lkml.org 
[lkml]   [2020]   [Aug]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 01/11] usb: early: convert to readl_poll_timeout_atomic()
Date
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>
---
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
\
 
 \ /
  Last update: 2020-08-22 10:10    [W:0.137 / U:5.948 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site