diff options
| -rw-r--r-- | drivers/scsi/scsi_transport_spi.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c index 718a2bc4ed5..38a53b5f9e9 100644 --- a/drivers/scsi/scsi_transport_spi.c +++ b/drivers/scsi/scsi_transport_spi.c @@ -812,12 +812,10 @@ spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) if (!scsi_device_sync(sdev) && !scsi_device_dt(sdev)) return; - /* see if the device has an echo buffer. If it does we can - * do the SPI pattern write tests */ - - len = 0; - if (scsi_device_dt(sdev)) - len = spi_dv_device_get_echo_buffer(sdev, buffer); + /* len == -1 is the signal that we need to ascertain the + * presence of an echo buffer before trying to use it. len == + * 0 means we don't have an echo buffer */ + len = -1; retry: @@ -840,11 +838,23 @@ spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) if (spi_min_period(starget) == 8) DV_SET(pcomp_en, 1); } + /* Do the read only INQUIRY tests */ + spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len, + spi_dv_device_compare_inquiry); + /* See if we actually managed to negotiate and sustain DT */ + if (i->f->get_dt) + i->f->get_dt(starget); + + /* see if the device has an echo buffer. If it does we can do + * the SPI pattern write tests. Because of some broken + * devices, we *only* try this on a device that has actually + * negotiated DT */ + + if (len == -1 && spi_dt(starget)) + len = spi_dv_device_get_echo_buffer(sdev, buffer); - if (len == 0) { + if (len <= 0) { starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n"); - spi_dv_retrain(sdev, buffer, buffer + len, - spi_dv_device_compare_inquiry); return; } |