diff options
Diffstat (limited to 'drivers/usb/host/fotg210-hcd.c')
| -rw-r--r-- | drivers/usb/host/fotg210-hcd.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c index 194df8282471..1d94fcfac2c2 100644 --- a/drivers/usb/host/fotg210-hcd.c +++ b/drivers/usb/host/fotg210-hcd.c @@ -32,6 +32,7 @@ #include <linux/uaccess.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/iopoll.h> #include <linux/clk.h> #include <asm/byteorder.h> @@ -883,18 +884,15 @@ static int handshake(struct fotg210_hcd *fotg210, void __iomem *ptr, u32 mask, u32 done, int usec) { u32 result; + int ret; - do { - result = fotg210_readl(fotg210, ptr); - if (result == ~(u32)0) /* card removed */ - 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) /* card removed */ + return -ENODEV; + + return ret; } /* Force HC to halt state from unknown (EHCI spec section 2.3). |