[PATCH v2 19/20] EDAC, mc: Determine mci pointer from the error descriptor

[Robert Richter]

Each struct mci has its own error descriptor. Create a function
error_desc_to_mci() to determine the corresponding mci from an error
descriptor. This eases the parameter list of edac_raw_mc_handle_
error() as the mci pointer do not need to be passed any longer.

While at it, reorder parameters of edac_raw_mc_handle_error().

Signed-off-by: Robert Richter <rrichter@xxxxxxxxxxx>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
---
 drivers/edac/edac_mc.c   | 13 +++++++++----
 drivers/edac/edac_mc.h   |  8 +++-----
 drivers/edac/ghes_edac.c |  2 +-
 3 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 7b4f5e98dfe8..93eac968678e 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -1040,10 +1040,15 @@ static void edac_ue_error(struct mem_ctl_info *mci,
 	edac_inc_ue_error(mci, dimm, error_count);
 }
 
-void edac_raw_mc_handle_error(struct mem_ctl_info *mci,
-			      struct dimm_info *dimm,
-			      struct edac_raw_error_desc *e)
+static struct mem_ctl_info *error_desc_to_mci(struct edac_raw_error_desc *e)
+{
+	return container_of(e, struct mem_ctl_info, error_desc);
+}
+
+void edac_raw_mc_handle_error(struct edac_raw_error_desc *e,
+			      struct dimm_info *dimm)
 {
+	struct mem_ctl_info *mci = error_desc_to_mci(e);
 	char detail[80];
 	u8 grain_bits;
 
@@ -1242,6 +1247,6 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
 
 	dimm = edac_get_dimm(mci, top_layer, mid_layer, low_layer);
 
-	edac_raw_mc_handle_error(mci, dimm, e);
+	edac_raw_mc_handle_error(e, dimm);
 }
 EXPORT_SYMBOL_GPL(edac_mc_handle_error);
diff --git a/drivers/edac/edac_mc.h b/drivers/edac/edac_mc.h
index a8f1b5b5e873..3b01d5d9d7bc 100644
--- a/drivers/edac/edac_mc.h
+++ b/drivers/edac/edac_mc.h
@@ -212,17 +212,15 @@ extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
  * edac_raw_mc_handle_error() - Reports a memory event to userspace without
  *	doing anything to discover the error location.
  *
- * @mci:		a struct mem_ctl_info pointer
- * @dimm:		a struct dimm_info pointer
  * @e:			error description
+ * @dimm:		a struct dimm_info pointer
  *
  * This raw function is used internally by edac_mc_handle_error(). It should
  * only be called directly when the hardware error come directly from BIOS,
  * like in the case of APEI GHES driver.
  */
-void edac_raw_mc_handle_error(struct mem_ctl_info *mci,
-			      struct dimm_info *dimm,
-			      struct edac_raw_error_desc *e);
+void edac_raw_mc_handle_error(struct edac_raw_error_desc *e,
+			      struct dimm_info *dimm);
 
 /**
  * edac_mc_handle_error() - Reports a memory event to userspace.
diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index 7d325d70d6d3..c1bcfdbd6f82 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -441,7 +441,7 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
 
 	dimm = edac_get_dimm_by_index(mci, e->top_layer);
 
-	edac_raw_mc_handle_error(mci, dimm, e);
+	edac_raw_mc_handle_error(e, dimm);
 
 unlock:
 	spin_unlock_irqrestore(&ghes_lock, flags);
-- 
2.20.1