[PATCH v3 07/11] usb: isp1760-hcd: convert to readl_poll_timeout_atomic()
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
Date: 2020-08-22 08:09:47
Also in:
linux-mediatek, linux-usb, lkml
Subsystem:
the rest, usb isp1760 driver, usb subsystem · Maintainers:
Linus Torvalds, Rui Miguel Silva, Greg Kroah-Hartman
Use readl_poll_timeout_atomic() to simplify code Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- v2~v3: no changes --- drivers/usb/isp1760/isp1760-hcd.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c
index dd74ab7a..33ae656 100644
--- a/drivers/usb/isp1760/isp1760-hcd.c
+++ b/drivers/usb/isp1760/isp1760-hcd.c@@ -22,6 +22,7 @@ #include <linux/debugfs.h> #include <linux/uaccess.h> #include <linux/io.h> +#include <linux/iopoll.h> #include <linux/mm.h> #include <linux/timer.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 result; + int ret; + + ret = readl_poll_timeout_atomic(hcd->regs + reg, result, + ((result & mask) == done || + result == U32_MAX), 1, usec); + if (result == U32_MAX) + return -ENODEV; - do { - result = reg_read32(hcd->regs, reg); - if (result == ~0) - return -ENODEV; - result &= mask; - if (result == done) - return 0; - udelay(1); - usec--; - } while (usec > 0); - return -ETIMEDOUT; + return ret; } /* reset a non-running (STS_HALT == 1) controller */
--
1.9.1
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