From: Felipe Balbi Date: Thu, 10 Mar 2016 12:40:31 +0000 (+0200) Subject: UPSTREAM: usb: dwc3: increase maximum number of TRBs per endpoint X-Git-Tag: firefly_0821_release~1878 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fc28417f8ade976522d5a2133a4e78121d40dcdd;p=firefly-linux-kernel-4.4.55.git UPSTREAM: usb: dwc3: increase maximum number of TRBs per endpoint previously we were using a maximum of 32 TRBs per endpoint. With each TRB being 16 bytes long, we were using 512 bytes of memory for each endpoint. However, SLAB/SLUB will always allocate PAGE_SIZE chunks. In order to better utilize the memory we allocate and to allow deeper queues for gadgets which would benefit from it (g_ether comes to mind), let's increase the maximum to 256 TRBs which rounds up to 4096 bytes for each endpoint. Change-Id: I2591378bfa8e9c98804d52a1862509c91c4b00f5 Signed-off-by: Felipe Balbi Signed-off-by: Wu Liang feng (cherry picked from commit 8495036e986bdc7e82523d47097e7833d2782ff9) --- diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index dc6536769276..c74310c7981e 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -436,7 +436,7 @@ struct dwc3_event_buffer { #define DWC3_EP_DIRECTION_TX true #define DWC3_EP_DIRECTION_RX false -#define DWC3_TRB_NUM 32 +#define DWC3_TRB_NUM 256 #define DWC3_TRB_MASK (DWC3_TRB_NUM - 1) /**