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usb: early: ehci-dbgp: convert to readl_poll_timeout_atomic()

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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>
Link: https://lore.kernel.org/r/1600668815-12135-2-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 14:13:26 +08:00 committed by Greg Kroah-Hartman
parent 796eed4b23
commit 8f01cc875d
1 changed files with 5 additions and 10 deletions
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15
drivers/usb/early/ehci-dbgp.c
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@ -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;
int ret;
do {
ctrl = readl(&ehci_debug->control);
/* Stop when the transaction is finished */
if (ctrl & DBGP_DONE)
break;
udelay(1);
} while (--loop > 0);
if (!loop)
ret = readl_poll_timeout_atomic(&ehci_debug->control, ctrl,
(ctrl & DBGP_DONE), 1, DBGP_TIMEOUT);
if (ret)
return -DBGP_TIMEOUT;
/*