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A few fixes that came around or after the merge window, except 

for cd2315d "ipmi: kcs_bmc: don't change device name" which is for a
 driver that very few people use, and those people need the change.
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Merge tag 'for-linus-4.19' of git://github.com/cminyard/linux-ipmi

Pull IPMI bugfixes from Corey Minyard:
 "A few fixes that came around or after the merge window, except for
  commit cd2315d471 ("ipmi: kcs_bmc: don't change device name") which
  is for a driver that very few people use, and those people need the
  change"

* tag 'for-linus-4.19' of git://github.com/cminyard/linux-ipmi:
  ipmi: Fix NULL pointer dereference in ssif_probe
  ipmi: Fix I2C client removal in the SSIF driver
  ipmi: Move BT capabilities detection to the detect call
  ipmi: Rework SMI registration failure
  ipmi: kcs_bmc: don't change device name
hifive-unleashed-5.1
Linus Torvalds 2018-09-12 19:33:56 -10:00
parent 7428b2e5d0 a8627cda7c
commit d3bd5973c7
5 changed files with 98 additions and 105 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

92
drivers/char/ipmi/ipmi_bt_sm.c
View File

@ -59,8 +59,6 @@ enum bt_states {
BT_STATE_RESET3,
BT_STATE_RESTART,
BT_STATE_PRINTME,
BT_STATE_CAPABILITIES_BEGIN,
BT_STATE_CAPABILITIES_END,
BT_STATE_LONG_BUSY /* BT doesn't get hosed :-) */
};
@ -86,7 +84,6 @@ struct si_sm_data {
int error_retries; /* end of "common" fields */
int nonzero_status; /* hung BMCs stay all 0 */
enum bt_states complete; /* to divert the state machine */
int BT_CAP_outreqs;
long BT_CAP_req2rsp;
int BT_CAP_retries; /* Recommended retries */
};
@ -137,8 +134,6 @@ static char *state2txt(unsigned char state)
case BT_STATE_RESET3: return("RESET3");
case BT_STATE_RESTART: return("RESTART");
case BT_STATE_LONG_BUSY: return("LONG_BUSY");
case BT_STATE_CAPABILITIES_BEGIN: return("CAP_BEGIN");
case BT_STATE_CAPABILITIES_END: return("CAP_END");
}
return("BAD STATE");
}
@ -185,7 +180,6 @@ static unsigned int bt_init_data(struct si_sm_data *bt, struct si_sm_io *io)
bt->complete = BT_STATE_IDLE; /* end here */
bt->BT_CAP_req2rsp = BT_NORMAL_TIMEOUT * USEC_PER_SEC;
bt->BT_CAP_retries = BT_NORMAL_RETRY_LIMIT;
/* BT_CAP_outreqs == zero is a flag to read BT Capabilities */
return 3; /* We claim 3 bytes of space; ought to check SPMI table */
}
@ -451,7 +445,7 @@ static enum si_sm_result error_recovery(struct si_sm_data *bt,
static enum si_sm_result bt_event(struct si_sm_data *bt, long time)
{
unsigned char status, BT_CAP[8];
unsigned char status;
static enum bt_states last_printed = BT_STATE_PRINTME;
int i;
@ -504,12 +498,6 @@ static enum si_sm_result bt_event(struct si_sm_data *bt, long time)
if (status & BT_H_BUSY) /* clear a leftover H_BUSY */
BT_CONTROL(BT_H_BUSY);
bt->timeout = bt->BT_CAP_req2rsp;
/* Read BT capabilities if it hasn't been done yet */
if (!bt->BT_CAP_outreqs)
BT_STATE_CHANGE(BT_STATE_CAPABILITIES_BEGIN,
SI_SM_CALL_WITHOUT_DELAY);
BT_SI_SM_RETURN(SI_SM_IDLE);
case BT_STATE_XACTION_START:
@ -614,37 +602,6 @@ static enum si_sm_result bt_event(struct si_sm_data *bt, long time)
BT_STATE_CHANGE(BT_STATE_XACTION_START,
SI_SM_CALL_WITH_DELAY);
/*
* Get BT Capabilities, using timing of upper level state machine.
* Set outreqs to prevent infinite loop on timeout.
*/
case BT_STATE_CAPABILITIES_BEGIN:
bt->BT_CAP_outreqs = 1;
{
unsigned char GetBT_CAP[] = { 0x18, 0x36 };
bt->state = BT_STATE_IDLE;
bt_start_transaction(bt, GetBT_CAP, sizeof(GetBT_CAP));
}
bt->complete = BT_STATE_CAPABILITIES_END;
BT_STATE_CHANGE(BT_STATE_XACTION_START,
SI_SM_CALL_WITH_DELAY);
case BT_STATE_CAPABILITIES_END:
i = bt_get_result(bt, BT_CAP, sizeof(BT_CAP));
bt_init_data(bt, bt->io);
if ((i == 8) && !BT_CAP[2]) {
bt->BT_CAP_outreqs = BT_CAP[3];
bt->BT_CAP_req2rsp = BT_CAP[6] * USEC_PER_SEC;
bt->BT_CAP_retries = BT_CAP[7];
} else
printk(KERN_WARNING "IPMI BT: using default values\n");
if (!bt->BT_CAP_outreqs)
bt->BT_CAP_outreqs = 1;
printk(KERN_WARNING "IPMI BT: req2rsp=%ld secs retries=%d\n",
bt->BT_CAP_req2rsp / USEC_PER_SEC, bt->BT_CAP_retries);
bt->timeout = bt->BT_CAP_req2rsp;
return SI_SM_CALL_WITHOUT_DELAY;
default: /* should never occur */
return error_recovery(bt,
status,
@ -655,6 +612,11 @@ static enum si_sm_result bt_event(struct si_sm_data *bt, long time)
static int bt_detect(struct si_sm_data *bt)
{
unsigned char GetBT_CAP[] = { 0x18, 0x36 };
unsigned char BT_CAP[8];
enum si_sm_result smi_result;
int rv;
/*
* It's impossible for the BT status and interrupt registers to be
* all 1's, (assuming a properly functioning, self-initialized BMC)
@ -665,6 +627,48 @@ static int bt_detect(struct si_sm_data *bt)
if ((BT_STATUS == 0xFF) && (BT_INTMASK_R == 0xFF))
return 1;
reset_flags(bt);
/*
* Try getting the BT capabilities here.
*/
rv = bt_start_transaction(bt, GetBT_CAP, sizeof(GetBT_CAP));
if (rv) {
dev_warn(bt->io->dev,
"Can't start capabilities transaction: %d\n", rv);
goto out_no_bt_cap;
}
smi_result = SI_SM_CALL_WITHOUT_DELAY;
for (;;) {
if (smi_result == SI_SM_CALL_WITH_DELAY ||
smi_result == SI_SM_CALL_WITH_TICK_DELAY) {
schedule_timeout_uninterruptible(1);
smi_result = bt_event(bt, jiffies_to_usecs(1));
} else if (smi_result == SI_SM_CALL_WITHOUT_DELAY) {
smi_result = bt_event(bt, 0);
} else
break;
}
rv = bt_get_result(bt, BT_CAP, sizeof(BT_CAP));
bt_init_data(bt, bt->io);
if (rv < 8) {
dev_warn(bt->io->dev, "bt cap response too short: %d\n", rv);
goto out_no_bt_cap;
}
if (BT_CAP[2]) {
dev_warn(bt->io->dev, "Error fetching bt cap: %x\n", BT_CAP[2]);
out_no_bt_cap:
dev_warn(bt->io->dev, "using default values\n");
} else {
bt->BT_CAP_req2rsp = BT_CAP[6] * USEC_PER_SEC;
bt->BT_CAP_retries = BT_CAP[7];
}
dev_info(bt->io->dev, "req2rsp=%ld secs retries=%d\n",
bt->BT_CAP_req2rsp / USEC_PER_SEC, bt->BT_CAP_retries);
return 0;
}

53
drivers/char/ipmi/ipmi_msghandler.c
View File

@ -3381,39 +3381,45 @@ int ipmi_register_smi(const struct ipmi_smi_handlers *handlers,
rv = handlers->start_processing(send_info, intf);
if (rv)
goto out;
goto out_err;
rv = __bmc_get_device_id(intf, NULL, &id, NULL, NULL, i);
if (rv) {
dev_err(si_dev, "Unable to get the device id: %d\n", rv);
goto out;
goto out_err_started;
}
mutex_lock(&intf->bmc_reg_mutex);
rv = __scan_channels(intf, &id);
mutex_unlock(&intf->bmc_reg_mutex);
if (rv)
goto out_err_bmc_reg;
out:
if (rv) {
ipmi_bmc_unregister(intf);
list_del_rcu(&intf->link);
mutex_unlock(&ipmi_interfaces_mutex);
synchronize_srcu(&ipmi_interfaces_srcu);
cleanup_srcu_struct(&intf->users_srcu);
kref_put(&intf->refcount, intf_free);
} else {
/*
* Keep memory order straight for RCU readers. Make
* sure everything else is committed to memory before
* setting intf_num to mark the interface valid.
*/
smp_wmb();
intf->intf_num = i;
mutex_unlock(&ipmi_interfaces_mutex);
/*
* Keep memory order straight for RCU readers. Make
* sure everything else is committed to memory before
* setting intf_num to mark the interface valid.
*/
smp_wmb();
intf->intf_num = i;
mutex_unlock(&ipmi_interfaces_mutex);
/* After this point the interface is legal to use. */
call_smi_watchers(i, intf->si_dev);
}
/* After this point the interface is legal to use. */
call_smi_watchers(i, intf->si_dev);
return 0;
out_err_bmc_reg:
ipmi_bmc_unregister(intf);
out_err_started:
if (intf->handlers->shutdown)
intf->handlers->shutdown(intf->send_info);
out_err:
list_del_rcu(&intf->link);
mutex_unlock(&ipmi_interfaces_mutex);
synchronize_srcu(&ipmi_interfaces_srcu);
cleanup_srcu_struct(&intf->users_srcu);
kref_put(&intf->refcount, intf_free);
return rv;
}
@ -3504,7 +3510,8 @@ void ipmi_unregister_smi(struct ipmi_smi *intf)
}
srcu_read_unlock(&intf->users_srcu, index);
intf->handlers->shutdown(intf->send_info);
if (intf->handlers->shutdown)
intf->handlers->shutdown(intf->send_info);
cleanup_smi_msgs(intf);

19
drivers/char/ipmi/ipmi_si_intf.c
View File

@ -2083,18 +2083,9 @@ static int try_smi_init(struct smi_info *new_smi)
si_to_str[new_smi->io.si_type]);
WARN_ON(new_smi->io.dev->init_name != NULL);
out_err:
kfree(init_name);
return 0;
out_err:
if (new_smi->intf) {
ipmi_unregister_smi(new_smi->intf);
new_smi->intf = NULL;
}
kfree(init_name);
return rv;
}
@ -2227,6 +2218,8 @@ static void shutdown_smi(void *send_info)
kfree(smi_info->si_sm);
smi_info->si_sm = NULL;
smi_info->intf = NULL;
}
/*
@ -2240,10 +2233,8 @@ static void cleanup_one_si(struct smi_info *smi_info)
list_del(&smi_info->link);
if (smi_info->intf) {
if (smi_info->intf)
ipmi_unregister_smi(smi_info->intf);
smi_info->intf = NULL;
}
if (smi_info->pdev) {
if (smi_info->pdev_registered)

32
drivers/char/ipmi/ipmi_ssif.c
View File

@ -181,6 +181,8 @@ struct ssif_addr_info {
struct device *dev;
struct i2c_client *client;
struct i2c_client *added_client;
struct mutex clients_mutex;
struct list_head clients;
@ -1214,18 +1216,11 @@ static void shutdown_ssif(void *send_info)
complete(&ssif_info->wake_thread);
kthread_stop(ssif_info->thread);
}
/*
* No message can be outstanding now, we have removed the
* upper layer and it permitted us to do so.
*/
kfree(ssif_info);
}
static int ssif_remove(struct i2c_client *client)
{
struct ssif_info *ssif_info = i2c_get_clientdata(client);
struct ipmi_smi *intf;
struct ssif_addr_info *addr_info;
if (!ssif_info)
@ -1235,9 +1230,7 @@ static int ssif_remove(struct i2c_client *client)
* After this point, we won't deliver anything asychronously
* to the message handler. We can unregister ourself.
*/
intf = ssif_info->intf;
ssif_info->intf = NULL;
ipmi_unregister_smi(intf);
ipmi_unregister_smi(ssif_info->intf);
list_for_each_entry(addr_info, &ssif_infos, link) {
if (addr_info->client == client) {
@ -1246,6 +1239,8 @@ static int ssif_remove(struct i2c_client *client)
}
}
kfree(ssif_info);
return 0;
}
@ -1648,15 +1643,9 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
out:
if (rv) {
/*
* Note that if addr_info->client is assigned, we
* leave it. The i2c client hangs around even if we
* return a failure here, and the failure here is not
* propagated back to the i2c code. This seems to be
* design intent, strange as it may be. But if we
* don't leave it, ssif_platform_remove will not remove
* the client like it should.
*/
if (addr_info)
addr_info->client = NULL;
dev_err(&client->dev, "Unable to start IPMI SSIF: %d\n", rv);
kfree(ssif_info);
}
@ -1676,7 +1665,8 @@ static int ssif_adapter_handler(struct device *adev, void *opaque)
if (adev->type != &i2c_adapter_type)
return 0;
i2c_new_device(to_i2c_adapter(adev), &addr_info->binfo);
addr_info->added_client = i2c_new_device(to_i2c_adapter(adev),
&addr_info->binfo);
if (!addr_info->adapter_name)
return 1; /* Only try the first I2C adapter by default. */
@ -1849,7 +1839,7 @@ static int ssif_platform_remove(struct platform_device *dev)
return 0;
mutex_lock(&ssif_infos_mutex);
i2c_unregister_device(addr_info->client);
i2c_unregister_device(addr_info->added_client);
list_del(&addr_info->link);
kfree(addr_info);

7
drivers/char/ipmi/kcs_bmc.c
View File

@ -16,6 +16,8 @@
#include "kcs_bmc.h"
#define DEVICE_NAME "ipmi-kcs"
#define KCS_MSG_BUFSIZ 1000
#define KCS_ZERO_DATA 0
@ -429,8 +431,6 @@ struct kcs_bmc *kcs_bmc_alloc(struct device *dev, int sizeof_priv, u32 channel)
if (!kcs_bmc)
return NULL;
dev_set_name(dev, "ipmi-kcs%u", channel);
spin_lock_init(&kcs_bmc->lock);
kcs_bmc->channel = channel;
@ -444,7 +444,8 @@ struct kcs_bmc *kcs_bmc_alloc(struct device *dev, int sizeof_priv, u32 channel)
return NULL;
kcs_bmc->miscdev.minor = MISC_DYNAMIC_MINOR;
kcs_bmc->miscdev.name = dev_name(dev);
kcs_bmc->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "%s%u",
DEVICE_NAME, channel);
kcs_bmc->miscdev.fops = &kcs_bmc_fops;
return kcs_bmc;