ieee1394: sbp2: add INQUIRY delay workaround

Add the same workaround as found in fw-sbp2 for feature parity and
compatibility of the workarounds module parameter.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jarod Wilson <jwilson@redhat.com>

diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 28e155a..accb2ad 100644 (file)
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -183,6 +183,9 @@ MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
  *   Avoids access beyond actual disk limits on devices with an off-by-one bug.
  *   Don't use this with devices which don't have this bug.
  *
+ * - delay inquiry
+ *   Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry.
+ *
  * - override internal blacklist
  *   Instead of adding to the built-in blacklist, use only the workarounds
  *   specified in the module load parameter.
@@ -195,6 +198,7 @@ MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
        ", 36 byte inquiry = "    __stringify(SBP2_WORKAROUND_INQUIRY_36)
        ", skip mode page 8 = "   __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
        ", fix capacity = "       __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
+       ", delay inquiry = "      __stringify(SBP2_WORKAROUND_DELAY_INQUIRY)
        ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
        ", or a combination)");
 
@@ -357,6 +361,11 @@ static const struct {
                .workarounds            = SBP2_WORKAROUND_INQUIRY_36 |
                                          SBP2_WORKAROUND_MODE_SENSE_8,
        },
+       /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
+               .firmware_revision      = 0x002800,
+               .model_id               = 0x000000,
+               .workarounds            = SBP2_WORKAROUND_DELAY_INQUIRY,
+       },
        /* Initio bridges, actually only needed for some older ones */ {
                .firmware_revision      = 0x000200,
                .model_id               = SBP2_ROM_VALUE_WILDCARD,
@@ -914,6 +923,9 @@ static int sbp2_start_device(struct sbp2_lu *lu)
        sbp2_agent_reset(lu, 1);
        sbp2_max_speed_and_size(lu);
 
+       if (lu->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
+               ssleep(SBP2_INQUIRY_DELAY);
+
        error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
        if (error) {
                SBP2_ERR("scsi_add_device failed");

diff --git a/drivers/ieee1394/sbp2.h b/drivers/ieee1394/sbp2.h
index d2ecb0d..80d8e09 100644 (file)
--- a/drivers/ieee1394/sbp2.h
+++ b/drivers/ieee1394/sbp2.h
@@ -343,6 +343,8 @@ enum sbp2lu_state_types {
 #define SBP2_WORKAROUND_INQUIRY_36     0x2
 #define SBP2_WORKAROUND_MODE_SENSE_8   0x4
 #define SBP2_WORKAROUND_FIX_CAPACITY   0x8
+#define SBP2_WORKAROUND_DELAY_INQUIRY  0x10
+#define SBP2_INQUIRY_DELAY             12
 #define SBP2_WORKAROUND_OVERRIDE       0x100
 
 #endif /* SBP2_H */