diff options
| author | Adrian Huang <adrian.huang@hp.com> | 2012-12-15 03:30:07 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-01-03 16:10:20 +0400 |
| commit | 6780aa683d4d83ed887dd07b7987947d339d76f1 (patch) | |
| tree | aacc6936e42d2cd73a98439987c3b7efa361eed4 /drivers/acpi | |
| parent | d1c3ed669a2d452cacfb48c2d171a1f364dae2ed (diff) | |
| download | linux-6780aa683d4d83ed887dd07b7987947d339d76f1.tar.xz | |
ACPI / APEI: Fix the returned value in erst_dbg_read
If the persistent store is empty initially, the function 'erst_dbg_read'
returns a nonzero value. The better way is to return a zero indicating the
read operation reaches EOF.
Tested on two different servers.
Signed-off-by: Adrian Huang <adrian.huang@hp.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/apei/erst-dbg.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c index 903549df809b..04ab5c9d3ced 100644 --- a/drivers/acpi/apei/erst-dbg.c +++ b/drivers/acpi/apei/erst-dbg.c @@ -111,8 +111,17 @@ retry_next: if (rc) goto out; /* no more record */ - if (id == APEI_ERST_INVALID_RECORD_ID) + if (id == APEI_ERST_INVALID_RECORD_ID) { + /* + * If the persistent store is empty initially, the function + * 'erst_read' below will return "-ENOENT" value. This causes + * 'retry_next' label is entered again. The returned value + * should be zero indicating the read operation is EOF. + */ + len = 0; + goto out; + } retry: rc = len = erst_read(id, erst_dbg_buf, erst_dbg_buf_len); /* The record may be cleared by others, try read next record */ |