ping? Can anybody take a look at this patch? Thanks, Marcos On Tue, Jun 11, 2019 at 11:08:28PM -0300, Marcos Paulo de Souza wrote: > WWID composed from VPD data from device, specifically page 0x83. So, > when a device does not have VPD support, for example USB storage devices > where VPD is specifically disabled, a read into <blk device>/device/wwid > file will always return ENXIO. To avoid this, change the > scsi_sdev_attr_is_visible function to hide wwid sysfs file when the > devices does not support VPD. > > Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@xxxxxxxxx> > --- > drivers/scsi/scsi_sysfs.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c > index dbb206c90ecf..bfd890fa0c69 100644 > --- a/drivers/scsi/scsi_sysfs.c > +++ b/drivers/scsi/scsi_sysfs.c > @@ -1159,6 +1159,9 @@ static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, > struct device *dev = container_of(kobj, struct device, kobj); > struct scsi_device *sdev = to_scsi_device(dev); > > + /* do not present wwid if the device does not support VPD */ > + if (attr == &dev_attr_wwid.attr && sdev->skip_vpd_pages) > + return 0; > > if (attr == &dev_attr_queue_depth.attr && > !sdev->host->hostt->change_queue_depth) > -- > 2.21.0 >
