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usb: isp1760-hcd: convert to readl_poll_timeout_atomic()

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Use readl_poll_timeout_atomic() to simplify code

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1600668815-12135-7-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun
2020-09-21 14:13:31 +08:00
committed by Greg Kroah-Hartman
parent e7d8263bdd
commit 08305b45a4
1 changed files with 9 additions and 11 deletions
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20
drivers/usb/isp1760/isp1760-hcd.c
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@@ -22,6 +22,7 @@
#include <linux/debugfs.h> #include <linux/debugfs.h>
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/timer.h> #include <linux/timer.h>
#include <asm/unaligned.h> #include <asm/unaligned.h>
@@ -380,18 +381,15 @@ static int handshake(struct usb_hcd *hcd, u32 reg,
u32 mask, u32 done, int usec) u32 mask, u32 done, int usec)
{ {
u32 result; u32 result;
int ret;
do { ret = readl_poll_timeout_atomic(hcd->regs + reg, result,
result = reg_read32(hcd->regs, reg); ((result & mask) == done ||
if (result == ~0) result == U32_MAX), 1, usec);
return -ENODEV; if (result == U32_MAX)
result &= mask; return -ENODEV;
if (result == done)
return 0; return ret;
udelay(1);
usec--;
} while (usec > 0);
return -ETIMEDOUT;
} }
/* reset a non-running (STS_HALT == 1) controller */ /* reset a non-running (STS_HALT == 1) controller */