From: "Chuanxiao.Dong" <chuanxiao.dong@intel.com>
To: linux-mtd@lists.infradead.org, dwmw2@infradead.org
Subject: [PATCH v1 3/5]nand/denali: use cpu_relax() while waiting for hardware interrupt
Date: Thu, 12 Aug 2010 10:23:24 +0800 [thread overview]
Message-ID: <20100812022324.GC25657@intel.com> (raw)
From 4c0c46694b0d69e840295524bc8261e217ea0bf1 Mon Sep 17 00:00:00 2001
From: Chuanxiao Dong <chuanxiao.dong@intel.com>
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 <chuanxiao.dong@intel.com>
---
drivers/mtd/nand/denali.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index 975a893..5f7c8c8 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -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,
--
1.6.6.1
reply other threads:[~2010-08-12 2:26 UTC|newest]
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