From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Felipe Balbi <balbi@kernel.org>
Cc: Sumit Garg <sumit.garg@linaro.org>,
Daniel Thompson <daniel.thompson@linaro.org>,
linux-usb@vger.kernel.org,
Mathias Nyman <mathias.nyman@linux.intel.com>,
Arnd Bergmann <arnd@arndb.de>,
Mathias Nyman <mathias.nyman@intel.com>,
Jann Horn <jannh@google.com>, Jason Yan <yanaijie@huawei.com>,
Chuhong Yuan <hslester96@gmail.com>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
linux-kernel@vger.kernel.org,
Saurav Girepunje <saurav.girepunje@gmail.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
"Ben Dooks \(Codethink\)" <ben.dooks@codethink.co.uk>,
linux-mediatek@lists.infradead.org,
"Eric W. Biederman" <ebiederm@xmission.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Lee Jones <lee.jones@linaro.org>,
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
linux-arm-kernel@lists.infradead.org,
Lu Baolu <baolu.lu@linux.intel.com>
Subject: [PATCH v4 01/11] usb: early: convert to readl_poll_timeout_atomic()
Date: Mon, 21 Sep 2020 14:13:25 +0800 [thread overview]
Message-ID: <1600668815-12135-1-git-send-email-chunfeng.yun@mediatek.com> (raw)
Use readl_poll_timeout_atomic() to simplify code
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Jann Horn <jannh@google.com>
---
v4: add reviewed-by Jann
v2~v3: no changes
---
drivers/usb/early/xhci-dbc.c | 14 ++++----------
1 file changed, 4 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c
index c050776..be4ecba 100644
--- a/drivers/usb/early/xhci-dbc.c
+++ b/drivers/usb/early/xhci-dbc.c
@@ -14,6 +14,7 @@
#include <linux/pci_ids.h>
#include <linux/memblock.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <asm/pci-direct.h>
#include <asm/fixmap.h>
#include <linux/bcd.h>
@@ -135,16 +136,9 @@ static int handshake(void __iomem *ptr, u32 mask, u32 done, int wait, int delay)
{
u32 result;
- do {
- result = readl(ptr);
- result &= mask;
- if (result == done)
- return 0;
- udelay(delay);
- wait -= delay;
- } while (wait > 0);
-
- return -ETIMEDOUT;
+ return readl_poll_timeout_atomic(ptr, result,
+ ((result & mask) == done),
+ delay, wait);
}
static void __init xdbc_bios_handoff(void)
--
1.9.1
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next reply other threads:[~2020-09-21 6:26 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-21 6:13 Chunfeng Yun [this message]
2020-09-21 6:13 ` [PATCH v4 02/11] usb: early: ehci-dbgp: convert to readl_poll_timeout_atomic() Chunfeng Yun
2020-09-21 6:13 ` [PATCH v4 03/11] usb: pci-quirks: " Chunfeng Yun
2020-09-21 6:13 ` [PATCH v4 04/11] usb: xhci-rcar: " Chunfeng Yun
2020-09-23 8:47 ` Yoshihiro Shimoda
2020-09-23 8:53 ` Chunfeng Yun
2020-09-21 6:13 ` [PATCH v4 05/11] usb: oxu210hp-hcd: " Chunfeng Yun
2020-09-21 6:13 ` [PATCH v4 06/11] usb: fotg210-hcd: " Chunfeng Yun
2020-09-21 6:13 ` [PATCH v4 07/11] usb: isp1760-hcd: " Chunfeng Yun
2020-09-21 6:13 ` [PATCH v4 08/11] usb: phy-ulpi-viewport: " Chunfeng Yun
2020-09-21 6:13 ` [PATCH v4 09/11] usb: phy: phy-mv-usb: " Chunfeng Yun
2020-09-21 6:13 ` [PATCH v4 10/11] usb: udc: net2280: " Chunfeng Yun
2020-09-21 6:13 ` [PATCH v4 11/11] iopoll: update kerneldoc of read_poll_timeout_atomic() Chunfeng Yun
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