[01/11] EDAC/mc: Use int type for parameters of edac_mc_alloc()
diff mbox series

Message ID 20200306151318.17422-2-rrichter@marvell.com
State New
Headers show
Series
  • EDAC/ghes: Cleanup, rework and improvement of memory reporting
Related show

Commit Message

Robert Richter March 6, 2020, 3:13 p.m. UTC
Most iterators use int type as index. mci->mc_idx is also type int. So
use int type for parameters of edac_mc_alloc(). Extend the range check
to check for negative values. There is a type cast now when assigning
variable n_layers to mci->n_layer, it is safe due to the range check.

While at it, rename the users of edac_mc_alloc() to mc_idx as this
fits better here.

Signed-off-by: Robert Richter <rrichter@marvell.com>
---
 drivers/edac/edac_mc.c | 7 +++----
 drivers/edac/edac_mc.h | 6 +++---
 2 files changed, 6 insertions(+), 7 deletions(-)

Comments

Matthias Brugger April 6, 2020, 11:38 a.m. UTC | #1
On 06/03/2020 16:13, Robert Richter wrote:
> Most iterators use int type as index. mci->mc_idx is also type int. So
> use int type for parameters of edac_mc_alloc(). Extend the range check
> to check for negative values. There is a type cast now when assigning
> variable n_layers to mci->n_layer, it is safe due to the range check.
> 
> While at it, rename the users of edac_mc_alloc() to mc_idx as this
> fits better here.
> 
> Signed-off-by: Robert Richter <rrichter@marvell.com>

Reviewed-by: Matthias Brugger <mbrugger@suse.com>

> ---
>  drivers/edac/edac_mc.c | 7 +++----
>  drivers/edac/edac_mc.h | 6 +++---
>  2 files changed, 6 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
> index 75ede27bdf6a..8bd3d00b4385 100644
> --- a/drivers/edac/edac_mc.c
> +++ b/drivers/edac/edac_mc.c
> @@ -444,8 +444,7 @@ static int edac_mc_alloc_dimms(struct mem_ctl_info *mci)
>  	return 0;
>  }
>  
> -struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
> -				   unsigned int n_layers,
> +struct mem_ctl_info *edac_mc_alloc(int mc_idx, int n_layers,
>  				   struct edac_mc_layer *layers,
>  				   unsigned int sz_pvt)
>  {
> @@ -456,7 +455,7 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
>  	void *pvt, *ptr = NULL;
>  	bool per_rank = false;
>  
> -	if (WARN_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0))
> +	if (WARN_ON(mc_idx < 0 || n_layers < 1 || n_layers > EDAC_MAX_LAYERS))
>  		return NULL;
>  
>  	/*
> @@ -505,7 +504,7 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
>  	pvt = sz_pvt ? (((char *)mci) + ((unsigned long)pvt)) : NULL;
>  
>  	/* setup index and various internal pointers */
> -	mci->mc_idx = mc_num;
> +	mci->mc_idx = mc_idx;
>  	mci->tot_dimms = tot_dimms;
>  	mci->pvt_info = pvt;
>  	mci->n_layers = n_layers;
> diff --git a/drivers/edac/edac_mc.h b/drivers/edac/edac_mc.h
> index 881b00eadf7a..4815f50afea0 100644
> --- a/drivers/edac/edac_mc.h
> +++ b/drivers/edac/edac_mc.h
> @@ -98,7 +98,7 @@ do {									\
>  /**
>   * edac_mc_alloc() - Allocate and partially fill a struct &mem_ctl_info.
>   *
> - * @mc_num:		Memory controller number
> + * @mc_idx:		Memory controller number
>   * @n_layers:		Number of MC hierarchy layers
>   * @layers:		Describes each layer as seen by the Memory Controller
>   * @sz_pvt:		size of private storage needed
> @@ -122,8 +122,8 @@ do {									\
>   *	On success, return a pointer to struct mem_ctl_info pointer;
>   *	%NULL otherwise
>   */
> -struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
> -				   unsigned int n_layers,
> +struct mem_ctl_info *edac_mc_alloc(int mc_idx,
> +				   int n_layers,
>  				   struct edac_mc_layer *layers,
>  				   unsigned int sz_pvt);
>  
>

Patch
diff mbox series

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 75ede27bdf6a..8bd3d00b4385 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -444,8 +444,7 @@  static int edac_mc_alloc_dimms(struct mem_ctl_info *mci)
 	return 0;
 }
 
-struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
-				   unsigned int n_layers,
+struct mem_ctl_info *edac_mc_alloc(int mc_idx, int n_layers,
 				   struct edac_mc_layer *layers,
 				   unsigned int sz_pvt)
 {
@@ -456,7 +455,7 @@  struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
 	void *pvt, *ptr = NULL;
 	bool per_rank = false;
 
-	if (WARN_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0))
+	if (WARN_ON(mc_idx < 0 || n_layers < 1 || n_layers > EDAC_MAX_LAYERS))
 		return NULL;
 
 	/*
@@ -505,7 +504,7 @@  struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
 	pvt = sz_pvt ? (((char *)mci) + ((unsigned long)pvt)) : NULL;
 
 	/* setup index and various internal pointers */
-	mci->mc_idx = mc_num;
+	mci->mc_idx = mc_idx;
 	mci->tot_dimms = tot_dimms;
 	mci->pvt_info = pvt;
 	mci->n_layers = n_layers;
diff --git a/drivers/edac/edac_mc.h b/drivers/edac/edac_mc.h
index 881b00eadf7a..4815f50afea0 100644
--- a/drivers/edac/edac_mc.h
+++ b/drivers/edac/edac_mc.h
@@ -98,7 +98,7 @@  do {									\
 /**
  * edac_mc_alloc() - Allocate and partially fill a struct &mem_ctl_info.
  *
- * @mc_num:		Memory controller number
+ * @mc_idx:		Memory controller number
  * @n_layers:		Number of MC hierarchy layers
  * @layers:		Describes each layer as seen by the Memory Controller
  * @sz_pvt:		size of private storage needed
@@ -122,8 +122,8 @@  do {									\
  *	On success, return a pointer to struct mem_ctl_info pointer;
  *	%NULL otherwise
  */
-struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
-				   unsigned int n_layers,
+struct mem_ctl_info *edac_mc_alloc(int mc_idx,
+				   int n_layers,
 				   struct edac_mc_layer *layers,
 				   unsigned int sz_pvt);