From: Felipe Balbi <balbi@ti.com>
Date: Fri, 27 Feb 2015 19:22:27 +0000 (-0600)
Subject: usb: musb: cppi41: do not call udelay()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=043f5b75dd2b1fbd45d5f367d50e5ae5b4afa955;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

usb: musb: cppi41: do not call udelay()

according to comment in code, HS completion
will happen pretty fast, instead of using
udelay(), let's just busy loop and drop a
cpu_relax() where udelay() was.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index 4407f30d0b86..9dc45a4a9fa8 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -287,7 +287,7 @@ static void cppi41_dma_callback(void *private_data)
 			wait--;
 			if (!wait)
 				break;
-			udelay(1);
+			cpu_relax();
 		} while (1);
 	}
 	list_add_tail(&cppi41_channel->tx_check,