diff options
| author | Colin Ian King <colin.king@canonical.com> | 2012-07-30 16:06:42 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-09 08:23:14 -0700 |
| commit | df665bff98f8b26731343193dd741c458455b57b (patch) | |
| tree | b45dce545f22d05ff05645ee1ca9fd97b72b884b | |
| parent | df4322f2f1310a7269df9841bfcee6274981a19f (diff) | |
USB: echi-dbgp: increase the controller wait time to come out of halt.
commit f96a4216e85050c0a9d41a41ecb0ae9d8e39b509 upstream.
The default 10 microsecond delay for the controller to come out of
halt in dbgp_ehci_startup is too short, so increase it to 1 millisecond.
This is based on emperical testing on various USB debug ports on
modern machines such as a Lenovo X220i and an Ivybridge development
platform that needed to wait ~450-950 microseconds.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/early/ehci-dbgp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c index 1fc8f1249806..347bb058e1ee 100644 --- a/drivers/usb/early/ehci-dbgp.c +++ b/drivers/usb/early/ehci-dbgp.c @@ -450,7 +450,7 @@ static int dbgp_ehci_startup(void) writel(FLAG_CF, &ehci_regs->configured_flag); /* Wait until the controller is no longer halted */ - loop = 10; + loop = 1000; do { status = readl(&ehci_regs->status); if (!(status & STS_HALT)) |