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| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2020-09-21 08:13:25 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-25 16:29:09 +0200 |
| commit | 796eed4b2342c9d6b26c958e92af91253a2390e1 (patch) | |
| tree | ae4bc2617910541225c6dc992d6da2ab7d30f53f /drivers | |
| parent | dt-bindings: usb: renesas,usbhs: Add r8a774e1 support (diff) | |
| download | linux-796eed4b2342c9d6b26c958e92af91253a2390e1.tar.xz linux-796eed4b2342c9d6b26c958e92af91253a2390e1.zip | |
usb: early: convert to readl_poll_timeout_atomic()
Use readl_poll_timeout_atomic() to simplify code
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
Reviewed-by: Jann Horn <jannh@google.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1600668815-12135-1-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/early/xhci-dbc.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index c0507767a8e3..be4ecbabdd58 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) |