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From: Robert Richter <rrichter@marvell.com>
To: Borislav Petkov <bp@alien8.de>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Tony Luck <tony.luck@intel.com>
Cc: James Morse <james.morse@arm.com>,
	Aristeu Rozanski <aris@redhat.com>,
	Robert Richter <rrichter@marvell.com>,
	Matthias Brugger <mbrugger@suse.com>,
	<linux-edac@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v2 02/10] EDAC/mc: Use int type for parameters of edac_mc_alloc()
Date: Wed, 22 Apr 2020 13:58:06 +0200
Message-ID: <20200422115814.22205-3-rrichter@marvell.com> (raw)
In-Reply-To: <20200422115814.22205-1-rrichter@marvell.com>

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(-)

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 107d7c4de933..57d1d356d69c 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);
 
-- 
2.20.1


  parent reply index

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-22 11:58 [PATCH v2 00/10] EDAC/mc/ghes: Fixes, cleanup and reworks Robert Richter
2020-04-22 11:58 ` [PATCH v2 01/10] EDAC/mc: Fix usage of snprintf() and dimm location setup Robert Richter
2020-04-22 20:52   ` Borislav Petkov
2020-05-19  9:27     ` Robert Richter
2020-04-22 11:58 ` Robert Richter [this message]
2020-04-23 17:49   ` [PATCH v2 02/10] EDAC/mc: Use int type for parameters of edac_mc_alloc() Borislav Petkov
2020-05-19  9:33     ` Robert Richter
2020-04-22 11:58 ` [PATCH v2 03/10] EDAC/ghes: Remove unused members of struct ghes_edac_pvt, rename it to ghes_mci Robert Richter
2020-04-23 17:55   ` Borislav Petkov
2020-05-05  7:50     ` Robert Richter
2020-04-22 11:58 ` [PATCH v2 04/10] EDAC/ghes: Make SMBIOS handle private data to ghes Robert Richter
2020-04-24 12:12   ` kbuild test robot
2020-04-24 16:21   ` Borislav Petkov
2020-05-05 12:48     ` Robert Richter
2020-04-22 11:58 ` [PATCH v2 05/10] EDAC/ghes: Setup DIMM label from DMI and use it in error reports Robert Richter
2020-04-22 11:58 ` [PATCH v2 06/10] EDAC/ghes: Remove local variable rdr_mask in ghes_edac_dmidecode() Robert Richter
2020-04-27  7:08   ` Borislav Petkov
2020-04-27 17:24     ` Luck, Tony
2020-04-27 17:34       ` Borislav Petkov
2020-05-19  9:34         ` Robert Richter
2020-04-22 11:58 ` [PATCH v2 07/10] EDAC/ghes: Cleanup struct ghes_edac_dimm_fill, rename it to ghes_dimm_fill Robert Richter
2020-04-27 14:00   ` Borislav Petkov
2020-05-19  9:35     ` Robert Richter
2020-04-22 11:58 ` [PATCH v2 08/10] EDAC/ghes: Carve out MC device handling into separate functions Robert Richter
2020-04-27 16:38   ` Borislav Petkov
2020-05-06  8:45     ` Robert Richter
2020-05-11 13:32       ` Borislav Petkov
2020-05-19  9:57         ` Robert Richter
2020-04-22 11:58 ` [PATCH v2 09/10] EDAC/ghes: Have a separate code path for creating the fake MC Robert Richter
2020-04-22 11:58 ` [PATCH v2 10/10] EDAC/ghes: Carve out code into ghes_edac_register_{one,fake}() Robert Richter
2020-05-06  8:53 ` [PATCH v2 00/10] EDAC/mc/ghes: Fixes, cleanup and reworks Robert Richter

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