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Staging: sep: fix flow API 

We can return NULL - much cleaner

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2009-08-07 19:24:51 +01:00 committed by Greg Kroah-Hartman
parent 8c7ff81ac3
commit 3cacf72922
1 changed files with 28 additions and 38 deletions
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66
drivers/staging/sep/sep_driver.c
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@ -1751,36 +1751,29 @@ static void sep_deallocated_flow_tables(struct sep_lli_entry_t *first_table_ptr)
return;
}
/*
This function returns pointer to the flow data structure
that contains the given id
/**
* sep_find_flow_context - find a flow
* @sep: the SEP we are working with
* @flow_id: flow identifier
*
* Returns a pointer the matching flow, or NULL if the flow does not
* exist.
*/
FIXME: Daft API
*/
static int sep_find_flow_context(struct sep_device *sep,
unsigned long flow_id,
struct sep_flow_context_t **flow_data_ptr)
static struct sep_flow_context_t *sep_find_flow_context(struct sep_device *sep,
unsigned long flow_id)
{
unsigned long count;
int error = 0;
int count;
/*
always search for flow with id default first - in case we
already started working on the flow there can be no situation
when 2 flows are with default flag
* always search for flow with id default first - in case we
* already started working on the flow there can be no situation
* when 2 flows are with default flag
*/
for (count = 0; count < SEP_DRIVER_NUM_FLOWS; count++) {
if (sep->flows[count].flow_id == flow_id) {
*flow_data_ptr = &sep->flows[count];
break;
}
if (sep->flows[count].flow_id == flow_id)
return &sep->flows[count];
}
if (count == SEP_DRIVER_NUM_FLOWS)
/* no flow found */
error = -ENOMEM;
return error;
return NULL;
}
@ -1808,8 +1801,8 @@ static int sep_create_flow_dma_tables_handler(struct sep_device *sep,
first_table_data.physical_address = 0xffffffff;
/* find the free structure for flow data */
error = sep_find_flow_context(sep, SEP_FREE_FLOW_ID, &flow_context_ptr);
if (error)
flow_context_ptr = sep_find_flow_context(sep, SEP_FREE_FLOW_ID);
if (flow_context_ptr == NULL)
goto end_function;
error = copy_from_user(&command_args, (void *) arg, sizeof(struct sep_driver_build_flow_table_t));
@ -1879,8 +1872,8 @@ static int sep_add_flow_tables_handler(struct sep_device *sep, unsigned long arg
goto end_function;
/* find the flow structure for the flow id */
error = sep_find_flow_context(sep, command_args.flow_id, &flow_context_ptr);
if (error)
flow_context_ptr = sep_find_flow_context(sep, command_args.flow_id);
if (flow_context_ptr == NULL)
goto end_function;
/* prepare the flow dma tables */
@ -1977,8 +1970,8 @@ static int sep_add_flow_tables_message_handler(struct sep_device *sep, unsigned
}
/* find the flow context */
error = sep_find_flow_context(sep, command_args.flow_id, &flow_context_ptr);
if (error)
flow_context_ptr = sep_find_flow_context(sep, command_args.flow_id);
if (flow_context_ptr == NULL)
goto end_function;
/* copy the message into context */
@ -2241,8 +2234,8 @@ static int sep_set_flow_id_handler(struct sep_device *sep, unsigned long arg)
/* find the flow data structure that was just used for creating new flow
- its id should be default */
error = sep_find_flow_context(sep, SEP_TEMP_FLOW_ID, &flow_data_ptr);
if (error)
flow_data_ptr = sep_find_flow_context(sep, SEP_TEMP_FLOW_ID);
if (flow_data_ptr == NULL)
goto end_function;
/* set flow id */
@ -2387,7 +2380,6 @@ static void sep_flow_done_handler(struct work_struct *work)
static irqreturn_t sep_inthandler(int irq, void *dev_id)
{
irqreturn_t int_error;
unsigned long error;
unsigned long reg_val;
unsigned long flow_id;
struct sep_flow_context_t *flow_context_ptr;
@ -2405,13 +2397,12 @@ static irqreturn_t sep_inthandler(int irq, void *dev_id)
flow_id = sep_read_reg(sep, HW_HOST_IRR_REG_ADDR);
/* find the contex of the flow */
error = sep_find_flow_context(sep, flow_id >> 28, &flow_context_ptr);
if (error)
flow_context_ptr = sep_find_flow_context(sep, flow_id >> 28);
if (flow_context_ptr == NULL)
goto end_function_with_error;
INIT_WORK(&flow_context_ptr->flow_wq, sep_flow_done_handler);
/* queue the work */
INIT_WORK(&flow_context_ptr->flow_wq, sep_flow_done_handler);
queue_work(sep->flow_wq, &flow_context_ptr->flow_wq);
} else {
@ -2419,7 +2410,6 @@ static irqreturn_t sep_inthandler(int irq, void *dev_id)
if (reg_val & (0x1 << 13)) {
/* update the counter of reply messages */
sep->reply_ct++;
/* wake up the waiting process */
wake_up(&sep_event);
} else {