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Subject[PATCH v3 05/11] usb: oxu210hp-hcd: convert to readl_poll_timeout_atomic()
Date
Use readl_poll_timeout_atomic() to simplify code

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v2~v3: no changes
---
drivers/usb/host/oxu210hp-hcd.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/host/oxu210hp-hcd.c b/drivers/usb/host/oxu210hp-hcd.c
index cfa7dd2..27dbbe1 100644
--- a/drivers/usb/host/oxu210hp-hcd.c
+++ b/drivers/usb/host/oxu210hp-hcd.c
@@ -24,6 +24,7 @@
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
+#include <linux/iopoll.h>

#include <asm/irq.h>
#include <asm/unaligned.h>
@@ -748,18 +749,16 @@ static int handshake(struct oxu_hcd *oxu, void __iomem *ptr,
u32 mask, u32 done, int usec)
{
u32 result;
+ int ret;

- do {
- result = readl(ptr);
- if (result == ~(u32)0) /* card removed */
- return -ENODEV;
- result &= mask;
- if (result == done)
- return 0;
- udelay(1);
- usec--;
- } while (usec > 0);
- return -ETIMEDOUT;
+ ret = readl_poll_timeout_atomic(ptr, result,
+ ((result & mask) == done ||
+ result == U32_MAX),
+ 1, usec);
+ if (result == U32_MAX) /* card removed */
+ return -ENODEV;
+
+ return ret;
}

/* Force HC to halt state from unknown (EHCI spec section 2.3) */
--
1.9.1
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