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