On Fri, Jul 20, 2018 at 02:16:33PM +0000, Adam Thomson wrote: > On 20 July 2018 14:59, Greg Kroah-Hartman wrote: > > > On Tue, Jul 17, 2018 at 03:36:19PM +0100, Adam Thomson wrote: > > > There is a bug in the sink PDO search code when trying to select > > > a PPS APDO. The current code actually sets the starting index for > > > searching to whatever value 'i' is, rather than choosing index 1 > > > to avoid the first PDO (always 5V fixed). As a result, for sources > > > which support PPS but whose PPS APDO index does not match with the > > > supporting sink PPS APDO index for the platform, no valid PPS APDO > > > will be found so this feature will not be permitted. > > > > > > Sadly in testing, both Source and Sink capabilities matched up and > > > this was missed. Code is now updated to correctly set the start > > > index to 1, and testing with additional PPS capable sources show > > > this to work as expected. > > > > > > Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@xxxxxxxxxxx> > > > --- > > > drivers/usb/typec/tcpm.c | 2 +- > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c > > > index 74e0cda..4f1f421 100644 > > > --- a/drivers/usb/typec/tcpm.c > > > +++ b/drivers/usb/typec/tcpm.c > > > @@ -2238,7 +2238,7 @@ static unsigned int tcpm_pd_select_pps_apdo(struct > > tcpm_port *port) > > > * PPS APDO. Again skip the first sink PDO as this will > > > * always be 5V 3A. > > > */ > > > - for (j = i; j < port->nr_snk_pdo; j++) { > > > + for (j = 1; j < port->nr_snk_pdo; j++) { > > > pdo = port->snk_pdo[j]; > > > > > > switch (pdo_type(pdo)) { > > > > What commit id does this "fix"? > > > > Does it need to go into 4.18-final? To the stable kernels? > > Sorry, missed that info. This fixes commit: > > 2eadc33f40d4c59dd0649f8b6958872d85ad05d7 > 'typec: tcpm: Add core support for sink side PPS' > > This patch only went into v4.18-rc1 so should only be targeted for v4.18-final. > > Do you want me to resend with this information added? It's ok, this time, I'll go hand-edit it... greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html