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Merge branch 's390-qeth-fixes'

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Julian Wiedmann says:

====================
s390/qeth: fixes 2018-02-09

please apply the following two qeth patches for 4.16 and stable.

One restricts a command quirk to the intended commandd type,
while the other fixes an off-by-one during data transmission
that can cause qeth to build malformed buffer descriptors.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-02-09 14:30:23 -05:00
commit 7b30d51a8f
2 changed files with 14 additions and 7 deletions
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7
drivers/s390/net/qeth_core.h
View file

@ -591,6 +591,11 @@ struct qeth_cmd_buffer {
void (*callback) (struct qeth_channel *, struct qeth_cmd_buffer *);
};
static inline struct qeth_ipa_cmd *__ipa_cmd(struct qeth_cmd_buffer *iob)
{
return (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
}
/**
* definition of a qeth channel, used for read and write
*/
@ -846,7 +851,7 @@ struct qeth_trap_id {
*/
static inline int qeth_get_elements_for_range(addr_t start, addr_t end)
{
return PFN_UP(end - 1) - PFN_DOWN(start);
return PFN_UP(end) - PFN_DOWN(start);
}
static inline int qeth_get_micros(void)

14
drivers/s390/net/qeth_core_main.c
View file

@ -2120,7 +2120,7 @@ int qeth_send_control_data(struct qeth_card *card, int len,
unsigned long flags;
struct qeth_reply *reply = NULL;
unsigned long timeout, event_timeout;
struct qeth_ipa_cmd *cmd;
struct qeth_ipa_cmd *cmd = NULL;
QETH_CARD_TEXT(card, 2, "sendctl");
@ -2146,10 +2146,13 @@ int qeth_send_control_data(struct qeth_card *card, int len,
while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;
qeth_prepare_control_data(card, len, iob);
if (IS_IPA(iob->data))
if (IS_IPA(iob->data)) {
cmd = __ipa_cmd(iob);
event_timeout = QETH_IPA_TIMEOUT;
else
} else {
event_timeout = QETH_TIMEOUT;
}
timeout = jiffies + event_timeout;
QETH_CARD_TEXT(card, 6, "noirqpnd");
@ -2174,9 +2177,8 @@ int qeth_send_control_data(struct qeth_card *card, int len,
/* we have only one long running ipassist, since we can ensure
process context of this command we can sleep */
cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
if ((cmd->hdr.command == IPA_CMD_SETIP) &&
(cmd->hdr.prot_version == QETH_PROT_IPV4)) {
if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
cmd->hdr.prot_version == QETH_PROT_IPV4) {
if (!wait_event_timeout(reply->wait_q,
atomic_read(&reply->received), event_timeout))
goto time_err;