From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Felipe Balbi <balbi@kernel.org>,
Daniel Thompson <daniel.thompson@linaro.org>,
linux-usb@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Mathias Nyman <mathias.nyman@intel.com>,
Sumit Garg <sumit.garg@linaro.org>,
linux-kernel@vger.kernel.org, Jann Horn <jannh@google.com>,
Chuhong Yuan <hslester96@gmail.com>,
Douglas Anderson <dianders@chromium.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Saurav Girepunje <saurav.girepunje@gmail.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
Jason Yan <yanaijie@huawei.com>,
linux-mediatek@lists.infradead.org,
"Eric W. Biederman" <ebiederm@xmission.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Alan Stern <stern@rowland.harvard.edu>,
Lee Jones <lee.jones@linaro.org>,
Ben Dooks <ben.dooks@codethink.co.uk>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH RESEND v3 10/11] usb: udc: net2280: convert to readl_poll_timeout_atomic()
Date: Thu, 10 Sep 2020 16:21:51 +0800 [thread overview]
Message-ID: <1599726112-4439-10-git-send-email-chunfeng.yun@mediatek.com> (raw)
In-Reply-To: <1599726112-4439-1-git-send-email-chunfeng.yun@mediatek.com>
Use readl_poll_timeout_atomic() to simplify code
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
---
v3: no changes
v2: add Acked-by Alan
---
drivers/usb/gadget/udc/net2280.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index 7530bd9..f1a21f4 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -52,6 +52,7 @@
#include <linux/usb/gadget.h>
#include <linux/prefetch.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
@@ -360,18 +361,16 @@ static inline void enable_pciirqenb(struct net2280_ep *ep)
static int handshake(u32 __iomem *ptr, u32 mask, u32 done, int usec)
{
u32 result;
+ int ret;
- do {
- result = readl(ptr);
- if (result == ~(u32)0) /* "device unplugged" */
- 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) /* device unplugged */
+ return -ENODEV;
+
+ return ret;
}
static const struct usb_ep_ops net2280_ep_ops;
--
1.9.1
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next prev parent reply other threads:[~2020-09-10 8:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-10 8:21 [PATCH RESEND v3 01/11] usb: early: convert to readl_poll_timeout_atomic() Chunfeng Yun
2020-09-10 8:21 ` [PATCH RESEND v3 02/11] usb: early: ehci-dbgp: " Chunfeng Yun
2020-09-10 8:21 ` [PATCH RESEND v3 03/11] usb: pci-quirks: " Chunfeng Yun
2020-09-10 8:21 ` [PATCH RESEND v3 04/11] usb: xhci-rcar: " Chunfeng Yun
2020-09-10 12:56 ` Yoshihiro Shimoda
2020-09-11 2:21 ` Chunfeng Yun
2020-09-10 13:12 ` Daniel Thompson
2020-09-11 2:33 ` Chunfeng Yun
2020-09-11 3:13 ` Yoshihiro Shimoda
2020-09-11 4:12 ` Chunfeng Yun
2020-09-11 4:57 ` Yoshihiro Shimoda
2020-09-11 11:46 ` Chunfeng Yun
2020-09-11 8:34 ` Daniel Thompson
2020-09-11 9:27 ` Chunfeng Yun
2020-09-11 9:48 ` Daniel Thompson
2020-09-11 9:58 ` Yoshihiro Shimoda
2020-09-10 8:21 ` [PATCH RESEND v3 05/11] usb: oxu210hp-hcd: " Chunfeng Yun
2020-09-10 8:21 ` [PATCH RESEND v3 06/11] usb: fotg210-hcd: " Chunfeng Yun
2020-09-10 8:21 ` [PATCH RESEND v3 07/11] usb: isp1760-hcd: " Chunfeng Yun
2020-09-10 8:21 ` [PATCH RESEND v3 08/11] usb: phy-ulpi-viewport: " Chunfeng Yun
2020-09-10 8:21 ` [PATCH RESEND v3 09/11] usb: phy: phy-mv-usb: " Chunfeng Yun
2020-09-10 8:21 ` Chunfeng Yun [this message]
2020-09-10 8:21 ` [PATCH RESEND v3 11/11] iopoll: update kerneldoc of read_poll_timeout_atomic() Chunfeng Yun
2020-09-10 10:49 ` [PATCH RESEND v3 01/11] usb: early: convert to readl_poll_timeout_atomic() Jann Horn
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