linux-kernel - [PATCH] acpi: apei: fix the wrongly parse generic error status block

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Message-ID: <1502388412-20273-1-git-send-email-gengdongjiu@huawei.com>
Date:   Fri, 11 Aug 2017 02:06:52 +0800
From:   Dongjiu Geng <gengdongjiu@...wei.com>
To:     <rjw@...ysocki.net>, <lenb@...nel.org>,
        <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <gengdongjiu@...wei.com>
Subject: [PATCH] acpi: apei: fix the wrongly parse generic error status block

The revision 0x300 generic error data entry is different with the old
version. when ghes_do_proc traverses to get the data entry, it does not
consider this difference. so when error status block has revision 0x300
data entry, it will have issue.

Signed-off-by: Dongjiu Geng <gengdongjiu@...wei.com>
---
 drivers/acpi/apei/apei-internal.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h
index 6e9f14c0a71b..6491f1c4a96e 100644
--- a/drivers/acpi/apei/apei-internal.h
+++ b/drivers/acpi/apei/apei-internal.h
@@ -122,8 +122,8 @@ struct dentry *apei_get_debugfs_dir(void);
 
 #define apei_estatus_for_each_section(estatus, section)			\
 	for (section = (struct acpi_hest_generic_data *)(estatus + 1);	\
-	     (void *)section - (void *)estatus < estatus->data_length;	\
-	     section = (void *)(section+1) + section->error_data_length)
+	     (void *)section - (void *)(estatus + 1) < estatus->data_length; \
+	     section = acpi_hest_get_next(section))
 
 static inline u32 cper_estatus_len(struct acpi_hest_generic_status *estatus)
 {
-- 
2.14.0