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    Subject[PATCH v2 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: 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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