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| author | Darrick J. Wong <djwong@us.ibm.com> | 2008-08-15 09:40:40 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-15 17:35:44 +0200 |
| commit | 9c5413eac5199b8457689eb2c9d9e75138356bd6 (patch) | |
| tree | 74865a1e85daa8e21c140c1ecb1de55fbbb08b50 /drivers/hwmon/ibmaem.c | |
| parent | ibmaem: update the documentation to reflect the current name (diff) | |
| download | linux-9c5413eac5199b8457689eb2c9d9e75138356bd6.tar.xz linux-9c5413eac5199b8457689eb2c9d9e75138356bd6.zip | |
ibmaem: prevent infinite probing loop on x3650 M2 systems
On older machines, probing for a nonexistent AEM interface returned an
IPMI error; when we saw this, we'd stop probing. On the x3650 M2 and
(presumably) later, we are returned a value indicating success and a
buffer full of garbage or zeroes. This causes the probe function to run
in an infinite loop. To fix this, we add one last check--if the
interface number we're looking for is higher than the number of
interfaces that AEM claims to have, stop probing.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/hwmon/ibmaem.c')
| -rw-r--r-- | drivers/hwmon/ibmaem.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c index 5e4775a62f6c..08c5179e6d84 100644 --- a/drivers/hwmon/ibmaem.c +++ b/drivers/hwmon/ibmaem.c @@ -676,7 +676,8 @@ static int aem_find_aem2(struct aem_ipmi_data *data, return -ETIMEDOUT; if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) || - memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id))) + memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) || + fi_resp->num_instances <= instance_num) return -ENOENT; return 0; |