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 09/10] EDAC/ghes: Have a separate code path for creating the fake MC
Date: Wed, 22 Apr 2020 13:58:13 +0200 [thread overview]
Message-ID: <20200422115814.22205-10-rrichter@marvell.com> (raw)
In-Reply-To: <20200422115814.22205-1-rrichter@marvell.com>
The code in ghes_edac_register() switches back and forth between
standard and fake controller creation. Do one thing only and separate
the code path that creates the fake MC.
Note: For better review the code is not yet carved out in separate
functions.
Signed-off-by: Robert Richter <rrichter@marvell.com>
---
drivers/edac/ghes_edac.c | 68 +++++++++++++++++++++++++---------------
1 file changed, 42 insertions(+), 26 deletions(-)
diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index af0a769071f4..af72da156696 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -615,7 +615,6 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
struct dimm_fill dimm_fill;
int rc = 0, num_dimm = 0;
struct mem_ctl_info *mci;
- bool fake = false;
int idx;
if (IS_ENABLED(CONFIG_X86)) {
@@ -643,23 +642,43 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
if (rc < 0)
goto unlock;
- /* Check if we've got a bogus BIOS */
- if (num_dimm == 0) {
- fake = true;
- num_dimm = 1;
- }
+ if (!num_dimm) {
+ /*
+ * Bogus BIOS: Ignore DMI topology and use a single MC
+ * with only one DIMM for the whole address range to
+ * catch all errros.
+ */
+ struct dimm_info *dimm;
+ LIST_HEAD(empty);
- mci = ghes_mc_create(dev, 0, num_dimm);
- if (!mci) {
- rc = -ENOMEM;
- goto unlock;
- }
+ mci = ghes_mc_create(dev, 0, 1);
+ if (!mci) {
+ rc = -ENOMEM;
+ goto unlock;
+ }
+
+ dimm = edac_get_dimm_by_index(mci, 0);
+
+ dimm->nr_pages = 1;
+ dimm->grain = 128;
+ dimm->mtype = MEM_UNKNOWN;
+ dimm->dtype = DEV_UNKNOWN;
+ dimm->edac_mode = EDAC_SECDED;
+
+ snprintf(dimm->label, sizeof(dimm->label), "unknown memory");
+
+ rc = ghes_mc_add_or_free(mci, &empty);
+ if (rc)
+ goto unlock;
- if (fake) {
pr_info("This system has a very crappy BIOS: It doesn't even list the DIMMS.\n");
pr_info("Its SMBIOS info is wrong. It is doubtful that the error report would\n");
pr_info("work on such system. Use this driver with caution\n");
- } else if (idx < 0) {
+
+ goto out;
+ }
+
+ if (idx < 0) {
pr_info("This EDAC driver relies on BIOS to enumerate memory and get error reports.\n");
pr_info("Unfortunately, not all BIOSes reflect the memory layout correctly.\n");
pr_info("So, the end result of using this driver varies from vendor to vendor.\n");
@@ -668,26 +687,23 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
pr_info("This system has %d DIMM sockets.\n", num_dimm);
}
- INIT_LIST_HEAD(&dimm_fill.dimms);
+ mci = ghes_mc_create(dev, 0, num_dimm);
+ if (!mci) {
+ rc = -ENOMEM;
+ goto unlock;
+ }
- if (!fake) {
- dimm_fill.index = 0;
- dimm_fill.mci = mci;
- dmi_walk(ghes_edac_dmidecode, &dimm_fill);
- } else {
- struct dimm_info *dimm = edac_get_dimm_by_index(mci, 0);
+ dimm_fill.index = 0;
+ dimm_fill.mci = mci;
+ INIT_LIST_HEAD(&dimm_fill.dimms);
- dimm->nr_pages = 1;
- dimm->grain = 128;
- dimm->mtype = MEM_UNKNOWN;
- dimm->dtype = DEV_UNKNOWN;
- dimm->edac_mode = EDAC_SECDED;
- }
+ dmi_walk(ghes_edac_dmidecode, &dimm_fill);
rc = ghes_mc_add_or_free(mci, &dimm_fill.dimms);
if (rc < 0)
goto unlock;
+out:
/* only set on success */
refcount_set(&ghes_refcount, 1);
--
2.20.1
next prev parent reply other threads:[~2020-04-22 11:59 UTC|newest]
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 ` [PATCH v2 02/10] EDAC/mc: Use int type for parameters of edac_mc_alloc() Robert Richter
2020-04-23 17:49 ` 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 ` Robert Richter [this message]
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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