[PATCH v8 02/26] ACPI / APEI: Remove silent flag from ghes_read_estatus()

From: James Morse <james.morse@arm.com>
To: linux-acpi@vger.kernel.org
Cc: Rafael Wysocki <rjw@rjwysocki.net>,
	Tony Luck <tony.luck@intel.com>, Xie XiuQi <xiexiuqi@huawei.com>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Christoffer Dall <christoffer.dall@arm.com>,
	Dongjiu Geng <gengdongjiu@huawei.com>,
	linux-mm@kvack.org, Borislav Petkov <bp@alien8.de>,
	james.morse@arm.com, Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	kvmarm@lists.cs.columbia.edu,
	linux-arm-kernel@lists.infradead.org, Len Brown <lenb@kernel.org>
Subject: [PATCH v8 02/26] ACPI / APEI: Remove silent flag from ghes_read_estatus()
Date: Tue, 29 Jan 2019 18:48:38 +0000	[thread overview]
Message-ID: <20190129184902.102850-3-james.morse@arm.com> (raw)
In-Reply-To: <20190129184902.102850-1-james.morse@arm.com>

Subsequent patches will split up ghes_read_estatus(), at which
point passing around the 'silent' flag gets annoying. This is to
suppress prink() messages, which prior to commit 42a0bb3f7138
("printk/nmi: generic solution for safe printk in NMI"), were
unsafe in NMI context.

This is no longer necessary, remove the flag. printk() messages
are batched in a per-cpu buffer and printed via irq-work, or a call
back from panic().

Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Borislav Petkov <bp@suse.de>

---
Changes since v6:
 * Moved earlier in the series,
 * Tinkered with the commit message.
 * switched to pr_warn_ratelimited() to shut checkpatch up
---
 drivers/acpi/apei/ghes.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 0c46b79e31b1..f0a704aed040 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -324,7 +324,7 @@ static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
 	}
 }
 
-static int ghes_read_estatus(struct ghes *ghes, int silent)
+static int ghes_read_estatus(struct ghes *ghes)
 {
 	struct acpi_hest_generic *g = ghes->generic;
 	u64 buf_paddr;
@@ -333,8 +333,7 @@ static int ghes_read_estatus(struct ghes *ghes, int silent)
 
 	rc = apei_read(&buf_paddr, &g->error_status_address);
 	if (rc) {
-		if (!silent && printk_ratelimit())
-			pr_warning(FW_WARN GHES_PFX
+		pr_warn_ratelimited(FW_WARN GHES_PFX
 "Failed to read error status block address for hardware error source: %d.\n",
 				   g->header.source_id);
 		return -EIO;
@@ -366,9 +365,9 @@ static int ghes_read_estatus(struct ghes *ghes, int silent)
 	rc = 0;
 
 err_read_block:
-	if (rc && !silent && printk_ratelimit())
-		pr_warning(FW_WARN GHES_PFX
-			   "Failed to read error status block!\n");
+	if (rc)
+		pr_warn_ratelimited(FW_WARN GHES_PFX
+				    "Failed to read error status block!\n");
 	return rc;
 }
 
@@ -702,7 +701,7 @@ static int ghes_proc(struct ghes *ghes)
 {
 	int rc;
 
-	rc = ghes_read_estatus(ghes, 0);
+	rc = ghes_read_estatus(ghes);
 	if (rc)
 		goto out;
 
@@ -939,7 +938,7 @@ static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
 		return ret;
 
 	list_for_each_entry_rcu(ghes, &ghes_nmi, list) {
-		if (ghes_read_estatus(ghes, 1)) {
+		if (ghes_read_estatus(ghes)) {
 			ghes_clear_estatus(ghes);
 			continue;
 		} else {
-- 
2.20.1


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