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Date: Wed, 22 Apr 2020 13:58:12 +0200
From: Robert Richter <rrichter@...vell.com>
To: Borislav Petkov <bp@...en8.de>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Tony Luck <tony.luck@...el.com>
CC: James Morse <james.morse@....com>,
Aristeu Rozanski <aris@...hat.com>,
Robert Richter <rrichter@...vell.com>,
Matthias Brugger <mbrugger@...e.com>,
<linux-edac@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 08/10] EDAC/ghes: Carve out MC device handling into separate functions
The functions are too long, carve out code that handles MC devices
into the new functions ghes_mc_create(), ghes_mc_add_or_free() and
ghes_mc_free(). Apart from better code readability the functions can
be reused and the implementation of the error paths becomes easier.
Signed-off-by: Robert Richter <rrichter@...vell.com>
---
drivers/edac/ghes_edac.c | 141 +++++++++++++++++++++++----------------
1 file changed, 83 insertions(+), 58 deletions(-)
diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index 4eadc5b344c8..af0a769071f4 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -535,16 +535,88 @@ static struct acpi_platform_list plat_list[] = {
{ } /* End */
};
-int ghes_edac_register(struct ghes *ghes, struct device *dev)
+static struct mem_ctl_info *ghes_mc_create(struct device *dev, int mc_idx,
+ int num_dimm)
{
- bool fake = false;
- int rc = 0, num_dimm = 0;
+ struct edac_mc_layer layers[1];
struct mem_ctl_info *mci;
struct ghes_mci *pvt;
- struct edac_mc_layer layers[1];
- struct dimm_fill dimm_fill;
+
+ layers[0].type = EDAC_MC_LAYER_ALL_MEM;
+ layers[0].size = num_dimm;
+ layers[0].is_virt_csrow = true;
+
+ mci = edac_mc_alloc(mc_idx, ARRAY_SIZE(layers), layers, sizeof(*pvt));
+ if (!mci)
+ return NULL;
+
+ pvt = mci->pvt_info;
+ pvt->mci = mci;
+
+ mci->pdev = dev;
+ mci->mtype_cap = MEM_FLAG_EMPTY;
+ mci->edac_ctl_cap = EDAC_FLAG_NONE;
+ mci->edac_cap = EDAC_FLAG_NONE;
+ mci->mod_name = "ghes_edac.c";
+ mci->ctl_name = "ghes_edac";
+ mci->dev_name = "ghes";
+
+ return mci;
+}
+
+static int ghes_mc_add_or_free(struct mem_ctl_info *mci,
+ struct list_head *dimm_list)
+{
unsigned long flags;
- int idx = -1;
+ int rc;
+
+ rc = edac_mc_add_mc(mci);
+ if (rc < 0) {
+ ghes_dimm_release(dimm_list);
+ edac_mc_free(mci);
+ return rc;
+ }
+
+ spin_lock_irqsave(&ghes_lock, flags);
+ ghes_pvt = mci->pvt_info;
+ list_splice_tail(dimm_list, &ghes_dimm_list);
+ spin_unlock_irqrestore(&ghes_lock, flags);
+
+ return 0;
+}
+
+static void ghes_mc_free(void)
+{
+ struct mem_ctl_info *mci;
+ unsigned long flags;
+ LIST_HEAD(dimm_list);
+
+ /*
+ * Wait for the irq handler being finished.
+ */
+ spin_lock_irqsave(&ghes_lock, flags);
+ mci = ghes_pvt ? ghes_pvt->mci : NULL;
+ ghes_pvt = NULL;
+ list_splice_init(&ghes_dimm_list, &dimm_list);
+ spin_unlock_irqrestore(&ghes_lock, flags);
+
+ ghes_dimm_release(&dimm_list);
+
+ if (!mci)
+ return;
+
+ mci = edac_mc_del_mc(mci->pdev);
+ if (mci)
+ edac_mc_free(mci);
+}
+
+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)) {
/* Check if safe to enable on this system */
@@ -577,27 +649,12 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
num_dimm = 1;
}
- layers[0].type = EDAC_MC_LAYER_ALL_MEM;
- layers[0].size = num_dimm;
- layers[0].is_virt_csrow = true;
-
- mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, sizeof(*pvt));
+ mci = ghes_mc_create(dev, 0, num_dimm);
if (!mci) {
rc = -ENOMEM;
goto unlock;
}
- pvt = mci->pvt_info;
- pvt->mci = mci;
-
- mci->pdev = dev;
- mci->mtype_cap = MEM_FLAG_EMPTY;
- mci->edac_ctl_cap = EDAC_FLAG_NONE;
- mci->edac_cap = EDAC_FLAG_NONE;
- mci->mod_name = "ghes_edac.c";
- mci->ctl_name = "ghes_edac";
- mci->dev_name = "ghes";
-
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");
@@ -627,18 +684,9 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
dimm->edac_mode = EDAC_SECDED;
}
- rc = edac_mc_add_mc(mci);
- if (rc < 0) {
- ghes_dimm_release(&dimm_fill.dimms);
- edac_mc_free(mci);
- rc = -ENODEV;
+ rc = ghes_mc_add_or_free(mci, &dimm_fill.dimms);
+ if (rc < 0)
goto unlock;
- }
-
- spin_lock_irqsave(&ghes_lock, flags);
- ghes_pvt = pvt;
- list_splice_tail(&dimm_fill.dimms, &ghes_dimm_list);
- spin_unlock_irqrestore(&ghes_lock, flags);
/* only set on success */
refcount_set(&ghes_refcount, 1);
@@ -656,35 +704,12 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
void ghes_edac_unregister(struct ghes *ghes)
{
- struct mem_ctl_info *mci;
- unsigned long flags;
- LIST_HEAD(dimm_list);
-
mutex_lock(&ghes_reg_mutex);
- if (!refcount_dec_and_test(&ghes_refcount))
- goto unlock;
-
- /*
- * Wait for the irq handler being finished.
- */
- spin_lock_irqsave(&ghes_lock, flags);
- mci = ghes_pvt ? ghes_pvt->mci : NULL;
- ghes_pvt = NULL;
- list_splice_init(&ghes_dimm_list, &dimm_list);
- spin_unlock_irqrestore(&ghes_lock, flags);
-
- ghes_dimm_release(&dimm_list);
-
- if (!mci)
- goto unlock;
-
- mci = edac_mc_del_mc(mci->pdev);
- if (mci) {
- edac_mc_free(mci);
+ if (refcount_dec_and_test(&ghes_refcount)) {
+ ghes_mc_free();
ghes_dimm_pool_destroy();
}
-unlock:
mutex_unlock(&ghes_reg_mutex);
}
--
2.20.1
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