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nand/denali: use cpu_relax() while waiting for hardware interrupt

PATCH New Chuanxiao.Dong 1 participant 1 message Aug 12, 2010

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Memory technology devices (MTD) NAND flash
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PATCH 3/5 nand/denali: use cpu_relax() while waiting for hardware interrupt

From 4c0c46694b0d69e840295524bc8261e217ea0bf1 Mon Sep 17 00:00:00 2001
From: Chuanxiao Dong <[email protected]>
Date: Wed, 11 Aug 2010 17:53:29 +0800
Subject: [PATCH 3/5] nand/denali: use cpu_relax() while waiting for hardware interrupt

Signed-off-by Chuanxiao Dong <[email protected]>
---
 drivers/mtd/nand/denali.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
drivers/mtd/nand/denali.c +2 -2
index 975a893..5f7c8c8 100644
@@ -211,9 +211,9 @@ static uint16_t denali_nand_reset(struct denali_nand_info *denali)
 		iowrite32(device_reset_banks[i],
 				denali->flash_reg + DEVICE_RESET);
 		while (!(ioread32(denali->flash_reg +
-						intr_status_addresses[i]) &
+				intr_status_addresses[i]) &
 			(reset_complete[i] | operation_timeout[i])))
-			;
+			cpu_relax();
 		if (ioread32(denali->flash_reg + intr_status_addresses[i]) &
 			operation_timeout[i])
 			dev_dbg(&denali->dev->dev,
Signature · 1 line
1.6.6.1