/**
* dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
* @dwc: pointer to our controller context structure
* @length: size of event buffer
*
* Returns 0 on success otherwise negative errno. In the error case, dwc
* may contain some buffers allocated but not all which were requested.
*/
static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
{
int num;
int i;
num = DWC3_NUM_INT(dwc->hwparams.hwparams1);
dwc->num_event_buffers = num;
dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num,
GFP_KERNEL);
if (!dwc->ev_buffs) {
dev_err(dwc->dev, "can't allocate event buffers array\n");
return -ENOMEM;
}
for (i = 0; i < num; i++) {
struct dwc3_event_buffer *evt;
evt = dwc3_alloc_one_event_buffer(dwc, length);
if (IS_ERR(evt)) {
dev_err(dwc->dev, "can't allocate event buffer\n");
return PTR_ERR(evt);
}
dwc->ev_buffs[i] = evt;
}
return 0;
}
/**
* dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
* @dwc: pointer to our controller context structure
* @length: size of event buffer
*
* Returns 0 on success otherwise negative errno. In the error case, dwc
* may contain some buffers allocated but not all which were requested.
*/
static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
{
int num;
int i;
num = DWC3_NUM_INT(dwc->hwparams.hwparams1);
dwc->num_event_buffers = num;
dwc->ev_buffs = kzalloc(sizeof(*dwc->ev_buffs) * num, GFP_KERNEL);
if (!dwc->ev_buffs) {
dev_err(dwc->dev, "can't allocate event buffers array\n");
return -ENOMEM;
}
for (i = 0; i < num; i++) {
struct dwc3_event_buffer *evt;
/*
* As SW workaround, allocate 8 bytes more than size of event
* buffer given to USB Controller to avoid possible memory
* corruption caused by event buffer overflow when Hw writes
* Vendor Device test event which could be of 12 bytes.
*/
evt = dwc3_alloc_one_event_buffer(dwc, (length + 8));
if (IS_ERR(evt)) {
dev_err(dwc->dev, "can't allocate event buffer\n");
return PTR_ERR(evt);
}
dwc->ev_buffs[i] = evt;
}
return 0;
}
