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authorRobert Richter <rrichter@marvell.com>2019-11-06 09:33:04 +0000
committerBorislav Petkov <bp@suse.de>2019-11-09 11:23:49 +0100
commit977b1ce7c117905b3138dc727ed25f8af2ba2902 (patch)
tree369bf783839852762d60d57fa5f3d4344989e9e0 /drivers/edac
parentbc9ad9e40dbc4c8874e806345df393a9cfeadad3 (diff)
downloadlinux-977b1ce7c117905b3138dc727ed25f8af2ba2902.tar.bz2
EDAC: Remove EDAC_DIMM_OFF() macro
The EDAC_DIMM_OFF() macro takes 5 arguments to get the DIMM's index. Simplify this by storing the index in struct dimm_info to avoid its calculation and remove the EDAC_DIMM_OFF() macro. The index can be directly used then. Another advantage is that edac_mc_alloc() could be used even if the exact size of the layers is unknown. Only the number of DIMMs would be needed. Rename iterator variable to idx, while at it. The name is more handy, esp. when searching for it in the code. Signed-off-by: Robert Richter <rrichter@marvell.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: "linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org> Cc: James Morse <james.morse@arm.com> Cc: Tony Luck <tony.luck@intel.com> Link: https://lkml.kernel.org/r/20191106093239.25517-3-rrichter@marvell.com
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/edac_mc.c28
-rw-r--r--drivers/edac/edac_mc_sysfs.c20
2 files changed, 17 insertions, 31 deletions
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index e6fd079783bd..cb5356411251 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -314,25 +314,27 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
struct dimm_info *dimm;
u32 *ce_per_layer[EDAC_MAX_LAYERS], *ue_per_layer[EDAC_MAX_LAYERS];
unsigned int pos[EDAC_MAX_LAYERS];
- unsigned int size, tot_dimms = 1, count = 1;
+ unsigned int idx, size, tot_dimms = 1, count = 1;
unsigned int tot_csrows = 1, tot_channels = 1, tot_errcount = 0;
void *pvt, *p, *ptr = NULL;
- int i, j, row, chn, n, len, off;
+ int i, j, row, chn, n, len;
bool per_rank = false;
BUG_ON(n_layers > EDAC_MAX_LAYERS || n_layers == 0);
+
/*
* Calculate the total amount of dimms and csrows/cschannels while
* in the old API emulation mode
*/
- for (i = 0; i < n_layers; i++) {
- tot_dimms *= layers[i].size;
- if (layers[i].is_virt_csrow)
- tot_csrows *= layers[i].size;
+ for (idx = 0; idx < n_layers; idx++) {
+ tot_dimms *= layers[idx].size;
+
+ if (layers[idx].is_virt_csrow)
+ tot_csrows *= layers[idx].size;
else
- tot_channels *= layers[i].size;
+ tot_channels *= layers[idx].size;
- if (layers[i].type == EDAC_MC_LAYER_CHIP_SELECT)
+ if (layers[idx].type == EDAC_MC_LAYER_CHIP_SELECT)
per_rank = true;
}
@@ -425,19 +427,15 @@ struct mem_ctl_info *edac_mc_alloc(unsigned int mc_num,
memset(&pos, 0, sizeof(pos));
row = 0;
chn = 0;
- for (i = 0; i < tot_dimms; i++) {
+ for (idx = 0; idx < tot_dimms; idx++) {
chan = mci->csrows[row]->channels[chn];
- off = EDAC_DIMM_OFF(layer, n_layers, pos[0], pos[1], pos[2]);
- if (off < 0 || off >= tot_dimms) {
- edac_mc_printk(mci, KERN_ERR, "EDAC core bug: EDAC_DIMM_OFF is trying to do an illegal data access\n");
- goto error;
- }
dimm = kzalloc(sizeof(**mci->dimms), GFP_KERNEL);
if (!dimm)
goto error;
- mci->dimms[off] = dimm;
+ mci->dimms[idx] = dimm;
dimm->mci = mci;
+ dimm->idx = idx;
/*
* Copy DIMM location and initialize it.
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
index 32d016f1ecd1..91e4c8f155af 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -557,14 +557,8 @@ static ssize_t dimmdev_ce_count_show(struct device *dev,
{
struct dimm_info *dimm = to_dimm(dev);
u32 count;
- int off;
-
- off = EDAC_DIMM_OFF(dimm->mci->layers,
- dimm->mci->n_layers,
- dimm->location[0],
- dimm->location[1],
- dimm->location[2]);
- count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][off];
+
+ count = dimm->mci->ce_per_layer[dimm->mci->n_layers-1][dimm->idx];
return sprintf(data, "%u\n", count);
}
@@ -574,14 +568,8 @@ static ssize_t dimmdev_ue_count_show(struct device *dev,
{
struct dimm_info *dimm = to_dimm(dev);
u32 count;
- int off;
-
- off = EDAC_DIMM_OFF(dimm->mci->layers,
- dimm->mci->n_layers,
- dimm->location[0],
- dimm->location[1],
- dimm->location[2]);
- count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][off];
+
+ count = dimm->mci->ue_per_layer[dimm->mci->n_layers-1][dimm->idx];
return sprintf(data, "%u\n", count);
}