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authorJeremy Kerr <jk@ozlabs.org>2017-08-25 15:47:23 +0800
committerCorey Minyard <cminyard@mvista.com>2017-09-27 16:03:45 -0500
commitc468f911b73beb39b20f7e5f97a35d41f038b31b (patch)
tree7695d0f263fff5a5b46e270328d8390f4f5cdd59 /include/linux/ipmi_smi.h
parenta9137c3dfae9f371e302ee3fc6658f0fe6b904e7 (diff)
ipmi: Make ipmi_demangle_device_id more generic
Currently, ipmi_demagle_device_id requires a full response buffer in its data argument. This means we can't use it to parse a response in a struct ipmi_recv_msg, which has the netfn and cmd as separate bytes. This change alters the definition and users of ipmi_demangle_device_id to use a split netfn, cmd and data buffer, so it can be used with non-sequential responses. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Fixed the ipmi_ssif.c and ipmi_si_intf.c changes to use data from the response, not the data from the message, when passing info to the ipmi_demangle_device_id() function. Signed-off-by: Corey Minyard <cminyard@mvista.com>
Diffstat (limited to 'include/linux/ipmi_smi.h')
-rw-r--r--include/linux/ipmi_smi.h24
1 files changed, 12 insertions, 12 deletions
diff --git a/include/linux/ipmi_smi.h b/include/linux/ipmi_smi.h
index f8cea14485dd..75542c837c07 100644
--- a/include/linux/ipmi_smi.h
+++ b/include/linux/ipmi_smi.h
@@ -162,27 +162,27 @@ struct ipmi_device_id {
#define ipmi_version_major(v) ((v)->ipmi_version & 0xf)
#define ipmi_version_minor(v) ((v)->ipmi_version >> 4)
-/* Take a pointer to a raw data buffer and a length and extract device
- id information from it. The first byte of data must point to the
- netfn << 2, the data should be of the format:
- netfn << 2, cmd, completion code, data
- as normally comes from a device interface. */
-static inline int ipmi_demangle_device_id(const unsigned char *data,
+/* Take a pointer to an IPMI response and extract device id information from
+ * it. @netfn is in the IPMI_NETFN_ format, so may need to be shifted from
+ * a SI response.
+ */
+static inline int ipmi_demangle_device_id(uint8_t netfn, uint8_t cmd,
+ const unsigned char *data,
unsigned int data_len,
struct ipmi_device_id *id)
{
- if (data_len < 9)
+ if (data_len < 7)
return -EINVAL;
- if (data[0] != IPMI_NETFN_APP_RESPONSE << 2 ||
- data[1] != IPMI_GET_DEVICE_ID_CMD)
+ if (netfn != IPMI_NETFN_APP_RESPONSE || cmd != IPMI_GET_DEVICE_ID_CMD)
/* Strange, didn't get the response we expected. */
return -EINVAL;
- if (data[2] != 0)
+ if (data[0] != 0)
/* That's odd, it shouldn't be able to fail. */
return -EINVAL;
- data += 3;
- data_len -= 3;
+ data++;
+ data_len--;
+
id->device_id = data[0];
id->device_revision = data[1];
id->firmware_revision_1 = data[2];