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It returns a pointer to a struct dimm_info. This makes the declaration and use of an index obsolete and avoids access to internal data of struct mci (direct array access etc). Signed-off-by: Robert Richter Reviewed-by: Mauro Carvalho Chehab --- drivers/edac/edac_mc.c | 19 +++++++++++-------- drivers/edac/edac_mc_sysfs.c | 29 ++++++++++++----------------- drivers/edac/ghes_edac.c | 9 +++++---- drivers/edac/i5100_edac.c | 13 +++++-------- include/linux/edac.h | 7 +++++++ 5 files changed, 40 insertions(+), 37 deletions(-) -- 2.20.1 diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c index 72088d49b03b..c5240bb4c6c0 100644 --- a/drivers/edac/edac_mc.c +++ b/drivers/edac/edac_mc.c @@ -145,15 +145,18 @@ static void edac_mc_dump_channel(struct rank_info *chan) edac_dbg(4, " channel->dimm = %p\n", chan->dimm); } -static void edac_mc_dump_dimm(struct dimm_info *dimm, int number) +static void edac_mc_dump_dimm(struct dimm_info *dimm) { char location[80]; + if (!dimm->nr_pages) + return; + edac_dimm_info_location(dimm, location, sizeof(location)); edac_dbg(4, "%s%i: %smapped as virtual row %d, chan %d\n", dimm->mci->csbased ? "rank" : "dimm", - number, location, dimm->csrow, dimm->cschannel); + dimm->idx, location, dimm->csrow, dimm->cschannel); edac_dbg(4, " dimm = %p\n", dimm); edac_dbg(4, " dimm->label = '%s'\n", dimm->label); edac_dbg(4, " dimm->nr_pages = 0x%x\n", dimm->nr_pages); @@ -702,6 +705,7 @@ EXPORT_SYMBOL_GPL(edac_get_owner); int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci, const struct attribute_group **groups) { + struct dimm_info *dimm; int ret = -EINVAL; edac_dbg(0, "\n"); @@ -726,9 +730,9 @@ int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci, if (csrow->channels[j]->dimm->nr_pages) edac_mc_dump_channel(csrow->channels[j]); } - for (i = 0; i < mci->tot_dimms; i++) - if (mci->dimms[i]->nr_pages) - edac_mc_dump_dimm(mci->dimms[i], i); + + mci_for_each_dimm(mci, dimm) + edac_mc_dump_dimm(dimm); } #endif mutex_lock(&mem_ctls_mutex); @@ -1086,6 +1090,7 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type, const char *msg, const char *other_detail) { + struct dimm_info *dimm; char *p; int row = -1, chan = -1; int pos[EDAC_MAX_LAYERS] = { top_layer, mid_layer, low_layer }; @@ -1146,9 +1151,7 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type, p = e->label; *p = '\0'; - for (i = 0; i < mci->tot_dimms; i++) { - struct dimm_info *dimm = mci->dimms[i]; - + mci_for_each_dimm(mci, dimm) { if (top_layer >= 0 && top_layer != dimm->location[0]) continue; if (mid_layer >= 0 && mid_layer != dimm->location[1]) diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c index 91e4c8f155af..0367554e7437 100644 --- a/drivers/edac/edac_mc_sysfs.c +++ b/drivers/edac/edac_mc_sysfs.c @@ -621,8 +621,7 @@ static const struct device_type dimm_attr_type = { /* Create a DIMM object under specifed memory controller device */ static int edac_create_dimm_object(struct mem_ctl_info *mci, - struct dimm_info *dimm, - int index) + struct dimm_info *dimm) { int err; dimm->mci = mci; @@ -632,9 +631,9 @@ static int edac_create_dimm_object(struct mem_ctl_info *mci, dimm->dev.parent = &mci->dev; if (mci->csbased) - dev_set_name(&dimm->dev, "rank%d", index); + dev_set_name(&dimm->dev, "rank%d", dimm->idx); else - dev_set_name(&dimm->dev, "dimm%d", index); + dev_set_name(&dimm->dev, "dimm%d", dimm->idx); dev_set_drvdata(&dimm->dev, dimm); pm_runtime_forbid(&mci->dev); @@ -916,7 +915,8 @@ static const struct device_type mci_attr_type = { int edac_create_sysfs_mci_device(struct mem_ctl_info *mci, const struct attribute_group **groups) { - int i, err; + struct dimm_info *dimm; + int err; /* get the /sys/devices/system/edac subsys reference */ mci->dev.type = &mci_attr_type; @@ -940,13 +940,12 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci, /* * Create the dimm/rank devices */ - for (i = 0; i < mci->tot_dimms; i++) { - struct dimm_info *dimm = mci->dimms[i]; + mci_for_each_dimm(mci, dimm) { /* Only expose populated DIMMs */ if (!dimm->nr_pages) continue; - err = edac_create_dimm_object(mci, dimm, i); + err = edac_create_dimm_object(mci, dimm); if (err) goto fail_unregister_dimm; } @@ -961,12 +960,9 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci, return 0; fail_unregister_dimm: - for (i--; i >= 0; i--) { - struct dimm_info *dimm = mci->dimms[i]; - if (!dimm->nr_pages) - continue; - - device_unregister(&dimm->dev); + mci_for_each_dimm(mci, dimm) { + if (device_is_registered(&dimm->dev)) + device_unregister(&dimm->dev); } device_unregister(&mci->dev); @@ -978,7 +974,7 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci, */ void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) { - int i; + struct dimm_info *dimm; edac_dbg(0, "\n"); @@ -989,8 +985,7 @@ void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci) edac_delete_csrow_objects(mci); #endif - for (i = 0; i < mci->tot_dimms; i++) { - struct dimm_info *dimm = mci->dimms[i]; + mci_for_each_dimm(mci, dimm) { if (dimm->nr_pages == 0) continue; edac_dbg(1, "unregistering device %s\n", dev_name(&dimm->dev)); diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c index d92cd99081d2..af27f8063891 100644 --- a/drivers/edac/ghes_edac.c +++ b/drivers/edac/ghes_edac.c @@ -90,12 +90,13 @@ static void ghes_edac_count_dimms(const struct dmi_header *dh, void *arg) static int get_dimm_smbios_index(struct mem_ctl_info *mci, u16 handle) { - int i; + struct dimm_info *dimm; - for (i = 0; i < mci->tot_dimms; i++) { - if (mci->dimms[i]->smbios_handle == handle) - return i; + mci_for_each_dimm(mci, dimm) { + if (dimm->smbios_handle == handle) + return dimm->idx; } + return -1; } diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c index 134586753311..0ddc41e47a96 100644 --- a/drivers/edac/i5100_edac.c +++ b/drivers/edac/i5100_edac.c @@ -846,20 +846,17 @@ static void i5100_init_interleaving(struct pci_dev *pdev, static void i5100_init_csrows(struct mem_ctl_info *mci) { - int i; struct i5100_priv *priv = mci->pvt_info; + struct dimm_info *dimm; - for (i = 0; i < mci->tot_dimms; i++) { - struct dimm_info *dimm; - const unsigned long npages = i5100_npages(mci, i); - const unsigned int chan = i5100_csrow_to_chan(mci, i); - const unsigned int rank = i5100_csrow_to_rank(mci, i); + mci_for_each_dimm(mci, dimm) { + const unsigned long npages = i5100_npages(mci, dimm->idx); + const unsigned int chan = i5100_csrow_to_chan(mci, dimm->idx); + const unsigned int rank = i5100_csrow_to_rank(mci, dimm->idx); if (!npages) continue; - dimm = edac_get_dimm(mci, chan, rank, 0); - dimm->nr_pages = npages; dimm->grain = 32; dimm->dtype = (priv->mtr[chan][rank].width == 4) ? diff --git a/include/linux/edac.h b/include/linux/edac.h index 79c5564ee314..8beb6e834be9 100644 --- a/include/linux/edac.h +++ b/include/linux/edac.h @@ -599,6 +599,13 @@ struct mem_ctl_info { u16 fake_inject_count; }; +#define mci_for_each_dimm(mci, dimm) \ + for ((dimm) = (mci)->dimms[0]; \ + (dimm); \ + (dimm) = (dimm)->idx + 1 < (mci)->tot_dimms \ + ? (mci)->dimms[(dimm)->idx + 1] \ + : NULL) + /** * edac_get_dimm_by_index - Get DIMM info from a memory controller * given by an index