Hi Richard,
On Wed Jun 24 2020, Richard Cochran wrote:
> On Thu, Jun 18, 2020 at 08:40:23AM +0200, Kurt Kanzenbach wrote:
>
>> diff --git a/drivers/net/dsa/hirschmann/hellcreek.h
>> b/drivers/net/dsa/hirschmann/hellcreek.h
>> index a08a10cb5ab7..2d4422fd2567 100644
>> --- a/drivers/net/dsa/hirschmann/hellcreek.h
>> +++ b/drivers/net/dsa/hirschmann/hellcreek.h
>> @@ -234,10 +234,17 @@ struct hellcreek_fdb_entry {
>> struct hellcreek {
>> struct device *dev;
>> struct dsa_switch *ds;
>> + struct ptp_clock *ptp_clock;
>> + struct ptp_clock_info ptp_clock_info;
>> struct hellcreek_port ports[4];
>> + struct delayed_work overflow_work;
>> spinlock_t reg_lock; /* Switch IP register lock */
>> + spinlock_t ptp_lock; /* PTP IP register lock */
>
> Why use a spin lock and not a mutex?No particular reason. Mutex will also work. >> + hellcreek->ptp_clock = ptp_clock_register(&hellcreek->ptp_clock_info, >> + hellcreek->dev); >> + if (IS_ERR(hellcreek->ptp_clock)) >> + return PTR_ERR(hellcreek->ptp_clock); > > The ptp_clock_register() can also return NULL: > > * Returns a valid pointer on success or PTR_ERR on failure. If PHC > * support is missing at the configuration level, this function > * returns NULL, and drivers are expected to gracefully handle that > * case separately. > I see, thanks. I guess we could add the missing NULL checks to remove() and get_ts_info() to handle that case gracefully. Thanks, Kurt
signature.asc
Description: PGP signature
