linux-kernel - Re: [PATCH V2 3/3] n_gsm: wake up ldisc tty before using it

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Date:	Wed, 27 May 2015 11:43:49 +0800
From:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	linux-kernel@...r.kernel.org, xinhuix.pan@...el.com,
	alan@...ux.intel.com
Subject: Re: [PATCH V2 3/3] n_gsm: wake up ldisc tty before using it

On 2015/5/27 11:02, Greg KH wrote:
> On Wed, May 27, 2015 at 10:50:01AM +0800, Zhang, Yanmin wrote:
>> Wake up ldisc device before calling its driver to access the device.
>>
>> Signed-off-by: Zhang Yanmin <yanmin.zhang@...el.com>
>>
>> ---
>>
>>  drivers/tty/n_gsm.c | 40 +++++++++++++++++++++++++++++++++++++++-
>>  1 file changed, 39 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
>> index 2c34c32..40671fa 100644
>> --- a/drivers/tty/n_gsm.c
>> +++ b/drivers/tty/n_gsm.c
>> @@ -62,6 +62,7 @@
>>  #include <linux/netdevice.h>
>>  #include <linux/etherdevice.h>
>>  #include <linux/gsmmux.h>
>> +#include <linux/pm_runtime.h>
>>  
>>  static int debug;
>>  module_param(debug, int, 0600);
>> @@ -555,6 +556,27 @@ static int gsm_stuff_frame(const u8 *input, u8 *output, int len)
>>      return olen;
>>  }
>>  
>> +static int pm_runtime_get_sync_tty(struct tty_struct *tty)
>> +{
>> +    int ret = 0;
>> +
>> +    /*Wakeup parent as tty itself doesn't enable runtime*/
> No spaces in your comment?
I will add it.

>
> Anyway, this is corrupted and can't be applied, please fix up your email
> client and try it again...
I check the patch by scripts/checkpatch.pl and everything seems good.

I use Thunderbird 31.7.0, the latest. It auto updates to the latest version. Perhaps some new
config options changed something.

It seems email client converts some tab to space automatically.

Yanmin

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