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Subject[PATCH v3 02/11] usb: early: ehci-dbgp: convert to readl_poll_timeout_atomic()
Date
Use readl_poll_timeout_atomic() to simplify code

Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v2~v3: no changes
---
drivers/usb/early/ehci-dbgp.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c
index b075dbf..45b42d8 100644
--- a/drivers/usb/early/ehci-dbgp.c
+++ b/drivers/usb/early/ehci-dbgp.c
@@ -15,6 +15,7 @@
#include <linux/console.h>
#include <linux/errno.h>
#include <linux/init.h>
+#include <linux/iopoll.h>
#include <linux/pci_regs.h>
#include <linux/pci_ids.h>
#include <linux/usb/ch9.h>
@@ -161,17 +162,11 @@ static inline u32 dbgp_pid_read_update(u32 x, u32 tok)
static int dbgp_wait_until_complete(void)
{
u32 ctrl;
- int loop = DBGP_TIMEOUT;
-
- do {
- ctrl = readl(&ehci_debug->control);
- /* Stop when the transaction is finished */
- if (ctrl & DBGP_DONE)
- break;
- udelay(1);
- } while (--loop > 0);
+ int ret;

- if (!loop)
+ ret = readl_poll_timeout_atomic(&ehci_debug->control, ctrl,
+ (ctrl & DBGP_DONE), 1, DBGP_TIMEOUT);
+ if (ret)
return -DBGP_TIMEOUT;

/*
--
1.9.1
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