Hi Peter,
On 10/20/2016 05:08 PM, Peter Zijlstra wrote:
> On Thu, Oct 20, 2016 at 10:41:32AM +0200, Peter Zijlstra wrote:
>> I'm already only using early_printk() because regular printk() is an
>> unfixable piece of crap, and now you're making early_printk() useless
>> too.
> Note that the
On Thu, Oct 20, 2016 at 10:41:32AM +0200, Peter Zijlstra wrote:
> I'm already only using early_printk() because regular printk() is an
> unfixable piece of crap, and now you're making early_printk() useless
> too.
Note that the existing USB debug port stuff doesn't seem to have a
single lock in.
On Thu, Oct 20, 2016 at 04:08:17PM +0800, Lu Baolu wrote:
> Hi Peter,
>
> Thanks for your comments.
>
> On 10/19/2016 09:09 PM, Peter Zijlstra wrote:
> > On Wed, Oct 19, 2016 at 08:18:22AM +0800, Lu Baolu wrote:
> >> +++ b/drivers/usb/early/xhci-dbc.c
> >> +static int xdbc_bulk_write(const char
Hi Peter,
Thanks for your comments.
On 10/19/2016 09:09 PM, Peter Zijlstra wrote:
> On Wed, Oct 19, 2016 at 08:18:22AM +0800, Lu Baolu wrote:
>> +++ b/drivers/usb/early/xhci-dbc.c
>> +static int xdbc_bulk_write(const char *bytes, int size)
>> +{
>> +unsigned long flags;
>> +int ret,
On Wed, Oct 19, 2016 at 08:18:22AM +0800, Lu Baolu wrote:
> +++ b/drivers/usb/early/xhci-dbc.c
> +static int xdbc_bulk_write(const char *bytes, int size)
> +{
> + unsigned long flags;
> + int ret, timeout = 0;
> +
> + spin_lock_irqsave(, flags);
Yikes!!
So how is this supposed to
xHCI debug capability (DbC) is an optional but standalone
functionality provided by an xHCI host controller. Software
learns this capability by walking through the extended
capability list of the host. xHCI specification describes
DbC in section 7.6.
This patch introduces the code to probe and
