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| author | Felipe Balbi <balbi@ti.com> | 2011-10-12 10:31:04 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2011-12-12 11:48:11 +0200 |
| commit | 9f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32 (patch) | |
| tree | a80c6f48a8f1c4fd70d0865b027035d3f8e0d44e /drivers/usb/dwc3/core.c | |
| parent | 6c167fc9b0c23ead791edb94cf4debb6b8e534b5 (diff) | |
| download | linux-9f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32.tar.gz linux-9f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32.tar.bz2 linux-9f622b2a407d8b34a5a7f5b4abd8b29b25cf4f32.zip | |
usb: dwc3: calculate number of event buffers dynamically
This will allow us to only allocate memory when
we actually need.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3/core.c')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index ca3b01f5fffa..1f67606fd4fb 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -154,7 +154,7 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc) struct dwc3_event_buffer *evt; int i; - for (i = 0; i < DWC3_EVENT_BUFFERS_NUM; i++) { + for (i = 0; i < dwc->num_event_buffers; i++) { evt = dwc->ev_buffs[i]; if (evt) { dwc3_free_one_event_buffer(dwc, evt); @@ -166,17 +166,19 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc) /** * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length * @dwc: Pointer to out controller context structure - * @num: number of event buffers to allocate * @length: size of event buffer * * Returns 0 on success otherwise negative errno. In error the case, dwc * may contain some buffers allocated but not all which were requested. */ -static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned num, - unsigned length) +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; + for (i = 0; i < num; i++) { struct dwc3_event_buffer *evt; @@ -202,7 +204,7 @@ static int __devinit dwc3_event_buffers_setup(struct dwc3 *dwc) struct dwc3_event_buffer *evt; int n; - for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) { + for (n = 0; n < dwc->num_event_buffers; n++) { evt = dwc->ev_buffs[n]; dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n", evt->buf, (unsigned long long) evt->dma, @@ -225,7 +227,7 @@ static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) struct dwc3_event_buffer *evt; int n; - for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) { + for (n = 0; n < dwc->num_event_buffers; n++) { evt = dwc->ev_buffs[n]; dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0); dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0); @@ -289,8 +291,9 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc) cpu_relax(); } while (true); - ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_NUM, - DWC3_EVENT_BUFFERS_SIZE); + dwc3_cache_hwparams(dwc); + + ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); if (ret) { dev_err(dwc->dev, "failed to allocate event buffers\n"); ret = -ENOMEM; @@ -303,8 +306,6 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc) goto err1; } - dwc3_cache_hwparams(dwc); - return 0; err1: |