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s390/qeth: use correct length field in SNMP cmd callback 

qeth_snmp_command_cb() is the only cmd callback that pulls the reply's
data length from a low-level transport header field. This requires
additional complexity (ie. reply->offset) to make the header accessible
to what is supposed to be a pure IPA cmd callback.

Adapter cmds have a length field in their sub-cmd header, get the data
length from there instead.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2019-08-20 16:46:37 +02:00 committed by David S. Miller
parent 12fc286f84
commit 7c5f8ffb33
2 changed files with 16 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/s390/net/qeth_core.h
View File

@ -634,7 +634,6 @@ struct qeth_reply {
int (*callback)(struct qeth_card *, struct qeth_reply *,
unsigned long);
u32 seqno;
unsigned long offset;
int rc;
void *param;
refcount_t refcnt;

42
drivers/s390/net/qeth_core_main.c
View File

@ -807,17 +807,12 @@ static void qeth_issue_next_read_cb(struct qeth_card *card,
}
spin_lock_irqsave(&reply->lock, flags);
if (reply->rc) {
if (reply->rc)
/* Bail out when the requestor has already left: */
rc = reply->rc;
} else {
if (cmd) {
reply->offset = (u16)((char *)cmd - (char *)iob->data);
rc = reply->callback(card, reply, (unsigned long)cmd);
} else {
rc = reply->callback(card, reply, (unsigned long)iob);
}
}
else
rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
(unsigned long)iob);
spin_unlock_irqrestore(&reply->lock, flags);
no_callback:
@ -4335,20 +4330,16 @@ static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
}
static int qeth_snmp_command_cb(struct qeth_card *card,
struct qeth_reply *reply, unsigned long sdata)
struct qeth_reply *reply, unsigned long data)
{
struct qeth_ipa_cmd *cmd;
struct qeth_arp_query_info *qinfo;
unsigned char *data;
struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
struct qeth_arp_query_info *qinfo = reply->param;
struct qeth_ipacmd_setadpparms *adp_cmd;
unsigned int data_len;
void *snmp_data;
__u16 data_len;
QETH_CARD_TEXT(card, 3, "snpcmdcb");
cmd = (struct qeth_ipa_cmd *) sdata;
data = (unsigned char *)((char *)cmd - reply->offset);
qinfo = (struct qeth_arp_query_info *) reply->param;
if (cmd->hdr.return_code) {
QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
return -EIO;
@ -4359,15 +4350,14 @@ static int qeth_snmp_command_cb(struct qeth_card *card,
QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
return -EIO;
}
data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
if (cmd->data.setadapterparms.hdr.seq_no == 1) {
snmp_data = &cmd->data.setadapterparms.data.snmp;
data_len -= offsetof(struct qeth_ipa_cmd,
data.setadapterparms.data.snmp);
adp_cmd = &cmd->data.setadapterparms;
data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
if (adp_cmd->hdr.seq_no == 1) {
snmp_data = &adp_cmd->data.snmp;
} else {
snmp_data = &cmd->data.setadapterparms.data.snmp.request;
data_len -= offsetof(struct qeth_ipa_cmd,
data.setadapterparms.data.snmp.request);
snmp_data = &adp_cmd->data.snmp.request;
data_len -= offsetof(struct qeth_snmp_cmd, request);
}
/* check if there is enough room in userspace */