[PATCH 06/48] ACPI, APEI, Report GHES error information via printk

Len Brown
2011-01-12T10:20:02Z

From: Huang Ying <ying.huang@intel.com>

printk is one of the methods to report hardware errors to user space.
This patch implements hardware error reporting for GHES via printk.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/acpi/apei/ghes.c | 25 +++++++++++++++++++++----
1 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 0d505e5..51905d0 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -43,6 +43,7 @@
#include <linux/kdebug.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
+#include <linux/ratelimit.h>
#include <acpi/apei.h>
#include <acpi/atomicio.h>
#include <acpi/hed.h>
@@ -255,11 +256,26 @@ static void ghes_do_proc(struct ghes *ghes)
}
#endif
}
+}

- if (!processed && printk_ratelimit())
- pr_warning(GHES_PFX
- "Unknown error record from generic hardware error source: %d\n",
- ghes->generic->header.source_id);
+static void ghes_print_estatus(const char *pfx, struct ghes *ghes)
+{
+ /* Not more than 2 messages every 5 seconds */
+ static DEFINE_RATELIMIT_STATE(ratelimit, 5*HZ, 2);
+
+ if (pfx == NULL) {
+ if (ghes_severity(ghes->estatus->error_severity) <=
+ GHES_SEV_CORRECTED)
+ pfx = KERN_WARNING HW_ERR;
+ else
+ pfx = KERN_ERR HW_ERR;
+ }
+ if (__ratelimit(&ratelimit)) {
+ printk(
+ "%s""Hardware error from APEI Generic Hardware Error Source: %d\n",
+ pfx, ghes->generic->header.source_id);
+ apei_estatus_print(pfx, ghes->estatus);
+ }
}

static int ghes_proc(struct ghes *ghes)
@@ -269,6 +285,7 @@ static int ghes_proc(struct ghes *ghes)
rc = ghes_read_estatus(ghes, 0);
if (rc)
goto out;
+ ghes_print_estatus(NULL, ghes);
ghes_do_proc(ghes);

out:
--
1.7.4.rc1.7.g2cf08