[STYLE v1 0/3] Fixing check patch styling issues

[STYLE v1 0/3] Fixing check patch styling issues

[Raghu H]

The following patches are cleanup or fixing the styling issues found
using checkpatch

In cxl/core/mbox.c, in case of null check failure, returning errno or
-ENOMEM in this case is good enough, removing the redundant dev_err
message.

In cxl/core/port.c, there is line of spaces in the definition which
violates checkpatch coding sytle, restructured the definition to use
tabs

In cxl/core/region.c, the else is not required after the return
statement, cleaned it up.

Verified the build and sanity by booting the guest VM using the freshly
built components.

Raghu H (3):
  cxl/mbox: remove redundant debug msg
  cxl/core/port: Use tabs to fix styling errors
  cxl/core/region:Remove else after return statement

 drivers/cxl/core/mbox.c   |  4 +---
 drivers/cxl/core/port.c   | 18 +++++++++---------
 drivers/cxl/core/region.c |  7 +++----
 3 files changed, 13 insertions(+), 16 deletions(-)

-- 
2.39.2

[STYLE v1 1/3] cxl/mbox: remove redundant debug msg

[Raghu H]

A return of errno should be good enough if the memory allocation fails,
the debug message here is redundatant as per the coding style, removing it.

Signed-off-by: Raghu H <raghuhack78@gmail.com>
---
 drivers/cxl/core/mbox.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index f2addb457172..11ea145b4b1f 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -1112,10 +1112,8 @@ struct cxl_dev_state *cxl_dev_state_create(struct device *dev)
 	struct cxl_dev_state *cxlds;
 
 	cxlds = devm_kzalloc(dev, sizeof(*cxlds), GFP_KERNEL);
-	if (!cxlds) {
-		dev_err(dev, "No memory available\n");
+	if (!cxlds)
 		return ERR_PTR(-ENOMEM);
-	}
 
 	mutex_init(&cxlds->mbox_mutex);
 	mutex_init(&cxlds->event.log_lock);
-- 
2.39.2

[STYLE v1 2/3] cxl/core/port: Use tabs to fix styling errors

[Raghu H]

Styling errors due to linux of unwanted spaces in the definition,
modified the definition to use tab to fix the styling issue.

Signed-off-by: Raghu H <raghuhack78@gmail.com>
---
 drivers/cxl/core/port.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c
index 8ee6b6e2e2a4..7c3aaed180ca 100644
--- a/drivers/cxl/core/port.c
+++ b/drivers/cxl/core/port.c
@@ -95,15 +95,15 @@ static ssize_t size_show(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR_RO(size);
 
-#define CXL_DECODER_FLAG_ATTR(name, flag)                            \
-static ssize_t name##_show(struct device *dev,                       \
-			   struct device_attribute *attr, char *buf) \
-{                                                                    \
-	struct cxl_decoder *cxld = to_cxl_decoder(dev);              \
-                                                                     \
-	return sysfs_emit(buf, "%s\n",                               \
-			  (cxld->flags & (flag)) ? "1" : "0");       \
-}                                                                    \
+#define CXL_DECODER_FLAG_ATTR(name, flag)				\
+static ssize_t name##_show(struct device *dev,				\
+			   struct device_attribute *attr, char *buf)	\
+{									\
+	struct cxl_decoder *cxld = to_cxl_decoder(dev);			\
+									\
+	return sysfs_emit(buf, "%s\n",					\
+			  (cxld->flags & (flag)) ? "1" : "0");		\
+}									\
 static DEVICE_ATTR_RO(name)
 
 CXL_DECODER_FLAG_ATTR(cap_pmem, CXL_DECODER_F_PMEM);
-- 
2.39.2

[STYLE v1 3/3] cxl/core/region:Remove else after return statement

[Raghu H]

The else section here is redundant after return statement, removing it.
Sanity and correctness is not affected due to this fix.

Signed-off-by: Raghu H <raghuhack78@gmail.com>
---
 drivers/cxl/core/region.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index f29028148806..1d695107b4a7 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -2666,11 +2666,10 @@ static int cxl_region_invalidate_memregion(struct cxl_region *cxlr)
 				"Bypassing cpu_cache_invalidate_memregion() for testing!\n");
 			clear_bit(CXL_REGION_F_INCOHERENT, &cxlr->flags);
 			return 0;
-		} else {
-			dev_err(&cxlr->dev,
-				"Failed to synchronize CPU cache state\n");
-			return -ENXIO;
 		}
+		dev_err(&cxlr->dev,
+			"Failed to synchronize CPU cache state\n");
+		return -ENXIO;
 	}
 
 	cpu_cache_invalidate_memregion(IORES_DESC_CXL);
-- 
2.39.2

Re: [STYLE v1 1/3] cxl/mbox: remove redundant debug msg

[Ira Weiny]

Raghu H wrote:
> A return of errno should be good enough if the memory allocation fails,
> the debug message here is redundatant as per the coding style, removing it.
> 
> Signed-off-by: Raghu H <raghuhack78@gmail.com>

I'm not seeing a lot of value in this error message either.  There are
plenty of other places probe can fail without any errors at all.

I guess:

Reviewed-by: Ira Weiny <ira.weiny@intel.com>

Re: [STYLE v1 2/3] cxl/core/port: Use tabs to fix styling errors

[Ira Weiny]

Raghu H wrote:
> Styling errors due to linux of unwanted spaces in the definition,
> modified the definition to use tab to fix the styling issue.
> 
> Signed-off-by: Raghu H <raghuhack78@gmail.com>

NAK

This is unnecessary churn.  The formatting of the file is fine and very
readable.

Ira

> ---
>  drivers/cxl/core/port.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c
> index 8ee6b6e2e2a4..7c3aaed180ca 100644
> --- a/drivers/cxl/core/port.c
> +++ b/drivers/cxl/core/port.c
> @@ -95,15 +95,15 @@ static ssize_t size_show(struct device *dev, struct device_attribute *attr,
>  }
>  static DEVICE_ATTR_RO(size);
>  
> -#define CXL_DECODER_FLAG_ATTR(name, flag)                            \
> -static ssize_t name##_show(struct device *dev,                       \
> -			   struct device_attribute *attr, char *buf) \
> -{                                                                    \
> -	struct cxl_decoder *cxld = to_cxl_decoder(dev);              \
> -                                                                     \
> -	return sysfs_emit(buf, "%s\n",                               \
> -			  (cxld->flags & (flag)) ? "1" : "0");       \
> -}                                                                    \
> +#define CXL_DECODER_FLAG_ATTR(name, flag)				\
> +static ssize_t name##_show(struct device *dev,				\
> +			   struct device_attribute *attr, char *buf)	\
> +{									\
> +	struct cxl_decoder *cxld = to_cxl_decoder(dev);			\
> +									\
> +	return sysfs_emit(buf, "%s\n",					\
> +			  (cxld->flags & (flag)) ? "1" : "0");		\
> +}									\
>  static DEVICE_ATTR_RO(name)
>  
>  CXL_DECODER_FLAG_ATTR(cap_pmem, CXL_DECODER_F_PMEM);
> -- 
> 2.39.2
> 

Re: [STYLE v1 3/3] cxl/core/region:Remove else after return statement

[Ira Weiny]

Raghu H wrote:
> The else section here is redundant after return statement, removing it.
> Sanity and correctness is not affected due to this fix.
> 
> Signed-off-by: Raghu H <raghuhack78@gmail.com>

Ok, per my eyes I would have liked an extra space before the dev_err()
but...

Reviewed-by: Ira Weiny <ira.weiny@intel.com>

> ---
>  drivers/cxl/core/region.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
> index f29028148806..1d695107b4a7 100644
> --- a/drivers/cxl/core/region.c
> +++ b/drivers/cxl/core/region.c
> @@ -2666,11 +2666,10 @@ static int cxl_region_invalidate_memregion(struct cxl_region *cxlr)
>  				"Bypassing cpu_cache_invalidate_memregion() for testing!\n");
>  			clear_bit(CXL_REGION_F_INCOHERENT, &cxlr->flags);
>  			return 0;
> -		} else {
> -			dev_err(&cxlr->dev,
> -				"Failed to synchronize CPU cache state\n");
> -			return -ENXIO;
>  		}
> +		dev_err(&cxlr->dev,
> +			"Failed to synchronize CPU cache state\n");
> +		return -ENXIO;
>  	}
>  
>  	cpu_cache_invalidate_memregion(IORES_DESC_CXL);
> -- 
> 2.39.2
> 

Re: [STYLE v1 1/3] cxl/mbox: remove redundant debug msg

[Alison Schofield]

On Wed, Apr 19, 2023 at 11:14:41AM +0000, Raghu H wrote:
> A return of errno should be good enough if the memory allocation fails,
> the debug message here is redundatant as per the coding style, removing it.

Hi Raghu,

Thanks for the patch. The code change looks fine.

Here is some feedback on the commit msg and log:

This removes a dev_err() not a debug message, dev_dbg()

Commit msg can be clearer like:
cxl/mbox: Remove redundant dev_err() after failed mem alloc

Please include PATCH in the subject line.
See Documentation/process/submitting-patches.rst or peruse other
patches on the mailing list and subsystem to see examples.

Alison


> 
> Signed-off-by: Raghu H <raghuhack78@gmail.com>
> ---
>  drivers/cxl/core/mbox.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
> index f2addb457172..11ea145b4b1f 100644
> --- a/drivers/cxl/core/mbox.c
> +++ b/drivers/cxl/core/mbox.c
> @@ -1112,10 +1112,8 @@ struct cxl_dev_state *cxl_dev_state_create(struct device *dev)
>  	struct cxl_dev_state *cxlds;
>  
>  	cxlds = devm_kzalloc(dev, sizeof(*cxlds), GFP_KERNEL);
> -	if (!cxlds) {
> -		dev_err(dev, "No memory available\n");
> +	if (!cxlds)
>  		return ERR_PTR(-ENOMEM);
> -	}
>  
>  	mutex_init(&cxlds->mbox_mutex);
>  	mutex_init(&cxlds->event.log_lock);
> -- 
> 2.39.2
> 

Re: [STYLE v1 0/3] Fixing check patch styling issues

[Alison Schofield]

On Wed, Apr 19, 2023 at 11:14:40AM +0000, Raghu H wrote:

Hi Raghu,

Thanks for the cleanup patches.
Sometime maintainers don't want cleanup, but these look good, and
hopefully they can get queued, after you send a v2.

I see Ira already commented to drop the tab reformatting, so drop
that in a v2 of this set.

I notice only 'me' in the 'To;' list here. The cover letter needs
to get the same maintainer list as your patches.

Each patches commit log (now 2 patches) should say 'Issue found with
checkpatch', or something similar. We like to know what tool to credit,
and like that to be in the git history/changelog, not just the cover
letter.

> The following patches are cleanup or fixing the styling issues found
> using checkpatch
> 
> In cxl/core/mbox.c, in case of null check failure, returning errno or
> -ENOMEM in this case is good enough, removing the redundant dev_err
> message.
> 
> In cxl/core/port.c, there is line of spaces in the definition which
> violates checkpatch coding sytle, restructured the definition to use
> tabs
> 
> In cxl/core/region.c, the else is not required after the return
> statement, cleaned it up.
> 
> Verified the build and sanity by booting the guest VM using the freshly
> built components.
> 
> Raghu H (3):
>   cxl/mbox: remove redundant debug msg
>   cxl/core/port: Use tabs to fix styling errors
>   cxl/core/region:Remove else after return statement

Assumes you are dropping the port changes.

Do this:

$git log --oneline mbox.c
$git log --oneline region.c

Your commit messages 'look' different than the existing message.
Please fix their formatting, in addition to the reword I mention
in patch 1 reply.

Thanks,
Alison

> 
>  drivers/cxl/core/mbox.c   |  4 +---
>  drivers/cxl/core/port.c   | 18 +++++++++---------
>  drivers/cxl/core/region.c |  7 +++----
>  3 files changed, 13 insertions(+), 16 deletions(-)
> 
> -- 
> 2.39.2
> 

Re: [STYLE v1 3/3] cxl/core/region:Remove else after return statement

[Alison Schofield]

On Thu, Apr 27, 2023 at 12:13:14PM -0700, Ira Weiny wrote:
> Raghu H wrote:
> > The else section here is redundant after return statement, removing it.
> > Sanity and correctness is not affected due to this fix.
> > 
> > Signed-off-by: Raghu H <raghuhack78@gmail.com>
> 
> Ok, per my eyes I would have liked an extra space before the dev_err()
> but...

Well, I asked Rahgu to give us a v2 with mostly patch formatting fixups,
so let's get that extra space too :)

> 
> Reviewed-by: Ira Weiny <ira.weiny@intel.com>
> 
> > ---
> >  drivers/cxl/core/region.c | 7 +++----
> >  1 file changed, 3 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
> > index f29028148806..1d695107b4a7 100644
> > --- a/drivers/cxl/core/region.c
> > +++ b/drivers/cxl/core/region.c
> > @@ -2666,11 +2666,10 @@ static int cxl_region_invalidate_memregion(struct cxl_region *cxlr)
> >  				"Bypassing cpu_cache_invalidate_memregion() for testing!\n");
> >  			clear_bit(CXL_REGION_F_INCOHERENT, &cxlr->flags);
> >  			return 0;
> > -		} else {
> > -			dev_err(&cxlr->dev,
> > -				"Failed to synchronize CPU cache state\n");
> > -			return -ENXIO;
> >  		}
> > +		dev_err(&cxlr->dev,
> > +			"Failed to synchronize CPU cache state\n");
> > +		return -ENXIO;
> >  	}
> >  
> >  	cpu_cache_invalidate_memregion(IORES_DESC_CXL);
> > -- 
> > 2.39.2
> > 

Re: [STYLE v1 3/3] cxl/core/region:Remove else after return statement

[RAGHU H]

Thanks Alison & Ira for comments

I missed your messages due to personal reasons.

Will clean and follow it up with v2 very soon.

On Fri, Apr 28, 2023 at 1:19 AM Alison Schofield
<alison.schofield@intel.com> wrote:
>
> On Thu, Apr 27, 2023 at 12:13:14PM -0700, Ira Weiny wrote:
> > Raghu H wrote:
> > > The else section here is redundant after return statement, removing it.
> > > Sanity and correctness is not affected due to this fix.
> > >
> > > Signed-off-by: Raghu H <raghuhack78@gmail.com>
> >
> > Ok, per my eyes I would have liked an extra space before the dev_err()
> > but...
>
> Well, I asked Rahgu to give us a v2 with mostly patch formatting fixups,
> so let's get that extra space too :)
>
> >
> > Reviewed-by: Ira Weiny <ira.weiny@intel.com>
> >
> > > ---
> > >  drivers/cxl/core/region.c | 7 +++----
> > >  1 file changed, 3 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
> > > index f29028148806..1d695107b4a7 100644
> > > --- a/drivers/cxl/core/region.c
> > > +++ b/drivers/cxl/core/region.c
> > > @@ -2666,11 +2666,10 @@ static int cxl_region_invalidate_memregion(struct cxl_region *cxlr)
> > >                             "Bypassing cpu_cache_invalidate_memregion() for testing!\n");
> > >                     clear_bit(CXL_REGION_F_INCOHERENT, &cxlr->flags);
> > >                     return 0;
> > > -           } else {
> > > -                   dev_err(&cxlr->dev,
> > > -                           "Failed to synchronize CPU cache state\n");
> > > -                   return -ENXIO;
> > >             }
> > > +           dev_err(&cxlr->dev,
> > > +                   "Failed to synchronize CPU cache state\n");
> > > +           return -ENXIO;
> > >     }
> > >
> > >     cpu_cache_invalidate_memregion(IORES_DESC_CXL);
> > > --
> > > 2.39.2
> > >