From: Moritz Fischer <moritz.fischer@ettus.com>
Date: Mon, 16 Jan 2017 17:50:45 +0000 (-0800)
Subject: i2c: i2c-cdns: Reorder timeout loop for interrupt waiting
X-Git-Tag: v2017.03-rc1~94^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0ec0c5864365f3f222e1652aca98cfbd86bae890;p=platform%2Fkernel%2Fu-boot.git

i2c: i2c-cdns: Reorder timeout loop for interrupt waiting

Reorder the timeout loop such that we first check if the
condition is already true, and then call udelay() so if
the condition is already true, break early.

Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: u-boot@lists.denx.de
---

diff --git a/drivers/i2c/i2c-cdns.c b/drivers/i2c/i2c-cdns.c
index c1d6427..1c9fda8 100644
--- a/drivers/i2c/i2c-cdns.c
+++ b/drivers/i2c/i2c-cdns.c
@@ -130,10 +130,10 @@ static u32 cdns_i2c_wait(struct cdns_i2c_regs *cdns_i2c, u32 mask)
 	int timeout, int_status;
 
 	for (timeout = 0; timeout < 100; timeout++) {
-		udelay(100);
 		int_status = readl(&cdns_i2c->interrupt_status);
 		if (int_status & mask)
 			break;
+		udelay(100);
 	}
 
 	/* Clear interrupt status flags */