提交 1d3d52c5 编写于 作者: K Kristian Høgsberg 提交者: Stefan Richter

firewire: fw-sbp2: Do ORB timeout right.

When a management ORB times out, either because the fw_transaction
times out or when we don't get the status write, we need to properly
cancel the entire operation.
Signed-off-by: NKristian Høgsberg <krh@redhat.com>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
上级 730c32f5
......@@ -24,6 +24,7 @@
#include <linux/device.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
#include <linux/timer.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
......@@ -58,12 +59,16 @@ struct sbp2_device {
int address_high;
int generation;
/* Timer for flushing ORBs. */
struct timer_list orb_timer;
struct work_struct work;
struct Scsi_Host *scsi_host;
};
#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
#define SBP2_MAX_SECTORS 255 /* Max sectors supported */
#define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */
#define SBP2_ORB_NULL 0x80000000
......@@ -327,6 +332,9 @@ sbp2_send_orb(struct sbp2_orb *orb, struct fw_unit *unit,
list_add_tail(&orb->link, &sd->orb_list);
spin_unlock_irqrestore(&device->card->lock, flags);
mod_timer(&sd->orb_timer,
jiffies + DIV_ROUND_UP(SBP2_ORB_TIMEOUT * HZ, 1000));
fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
node_id, generation,
device->node->max_speed, offset,
......@@ -356,6 +364,13 @@ static void sbp2_cancel_orbs(struct fw_unit *unit)
}
}
static void orb_timer_callback(unsigned long data)
{
struct sbp2_device *sd = (struct sbp2_device *)data;
sbp2_cancel_orbs(sd->unit);
}
static void
complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
{
......@@ -374,7 +389,6 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
struct fw_device *device = fw_device(unit->device.parent);
struct sbp2_device *sd = unit->device.driver_data;
struct sbp2_management_orb *orb;
unsigned long timeout;
int retval = -ENOMEM;
orb = kzalloc(sizeof *orb, GFP_ATOMIC);
......@@ -426,7 +440,7 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
sbp2_send_orb(&orb->base, unit,
node_id, generation, sd->management_agent_address);
timeout = wait_for_completion_timeout(&orb->done, 10 * HZ);
wait_for_completion(&orb->done);
/* FIXME: Handle bus reset race here. */
......@@ -437,7 +451,7 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
goto out;
}
if (timeout == 0) {
if (orb->base.rcode == RCODE_CANCELLED) {
fw_error("orb reply timed out, rcode=0x%02x\n",
orb->base.rcode);
goto out;
......@@ -516,6 +530,7 @@ static int sbp2_probe(struct device *dev)
unit->device.driver_data = sd;
sd->unit = unit;
INIT_LIST_HEAD(&sd->orb_list);
setup_timer(&sd->orb_timer, orb_timer_callback, (unsigned long)sd);
sd->address_handler.length = 0x100;
sd->address_handler.address_callback = sbp2_status_write;
......@@ -583,6 +598,7 @@ static int sbp2_probe(struct device *dev)
if (sbp2_send_management_orb(unit, node_id, generation,
SBP2_LOGIN_REQUEST, lun, &response) < 0) {
fw_core_remove_address_handler(&sd->address_handler);
del_timer_sync(&sd->orb_timer);
kfree(sd);
return -EBUSY;
}
......@@ -618,6 +634,7 @@ static int sbp2_probe(struct device *dev)
SBP2_LOGOUT_REQUEST, sd->login_id,
NULL);
fw_core_remove_address_handler(&sd->address_handler);
del_timer_sync(&sd->orb_timer);
kfree(sd);
return retval;
}
......@@ -634,6 +651,7 @@ static int sbp2_remove(struct device *dev)
SBP2_LOGOUT_REQUEST, sd->login_id, NULL);
remove_scsi_devices(unit);
del_timer_sync(&sd->orb_timer);
fw_core_remove_address_handler(&sd->address_handler);
kfree(sd);
......
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