Hi Greg,
On 2018/5/31 19:44, Greg Kroah-Hartman wrote:
> On Thu, May 31, 2018 at 07:11:08PM +0800, Yisheng Xie wrote:
>> match_string() returns the index of an array for a matching string,
>> which can be used instead of open coded variant.
>>
>> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
>> Cc: Quytelda Kahja <quytelda@xxxxxxxxxxx>
>> Cc: devel@xxxxxxxxxxxxxxxxxxxx
>> Signed-off-by: Yisheng Xie <xieyisheng1@xxxxxxxxxx>
>> ---
>> v2:
>> - const DRIVER_STRING instead - per Andy
>>
>> drivers/staging/gdm724x/gdm_tty.c | 18 +++++-------------
>> 1 file changed, 5 insertions(+), 13 deletions(-)
>>
>> diff --git a/drivers/staging/gdm724x/gdm_tty.c b/drivers/staging/gdm724x/gdm_tty.c
>> index 3cdebb8..397ecaa 100644
>> --- a/drivers/staging/gdm724x/gdm_tty.c
>> +++ b/drivers/staging/gdm724x/gdm_tty.c
>> @@ -43,7 +43,7 @@
>> static struct gdm *gdm_table[TTY_MAX_COUNT][GDM_TTY_MINOR];
>> static DEFINE_MUTEX(gdm_table_lock);
>>
>> -static char *DRIVER_STRING[TTY_MAX_COUNT] = {"GCTATC", "GCTDM"};
>> +static const char *DRIVER_STRING[TTY_MAX_COUNT] = {"GCTATC", "GCTDM"};
>> static char *DEVICE_STRING[TTY_MAX_COUNT] = {"GCT-ATC", "GCT-DM"};
>>
>> static void gdm_port_destruct(struct tty_port *port)
>> @@ -65,22 +65,14 @@ static int gdm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
>> {
>> struct gdm *gdm = NULL;
>> int ret;
>> - int i;
>> - int j;
>> -
>> - j = GDM_TTY_MINOR;
>> - for (i = 0; i < TTY_MAX_COUNT; i++) {
>> - if (!strcmp(tty->driver->driver_name, DRIVER_STRING[i])) {
>> - j = tty->index;
>> - break;
>> - }
>> - }
>>
>> - if (j == GDM_TTY_MINOR)
>> + ret = match_string(DRIVER_STRING, TTY_MAX_COUNT,
>> + tty->driver->driver_name);
>> + if (ret < 0 || tty->index == GDM_TTY_MINOR)
>> return -ENODEV;
>
> Very odd rewrite here. Why call this function if you think the initial
> parameters are not correct? Are you sure about your test for
> tty->index?
Hmm, actually, I thought it no need to test tty->index here, but I not so sure
about that so I kept it, I will remove this check next version.
>
> This should be cleaned up more please.
Sure!
Thanks
Yisheng
>
> thanks,
>
> greg k-h
>
> .
>
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