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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  firewire: Add ref-counting for sbp2 orbs (fix command abortion)
  firewire: fix unloading of fw-ohci while devices are attached
  ieee1394: sbp2: fix sbp2_remove_device for error cases
This commit is contained in:
Linus Torvalds 2007-08-25 11:24:53 -07:00
parent 6ae26fa468 e57d2011a6
commit f2154eef2a
3 changed files with 51 additions and 18 deletions
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6
drivers/firewire/fw-card.c
View File

@ -510,9 +510,11 @@ fw_core_remove_card(struct fw_card *card)
/* Set up the dummy driver. */
card->driver = &dummy_driver;
fw_flush_transactions(card);
fw_destroy_nodes(card);
flush_scheduled_work();
fw_flush_transactions(card);
del_timer_sync(&card->flush_timer);
fw_card_put(card);
}

49
drivers/firewire/fw-sbp2.c
View File

@ -159,6 +159,7 @@ struct sbp2_pointer {
struct sbp2_orb {
struct fw_transaction t;
struct kref kref;
dma_addr_t request_bus;
int rcode;
struct sbp2_pointer pointer;
@ -279,6 +280,14 @@ static const struct {
}
};
static void
free_orb(struct kref *kref)
{
struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref);
kfree(orb);
}
static void
sbp2_status_write(struct fw_card *card, struct fw_request *request,
int tcode, int destination, int source,
@ -312,8 +321,8 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request,
spin_lock_irqsave(&card->lock, flags);
list_for_each_entry(orb, &sd->orb_list, link) {
if (STATUS_GET_ORB_HIGH(status) == 0 &&
STATUS_GET_ORB_LOW(status) == orb->request_bus &&
orb->rcode == RCODE_COMPLETE) {
STATUS_GET_ORB_LOW(status) == orb->request_bus) {
orb->rcode = RCODE_COMPLETE;
list_del(&orb->link);
break;
}
@ -325,6 +334,8 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request,
else
fw_error("status write for unknown orb\n");
kref_put(&orb->kref, free_orb);
fw_send_response(card, request, RCODE_COMPLETE);
}
@ -335,13 +346,27 @@ complete_transaction(struct fw_card *card, int rcode,
struct sbp2_orb *orb = data;
unsigned long flags;
orb->rcode = rcode;
if (rcode != RCODE_COMPLETE) {
spin_lock_irqsave(&card->lock, flags);
/*
* This is a little tricky. We can get the status write for
* the orb before we get this callback. The status write
* handler above will assume the orb pointer transaction was
* successful and set the rcode to RCODE_COMPLETE for the orb.
* So this callback only sets the rcode if it hasn't already
* been set and only does the cleanup if the transaction
* failed and we didn't already get a status write.
*/
spin_lock_irqsave(&card->lock, flags);
if (orb->rcode == -1)
orb->rcode = rcode;
if (orb->rcode != RCODE_COMPLETE) {
list_del(&orb->link);
spin_unlock_irqrestore(&card->lock, flags);
orb->callback(orb, NULL);
}
spin_unlock_irqrestore(&card->lock, flags);
kref_put(&orb->kref, free_orb);
}
static void
@ -360,6 +385,10 @@ 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);
/* Take a ref for the orb list and for the transaction callback. */
kref_get(&orb->kref);
kref_get(&orb->kref);
fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
node_id, generation, device->max_speed, offset,
&orb->pointer, sizeof(orb->pointer),
@ -416,6 +445,7 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
if (orb == NULL)
return -ENOMEM;
kref_init(&orb->base.kref);
orb->response_bus =
dma_map_single(device->card->device, &orb->response,
sizeof(orb->response), DMA_FROM_DEVICE);
@ -490,7 +520,7 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
if (response)
fw_memcpy_from_be32(response,
orb->response, sizeof(orb->response));
kfree(orb);
kref_put(&orb->base.kref, free_orb);
return retval;
}
@ -886,7 +916,6 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
orb->cmd->result = result;
orb->done(orb->cmd);
kfree(orb);
}
static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
@ -1005,6 +1034,7 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
/* Initialize rcode to something not RCODE_COMPLETE. */
orb->base.rcode = -1;
kref_init(&orb->base.kref);
orb->unit = unit;
orb->done = done;
@ -1051,10 +1081,11 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation,
sd->command_block_agent_address + SBP2_ORB_POINTER);
kref_put(&orb->base.kref, free_orb);
return 0;
fail_mapping:
kfree(orb);
kref_put(&orb->base.kref, free_orb);
fail_alloc:
return SCSI_MLQUEUE_HOST_BUSY;
}

14
drivers/ieee1394/sbp2.c
View File

@ -513,9 +513,9 @@ static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
return 0;
}
static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu)
static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu,
struct hpsb_host *host)
{
struct hpsb_host *host = lu->hi->host;
struct list_head *lh, *next;
struct sbp2_command_info *cmd;
unsigned long flags;
@ -922,15 +922,16 @@ static void sbp2_remove_device(struct sbp2_lu *lu)
if (!lu)
return;
hi = lu->hi;
if (!hi)
goto no_hi;
if (lu->shost) {
scsi_remove_host(lu->shost);
scsi_host_put(lu->shost);
}
flush_scheduled_work();
sbp2util_remove_command_orb_pool(lu);
sbp2util_remove_command_orb_pool(lu, hi->host);
list_del(&lu->lu_list);
@ -971,9 +972,8 @@ static void sbp2_remove_device(struct sbp2_lu *lu)
lu->ud->device.driver_data = NULL;
if (hi)
module_put(hi->host->driver->owner);
module_put(hi->host->driver->owner);
no_hi:
kfree(lu);
}