[v3,05/10] EDAC/mc: Create new function edac_inc_csrow()
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Message ID 20200123090210.26933-6-rrichter@marvell.com
State New
Headers show
Series
  • EDAC: Rework core and ghes drivers, part two
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Commit Message

Robert Richter Jan. 23, 2020, 9:02 a.m. UTC
Have a separate function to count errors in csrow/channel. This better
separates code and reduces the indentation level. No functional
changes.

Signed-off-by: Robert Richter <rrichter@marvell.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Acked-by: Aristeu Rozanski <aris@redhat.com>
---
 drivers/edac/edac_mc.c | 40 +++++++++++++++++++++++++---------------
 1 file changed, 25 insertions(+), 15 deletions(-)

Comments

Borislav Petkov Feb. 13, 2020, 12:47 p.m. UTC | #1
On Thu, Jan 23, 2020 at 09:02:58AM +0000, Robert Richter wrote:
> Have a separate function to count errors in csrow/channel. This better
> separates code and reduces the indentation level. No functional
> changes.
> 
> Signed-off-by: Robert Richter <rrichter@marvell.com>
> Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
> Acked-by: Aristeu Rozanski <aris@redhat.com>
> ---
>  drivers/edac/edac_mc.c | 40 +++++++++++++++++++++++++---------------
>  1 file changed, 25 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
> index 3c00c046acc9..e75cb7a9c454 100644
> --- a/drivers/edac/edac_mc.c
> +++ b/drivers/edac/edac_mc.c
> @@ -1091,6 +1091,26 @@ static void edac_ue_error(struct mem_ctl_info *mci,
>  	edac_inc_ue_error(mci, enable_per_layer_report, pos, error_count);
>  }
>  
> +static void edac_inc_csrow(struct edac_raw_error_desc *e, int row, int chan)
> +{
> +	struct mem_ctl_info *mci = error_desc_to_mci(e);
> +	u16 count = e->error_count;
> +	enum hw_event_mc_err_type type = e->type;

Please sort function local variables declaration in a reverse christmas
tree order:

	<type A> longest_variable_name;
	<type B> shorter_var_name;
	<type C> even_shorter;
	<type D> i;

> +
> +	if (row < 0)
> +		return;
> +
> +	edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
> +
> +	if (type == HW_EVENT_ERR_CORRECTED) {
> +		mci->csrows[row]->ce_count += count;
> +		if (chan >= 0)
> +			mci->csrows[row]->channels[chan]->ce_count += count;
> +	} else {
> +		mci->csrows[row]->ue_count += count;
> +	}
> +}
> +
>  void edac_raw_mc_handle_error(struct edac_raw_error_desc *e)
>  {
>  	struct mem_ctl_info *mci = error_desc_to_mci(e);
> @@ -1258,22 +1278,12 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
>  			chan = -2;
>  	}
>  
> -	if (!e->enable_per_layer_report) {
> +	if (!e->enable_per_layer_report)
>  		strcpy(e->label, "any memory");
> -	} else {
> -		edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
> -		if (p == e->label)
> -			strcpy(e->label, "unknown memory");
> -		if (type == HW_EVENT_ERR_CORRECTED) {
> -			if (row >= 0) {
> -				mci->csrows[row]->ce_count += error_count;
> -				if (chan >= 0)
> -					mci->csrows[row]->channels[chan]->ce_count += error_count;
> -			}
> -		} else
> -			if (row >= 0)
> -				mci->csrows[row]->ue_count += error_count;
> -	}
> +	else if (!*e->label)
> +		strcpy(e->label, "unknown memory");
> +
> +	edac_inc_csrow(e, row, chan);

Err, but this has functional changes: the !e->enable_per_layer_report
case sets only the e->label and the else branch only does increment
->ce_count.

Your change gets ->ce_count incremented in both cases.

Why?
Robert Richter Feb. 14, 2020, 12:40 p.m. UTC | #2
On 13.02.20 13:47:08, Borislav Petkov wrote:
> On Thu, Jan 23, 2020 at 09:02:58AM +0000, Robert Richter wrote:
> > Have a separate function to count errors in csrow/channel. This better
> > separates code and reduces the indentation level. No functional
> > changes.
> > 
> > Signed-off-by: Robert Richter <rrichter@marvell.com>
> > Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
> > Acked-by: Aristeu Rozanski <aris@redhat.com>
> > ---
> >  drivers/edac/edac_mc.c | 40 +++++++++++++++++++++++++---------------
> >  1 file changed, 25 insertions(+), 15 deletions(-)
> > 
> > diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
> > index 3c00c046acc9..e75cb7a9c454 100644
> > --- a/drivers/edac/edac_mc.c
> > +++ b/drivers/edac/edac_mc.c
> > @@ -1091,6 +1091,26 @@ static void edac_ue_error(struct mem_ctl_info *mci,
> >  	edac_inc_ue_error(mci, enable_per_layer_report, pos, error_count);
> >  }
> >  
> > +static void edac_inc_csrow(struct edac_raw_error_desc *e, int row, int chan)
> > +{
> > +	struct mem_ctl_info *mci = error_desc_to_mci(e);
> > +	u16 count = e->error_count;
> > +	enum hw_event_mc_err_type type = e->type;
> 
> Please sort function local variables declaration in a reverse christmas
> tree order:
> 
> 	<type A> longest_variable_name;
> 	<type B> shorter_var_name;
> 	<type C> even_shorter;
> 	<type D> i;

I can change this. Does variable name length include the assignment?

Generally I prefer to sort it by size_of() to avoid holes due to
padding, though the compiler uses probably registers here anyway.
It's just a flavor.

If it's just this change, could you edit the patch to avoid respin?

> 
> > +
> > +	if (row < 0)
> > +		return;
> > +
> > +	edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
> > +
> > +	if (type == HW_EVENT_ERR_CORRECTED) {
> > +		mci->csrows[row]->ce_count += count;
> > +		if (chan >= 0)
> > +			mci->csrows[row]->channels[chan]->ce_count += count;
> > +	} else {
> > +		mci->csrows[row]->ue_count += count;
> > +	}
> > +}
> > +
> >  void edac_raw_mc_handle_error(struct edac_raw_error_desc *e)
> >  {
> >  	struct mem_ctl_info *mci = error_desc_to_mci(e);
> > @@ -1258,22 +1278,12 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
> >  			chan = -2;
> >  	}
> >  
> > -	if (!e->enable_per_layer_report) {
> > +	if (!e->enable_per_layer_report)
> >  		strcpy(e->label, "any memory");
> > -	} else {
> > -		edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
> > -		if (p == e->label)
> > -			strcpy(e->label, "unknown memory");
> > -		if (type == HW_EVENT_ERR_CORRECTED) {
> > -			if (row >= 0) {
> > -				mci->csrows[row]->ce_count += error_count;
> > -				if (chan >= 0)
> > -					mci->csrows[row]->channels[chan]->ce_count += error_count;
> > -			}
> > -		} else
> > -			if (row >= 0)
> > -				mci->csrows[row]->ue_count += error_count;
> > -	}
> > +	else if (!*e->label)
> > +		strcpy(e->label, "unknown memory");
> > +
> > +	edac_inc_csrow(e, row, chan);
> 
> Err, but this has functional changes: the !e->enable_per_layer_report
> case sets only the e->label and the else branch only does increment
> ->ce_count.
> 
> Your change gets ->ce_count incremented in both cases.

No, there is a check in edac_inc_csrow(): if (row < 0) ... In the case
of "any memory", row is also < 0, so nothing is counted. This is
reasonable since no dimm is found and row/channel is still set to the
setup value of -1.

-Robert

Patch
diff mbox series

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 3c00c046acc9..e75cb7a9c454 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -1091,6 +1091,26 @@  static void edac_ue_error(struct mem_ctl_info *mci,
 	edac_inc_ue_error(mci, enable_per_layer_report, pos, error_count);
 }
 
+static void edac_inc_csrow(struct edac_raw_error_desc *e, int row, int chan)
+{
+	struct mem_ctl_info *mci = error_desc_to_mci(e);
+	u16 count = e->error_count;
+	enum hw_event_mc_err_type type = e->type;
+
+	if (row < 0)
+		return;
+
+	edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
+
+	if (type == HW_EVENT_ERR_CORRECTED) {
+		mci->csrows[row]->ce_count += count;
+		if (chan >= 0)
+			mci->csrows[row]->channels[chan]->ce_count += count;
+	} else {
+		mci->csrows[row]->ue_count += count;
+	}
+}
+
 void edac_raw_mc_handle_error(struct edac_raw_error_desc *e)
 {
 	struct mem_ctl_info *mci = error_desc_to_mci(e);
@@ -1258,22 +1278,12 @@  void edac_mc_handle_error(const enum hw_event_mc_err_type type,
 			chan = -2;
 	}
 
-	if (!e->enable_per_layer_report) {
+	if (!e->enable_per_layer_report)
 		strcpy(e->label, "any memory");
-	} else {
-		edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
-		if (p == e->label)
-			strcpy(e->label, "unknown memory");
-		if (type == HW_EVENT_ERR_CORRECTED) {
-			if (row >= 0) {
-				mci->csrows[row]->ce_count += error_count;
-				if (chan >= 0)
-					mci->csrows[row]->channels[chan]->ce_count += error_count;
-			}
-		} else
-			if (row >= 0)
-				mci->csrows[row]->ue_count += error_count;
-	}
+	else if (!*e->label)
+		strcpy(e->label, "unknown memory");
+
+	edac_inc_csrow(e, row, chan);
 
 	/* Fill the RAM location data */
 	p = e->location;