Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
[SCSI] scsi_transport_spi: fix domain validation failure from incorrect width setting
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 6f56f87..4df21c9 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -787,10 +787,12 @@
struct scsi_target *starget = sdev->sdev_target;
struct Scsi_Host *shost = sdev->host;
int len = sdev->inquiry_len;
+ int min_period = spi_min_period(starget);
+ int max_width = spi_max_width(starget);
/* first set us up for narrow async */
DV_SET(offset, 0);
DV_SET(width, 0);
-
+
if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS)
!= SPI_COMPARE_SUCCESS) {
starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n");
@@ -798,9 +800,13 @@
return;
}
+ if (!scsi_device_wide(sdev)) {
+ spi_max_width(starget) = 0;
+ max_width = 0;
+ }
+
/* test width */
- if (i->f->set_width && spi_max_width(starget) &&
- scsi_device_wide(sdev)) {
+ if (i->f->set_width && max_width) {
i->f->set_width(starget, 1);
if (spi_dv_device_compare_inquiry(sdev, buffer,
@@ -809,6 +815,11 @@
!= SPI_COMPARE_SUCCESS) {
starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n");
i->f->set_width(starget, 0);
+ /* Make sure we don't force wide back on by asking
+ * for a transfer period that requires it */
+ max_width = 0;
+ if (min_period < 10)
+ min_period = 10;
}
}
@@ -828,7 +839,8 @@
/* now set up to the maximum */
DV_SET(offset, spi_max_offset(starget));
- DV_SET(period, spi_min_period(starget));
+ DV_SET(period, min_period);
+
/* try QAS requests; this should be harmless to set if the
* target supports it */
if (scsi_device_qas(sdev)) {
@@ -837,14 +849,14 @@
DV_SET(qas, 0);
}
- if (scsi_device_ius(sdev) && spi_min_period(starget) < 9) {
+ if (scsi_device_ius(sdev) && min_period < 9) {
/* This u320 (or u640). Set IU transfers */
DV_SET(iu, 1);
/* Then set the optional parameters */
DV_SET(rd_strm, 1);
DV_SET(wr_flow, 1);
DV_SET(rti, 1);
- if (spi_min_period(starget) == 8)
+ if (min_period == 8)
DV_SET(pcomp_en, 1);
} else {
DV_SET(iu, 0);
@@ -862,6 +874,10 @@
} else {
DV_SET(dt, 1);
}
+ /* set width last because it will pull all the other
+ * parameters down to required values */
+ DV_SET(width, max_width);
+
/* Do the read only INQUIRY tests */
spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len,
spi_dv_device_compare_inquiry);