The wd33c93 needs a small delay before a new command can be started.
Signed-off-by: Roman Zippel <[email protected]>
---
drivers/scsi/wd33c93.c | 4 ++++
1 file changed, 4 insertions(+)
Index: linux-2.6-mm/drivers/scsi/wd33c93.c
===================================================================
--- linux-2.6-mm.orig/drivers/scsi/wd33c93.c
+++ linux-2.6-mm/drivers/scsi/wd33c93.c
@@ -939,6 +939,7 @@ wd33c93_intr(struct Scsi_Host *instance)
DB(DB_INTR, printk("%02x", cmd->SCp.Status))
if (hostdata->level2 >= L2_BASIC) {
sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */
+ udelay(7);
hostdata->state = S_RUNNING_LEVEL2;
write_wd33c93(regs, WD_COMMAND_PHASE, 0x50);
write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
@@ -955,6 +956,7 @@ wd33c93_intr(struct Scsi_Host *instance)
msg = read_1_byte(regs);
sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */
+ udelay(7);
hostdata->incoming_msg[hostdata->incoming_ptr] = msg;
if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE)
@@ -1358,6 +1360,7 @@ wd33c93_intr(struct Scsi_Host *instance)
} else {
/* Verify this is a change to MSG_IN and read the message */
sr = read_wd33c93(regs, WD_SCSI_STATUS);
+ udelay(7);
if (sr == (CSR_ABORT | PHS_MESS_IN) ||
sr == (CSR_UNEXP | PHS_MESS_IN) ||
sr == (CSR_SRV_REQ | PHS_MESS_IN)) {
@@ -1374,6 +1377,7 @@ wd33c93_intr(struct Scsi_Host *instance)
asr);
}
sr = read_wd33c93(regs, WD_SCSI_STATUS);
+ udelay(7);
if (sr != CSR_MSGIN)
printk
("wd33c93: Not paused with ACK on RESEL (%02x)\n",
--
-
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