan_id,
&ch_intr_status);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read the register.\n");
+ return ret;
+ }
if (ch_intr_status & IPROC_ADC_CHANNEL_WTRMRK_INTR_MASK) {
- regmap_read(adc_priv->regmap,
+ ret = regmap_read(adc_priv->regmap,
IPROC_ADC_CHANNEL_STATUS +
IPROC_ADC_CHANNEL_OFFSET *
adc_priv->chan_id,
&channel_status);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read the register.\n");
+ return ret;
+ }
valid_entries = ((channel_status &
IPROC_ADC_CHANNEL_VALID_ENTERIES_MASK) >>
@@ -230,6 +257,7 @@ static int iproc_adc_do_read(struct iio_dev *indio_dev,
u32 mask;
u32 val_check;
int failed_cnt = 0;
+ int ret;
struct iproc_adc_priv *adc_priv = iio_priv(indio_dev);
mutex_lock(&adc_priv->mutex);
@@ -284,7 +312,12 @@ static int iproc_adc_do_read(struct iio_dev *indio_dev,
* Testing has shown that this may loop a few time, but we have never
* hit the full count.
*/
- regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &val_check);
+ ret = regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &val_check);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_MASK.\n");
+ return ret;
+ }
+
while (val_check != val) {
failed_cnt++;
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH] iio: adc: Variables could be uninitalized if regmap_read() fails
@ 2019-09-30 5:25 ` Yizhuo
0 siblings, 0 replies; 4+ messages in thread
From: Yizhuo @ 2019-09-30 5:25 UTC (permalink / raw)
Cc: csong, Lars-Peter Clausen, Scott Branden, linux-iio, Ray Jui,
zhiyunq, linux-kernel, Stephen Boyd, Yizhuo,
bcm-kernel-feedback-list, Allison Randal, Peter Meerwald-Stadler,
Hartmut Knaack, Thomas Gleixner, Jonathan Cameron,
linux-arm-kernel
Several functions in this file are trying to use regmap_read() to
initialize the specific variable, however, if regmap_read() fails,
the variable could be uninitialized but used directly, which is
potentially unsafe. The return value of regmap_read() should be
checked and handled.
Signed-off-by: Yizhuo <yzhai003@ucr.edu>
---
drivers/iio/adc/bcm_iproc_adc.c | 45 ++++++++++++++++++++++++++++-----
1 file changed, 39 insertions(+), 6 deletions(-)
diff --git a/drivers/iio/adc/bcm_iproc_adc.c b/drivers/iio/adc/bcm_iproc_adc.c
index 646ebdc0a8b4..6df19ceb5ff2 100644
--- a/drivers/iio/adc/bcm_iproc_adc.c
+++ b/drivers/iio/adc/bcm_iproc_adc.c
@@ -137,6 +137,7 @@ static irqreturn_t iproc_adc_interrupt_thread(int irq, void *data)
u32 channel_intr_status;
u32 intr_status;
u32 intr_mask;
+ int ret;
struct iio_dev *indio_dev = data;
struct iproc_adc_priv *adc_priv = iio_priv(indio_dev);
@@ -145,8 +146,19 @@ static irqreturn_t iproc_adc_interrupt_thread(int irq, void *data)
* Make sure this interrupt is intended for us.
* Handle only ADC channel specific interrupts.
*/
- regmap_read(adc_priv->regmap, IPROC_INTERRUPT_STATUS, &intr_status);
- regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &intr_mask);
+ ret = regmap_read(adc_priv->regmap,
+ IPROC_INTERRUPT_STATUS, &intr_status);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_STATUS.\n");
+ return ret;
+ }
+
+ ret = regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &intr_mask);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_MASK.\n");
+ return ret;
+ }
+
intr_status = intr_status & intr_mask;
channel_intr_status = (intr_status & IPROC_ADC_INTR_MASK) >>
IPROC_ADC_INTR;
@@ -162,6 +174,7 @@ static irqreturn_t iproc_adc_interrupt_handler(int irq, void *data)
struct iproc_adc_priv *adc_priv;
struct iio_dev *indio_dev = data;
unsigned int valid_entries;
+ int ret;
u32 intr_status;
u32 intr_channels;
u32 channel_status;
@@ -169,23 +182,37 @@ static irqreturn_t iproc_adc_interrupt_handler(int irq, void *data)
adc_priv = iio_priv(indio_dev);
- regmap_read(adc_priv->regmap, IPROC_INTERRUPT_STATUS, &intr_status);
+ ret = regmap_read(adc_priv->regmap,
+ IPROC_INTERRUPT_STATUS, &intr_status);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_STATUS.\n");
+ return ret;
+ }
+
dev_dbg(&indio_dev->dev, "iproc_adc_interrupt_handler(),INTRPT_STS:%x\n",
intr_status);
intr_channels = (intr_status & IPROC_ADC_INTR_MASK) >> IPROC_ADC_INTR;
if (intr_channels) {
- regmap_read(adc_priv->regmap,
+ ret = regmap_read(adc_priv->regmap,
IPROC_ADC_CHANNEL_INTERRUPT_STATUS +
IPROC_ADC_CHANNEL_OFFSET * adc_priv->chan_id,
&ch_intr_status);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read the register.\n");
+ return ret;
+ }
if (ch_intr_status & IPROC_ADC_CHANNEL_WTRMRK_INTR_MASK) {
- regmap_read(adc_priv->regmap,
+ ret = regmap_read(adc_priv->regmap,
IPROC_ADC_CHANNEL_STATUS +
IPROC_ADC_CHANNEL_OFFSET *
adc_priv->chan_id,
&channel_status);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read the register.\n");
+ return ret;
+ }
valid_entries = ((channel_status &
IPROC_ADC_CHANNEL_VALID_ENTERIES_MASK) >>
@@ -230,6 +257,7 @@ static int iproc_adc_do_read(struct iio_dev *indio_dev,
u32 mask;
u32 val_check;
int failed_cnt = 0;
+ int ret;
struct iproc_adc_priv *adc_priv = iio_priv(indio_dev);
mutex_lock(&adc_priv->mutex);
@@ -284,7 +312,12 @@ static int iproc_adc_do_read(struct iio_dev *indio_dev,
* Testing has shown that this may loop a few time, but we have never
* hit the full count.
*/
- regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &val_check);
+ ret = regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &val_check);
+ if (ret) {
+ dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_MASK.\n");
+ return ret;
+ }
+
while (val_check != val) {
failed_cnt++;
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] iio: adc: Variables could be uninitalized if regmap_read() fails
2019-09-30 5:25 ` Yizhuo
@ 2019-10-01 9:18 ` Jonathan Cameron
-1 siblings, 0 replies; 4+ messages in thread
From: Jonathan Cameron @ 2019-10-01 9:18 UTC (permalink / raw)
To: Yizhuo
Cc: csong, zhiyunq, Hartmut Knaack, Lars-Peter Clausen,
Peter Meerwald-Stadler, Ray Jui, Scott Branden,
bcm-kernel-feedback-list, Stephen Boyd, Allison Randal,
Thomas Gleixner, linux-iio, linux-arm-kernel, linux-kernel
On Sun, 29 Sep 2019 22:25:39 -0700
Yizhuo <yzhai003@ucr.edu> wrote:
> Several functions in this file are trying to use regmap_read() to
> initialize the specific variable, however, if regmap_read() fails,
> the variable could be uninitialized but used directly, which is
> potentially unsafe. The return value of regmap_read() should be
> checked and handled.
>
> Signed-off-by: Yizhuo <yzhai003@ucr.edu>
I haven't checked if this one has a clock, but there is a bigger issue.
See inline.
Jonathan
> ---
> drivers/iio/adc/bcm_iproc_adc.c | 45 ++++++++++++++++++++++++++++-----
> 1 file changed, 39 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/iio/adc/bcm_iproc_adc.c b/drivers/iio/adc/bcm_iproc_adc.c
> index 646ebdc0a8b4..6df19ceb5ff2 100644
> --- a/drivers/iio/adc/bcm_iproc_adc.c
> +++ b/drivers/iio/adc/bcm_iproc_adc.c
> @@ -137,6 +137,7 @@ static irqreturn_t iproc_adc_interrupt_thread(int irq, void *data)
> u32 channel_intr_status;
> u32 intr_status;
> u32 intr_mask;
> + int ret;
> struct iio_dev *indio_dev = data;
> struct iproc_adc_priv *adc_priv = iio_priv(indio_dev);
>
> @@ -145,8 +146,19 @@ static irqreturn_t iproc_adc_interrupt_thread(int irq, void *data)
> * Make sure this interrupt is intended for us.
> * Handle only ADC channel specific interrupts.
> */
> - regmap_read(adc_priv->regmap, IPROC_INTERRUPT_STATUS, &intr_status);
> - regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &intr_mask);
> + ret = regmap_read(adc_priv->regmap,
> + IPROC_INTERRUPT_STATUS, &intr_status);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_STATUS.\n");
> + return ret;
> + }
> +
> + ret = regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &intr_mask);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_MASK.\n");
> + return ret;
> + }
You need to be extremely careful returning error codes from interrupt routines..
Basically you can't ;)
> +
> intr_status = intr_status & intr_mask;
> channel_intr_status = (intr_status & IPROC_ADC_INTR_MASK) >>
> IPROC_ADC_INTR;
> @@ -162,6 +174,7 @@ static irqreturn_t iproc_adc_interrupt_handler(int irq, void *data)
> struct iproc_adc_priv *adc_priv;
> struct iio_dev *indio_dev = data;
> unsigned int valid_entries;
> + int ret;
> u32 intr_status;
> u32 intr_channels;
> u32 channel_status;
> @@ -169,23 +182,37 @@ static irqreturn_t iproc_adc_interrupt_handler(int irq, void *data)
>
> adc_priv = iio_priv(indio_dev);
>
> - regmap_read(adc_priv->regmap, IPROC_INTERRUPT_STATUS, &intr_status);
> + ret = regmap_read(adc_priv->regmap,
> + IPROC_INTERRUPT_STATUS, &intr_status);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_STATUS.\n");
> + return ret;
> + }
> +
> dev_dbg(&indio_dev->dev, "iproc_adc_interrupt_handler(),INTRPT_STS:%x\n",
> intr_status);
>
> intr_channels = (intr_status & IPROC_ADC_INTR_MASK) >> IPROC_ADC_INTR;
> if (intr_channels) {
> - regmap_read(adc_priv->regmap,
> + ret = regmap_read(adc_priv->regmap,
> IPROC_ADC_CHANNEL_INTERRUPT_STATUS +
> IPROC_ADC_CHANNEL_OFFSET * adc_priv->chan_id,
> &ch_intr_status);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read the register.\n");
> + return ret;
> + }
>
> if (ch_intr_status & IPROC_ADC_CHANNEL_WTRMRK_INTR_MASK) {
> - regmap_read(adc_priv->regmap,
> + ret = regmap_read(adc_priv->regmap,
> IPROC_ADC_CHANNEL_STATUS +
> IPROC_ADC_CHANNEL_OFFSET *
> adc_priv->chan_id,
> &channel_status);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read the register.\n");
> + return ret;
> + }
>
> valid_entries = ((channel_status &
> IPROC_ADC_CHANNEL_VALID_ENTERIES_MASK) >>
> @@ -230,6 +257,7 @@ static int iproc_adc_do_read(struct iio_dev *indio_dev,
> u32 mask;
> u32 val_check;
> int failed_cnt = 0;
> + int ret;
> struct iproc_adc_priv *adc_priv = iio_priv(indio_dev);
>
> mutex_lock(&adc_priv->mutex);
> @@ -284,7 +312,12 @@ static int iproc_adc_do_read(struct iio_dev *indio_dev,
> * Testing has shown that this may loop a few time, but we have never
> * hit the full count.
> */
> - regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &val_check);
> + ret = regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &val_check);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_MASK.\n");
> + return ret;
> + }
> +
> while (val_check != val) {
> failed_cnt++;
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] iio: adc: Variables could be uninitalized if regmap_read() fails
@ 2019-10-01 9:18 ` Jonathan Cameron
0 siblings, 0 replies; 4+ messages in thread
From: Jonathan Cameron @ 2019-10-01 9:18 UTC (permalink / raw)
To: Yizhuo
Cc: csong, Lars-Peter Clausen, Scott Branden, linux-iio, Ray Jui,
zhiyunq, linux-kernel, Stephen Boyd, bcm-kernel-feedback-list,
linux-arm-kernel, Peter Meerwald-Stadler, Hartmut Knaack,
Thomas Gleixner, Allison Randal
On Sun, 29 Sep 2019 22:25:39 -0700
Yizhuo <yzhai003@ucr.edu> wrote:
> Several functions in this file are trying to use regmap_read() to
> initialize the specific variable, however, if regmap_read() fails,
> the variable could be uninitialized but used directly, which is
> potentially unsafe. The return value of regmap_read() should be
> checked and handled.
>
> Signed-off-by: Yizhuo <yzhai003@ucr.edu>
I haven't checked if this one has a clock, but there is a bigger issue.
See inline.
Jonathan
> ---
> drivers/iio/adc/bcm_iproc_adc.c | 45 ++++++++++++++++++++++++++++-----
> 1 file changed, 39 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/iio/adc/bcm_iproc_adc.c b/drivers/iio/adc/bcm_iproc_adc.c
> index 646ebdc0a8b4..6df19ceb5ff2 100644
> --- a/drivers/iio/adc/bcm_iproc_adc.c
> +++ b/drivers/iio/adc/bcm_iproc_adc.c
> @@ -137,6 +137,7 @@ static irqreturn_t iproc_adc_interrupt_thread(int irq, void *data)
> u32 channel_intr_status;
> u32 intr_status;
> u32 intr_mask;
> + int ret;
> struct iio_dev *indio_dev = data;
> struct iproc_adc_priv *adc_priv = iio_priv(indio_dev);
>
> @@ -145,8 +146,19 @@ static irqreturn_t iproc_adc_interrupt_thread(int irq, void *data)
> * Make sure this interrupt is intended for us.
> * Handle only ADC channel specific interrupts.
> */
> - regmap_read(adc_priv->regmap, IPROC_INTERRUPT_STATUS, &intr_status);
> - regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &intr_mask);
> + ret = regmap_read(adc_priv->regmap,
> + IPROC_INTERRUPT_STATUS, &intr_status);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_STATUS.\n");
> + return ret;
> + }
> +
> + ret = regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &intr_mask);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_MASK.\n");
> + return ret;
> + }
You need to be extremely careful returning error codes from interrupt routines..
Basically you can't ;)
> +
> intr_status = intr_status & intr_mask;
> channel_intr_status = (intr_status & IPROC_ADC_INTR_MASK) >>
> IPROC_ADC_INTR;
> @@ -162,6 +174,7 @@ static irqreturn_t iproc_adc_interrupt_handler(int irq, void *data)
> struct iproc_adc_priv *adc_priv;
> struct iio_dev *indio_dev = data;
> unsigned int valid_entries;
> + int ret;
> u32 intr_status;
> u32 intr_channels;
> u32 channel_status;
> @@ -169,23 +182,37 @@ static irqreturn_t iproc_adc_interrupt_handler(int irq, void *data)
>
> adc_priv = iio_priv(indio_dev);
>
> - regmap_read(adc_priv->regmap, IPROC_INTERRUPT_STATUS, &intr_status);
> + ret = regmap_read(adc_priv->regmap,
> + IPROC_INTERRUPT_STATUS, &intr_status);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_STATUS.\n");
> + return ret;
> + }
> +
> dev_dbg(&indio_dev->dev, "iproc_adc_interrupt_handler(),INTRPT_STS:%x\n",
> intr_status);
>
> intr_channels = (intr_status & IPROC_ADC_INTR_MASK) >> IPROC_ADC_INTR;
> if (intr_channels) {
> - regmap_read(adc_priv->regmap,
> + ret = regmap_read(adc_priv->regmap,
> IPROC_ADC_CHANNEL_INTERRUPT_STATUS +
> IPROC_ADC_CHANNEL_OFFSET * adc_priv->chan_id,
> &ch_intr_status);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read the register.\n");
> + return ret;
> + }
>
> if (ch_intr_status & IPROC_ADC_CHANNEL_WTRMRK_INTR_MASK) {
> - regmap_read(adc_priv->regmap,
> + ret = regmap_read(adc_priv->regmap,
> IPROC_ADC_CHANNEL_STATUS +
> IPROC_ADC_CHANNEL_OFFSET *
> adc_priv->chan_id,
> &channel_status);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read the register.\n");
> + return ret;
> + }
>
> valid_entries = ((channel_status &
> IPROC_ADC_CHANNEL_VALID_ENTERIES_MASK) >>
> @@ -230,6 +257,7 @@ static int iproc_adc_do_read(struct iio_dev *indio_dev,
> u32 mask;
> u32 val_check;
> int failed_cnt = 0;
> + int ret;
> struct iproc_adc_priv *adc_priv = iio_priv(indio_dev);
>
> mutex_lock(&adc_priv->mutex);
> @@ -284,7 +312,12 @@ static int iproc_adc_do_read(struct iio_dev *indio_dev,
> * Testing has shown that this may loop a few time, but we have never
> * hit the full count.
> */
> - regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &val_check);
> + ret = regmap_read(adc_priv->regmap, IPROC_INTERRUPT_MASK, &val_check);
> + if (ret) {
> + dev_err(&indio_dev->dev, "Fail to read IPROC_INTERRUPT_MASK.\n");
> + return ret;
> + }
> +
> while (val_check != val) {
> failed_cnt++;
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-10-01 9:18 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-09-30 5:25 [PATCH] iio: adc: Variables could be uninitalized if regmap_read() fails Yizhuo
2019-09-30 5:25 ` Yizhuo
2019-10-01 9:18 ` Jonathan Cameron
2019-10-01 9:18 ` Jonathan Cameron
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