After a bus fault, capture and log the chip registers immediately,
if the NDEBUG_PSEUDO_DMA macro is defined. Remove some
printk(KERN_DEBUG ...) messages that aren't needed any more.
Don't skip the debug message when bytes == 0. Show all of the byte
counters in the debug messages.
Cc: stable@xxxxxxxxxxxxxxx # 5.15+
Tested-by: Stan Johnson <userm57@xxxxxxxxx>
Signed-off-by: Finn Thain <fthain@xxxxxxxxxxxxxx>
---
This is not really a bug fix, but has been sent to @stable because it is a
prerequisite for the bug fixes which follow.
---
drivers/scsi/mac_scsi.c | 42 +++++++++++++++++++++--------------------
1 file changed, 22 insertions(+), 20 deletions(-)
diff --git a/drivers/scsi/mac_scsi.c b/drivers/scsi/mac_scsi.c
index a402c4dc4645..5ae8f4a1e9ca 100644
--- a/drivers/scsi/mac_scsi.c
+++ b/drivers/scsi/mac_scsi.c
@@ -286,13 +286,14 @@ static inline int macscsi_pread(struct NCR5380_hostdata *hostdata,
while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
BASR_DRQ | BASR_PHASE_MATCH,
BASR_DRQ | BASR_PHASE_MATCH, 0)) {
- int bytes;
+ int bytes, chunk_bytes;
if (macintosh_config->ident == MAC_MODEL_IIFX)
write_ctrl_reg(hostdata, CTRL_HANDSHAKE_MODE |
CTRL_INTERRUPTS_ENABLE);
- bytes = mac_pdma_recv(s, d, min(hostdata->pdma_residual, 512));
+ chunk_bytes = min(hostdata->pdma_residual, 512);
+ bytes = mac_pdma_recv(s, d, chunk_bytes);
if (bytes > 0) {
d += bytes;
@@ -302,23 +303,23 @@ static inline int macscsi_pread(struct NCR5380_hostdata *hostdata,
if (hostdata->pdma_residual == 0)
goto out;
- if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ,
- BUS_AND_STATUS_REG, BASR_ACK,
- BASR_ACK, 0) < 0)
- scmd_printk(KERN_DEBUG, hostdata->connected,
- "%s: !REQ and !ACK\n", __func__);
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))
goto out;
if (bytes == 0)
udelay(MAC_PDMA_DELAY);
- if (bytes >= 0)
+ if (bytes > 0)
continue;
- dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,
- "%s: bus error (%d/%d)\n", __func__, d - dst, len);
NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);
+ dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,
+ "%s: bus error [%d/%d] (%d/%d)\n",
+ __func__, d - dst, len, bytes, chunk_bytes);
+
+ if (bytes == 0)
+ continue;
+
result = -1;
goto out;
}
@@ -345,13 +346,14 @@ static inline int macscsi_pwrite(struct NCR5380_hostdata *hostdata,
while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
BASR_DRQ | BASR_PHASE_MATCH,
BASR_DRQ | BASR_PHASE_MATCH, 0)) {
- int bytes;
+ int bytes, chunk_bytes;
if (macintosh_config->ident == MAC_MODEL_IIFX)
write_ctrl_reg(hostdata, CTRL_HANDSHAKE_MODE |
CTRL_INTERRUPTS_ENABLE);
- bytes = mac_pdma_send(s, d, min(hostdata->pdma_residual, 512));
+ chunk_bytes = min(hostdata->pdma_residual, 512);
+ bytes = mac_pdma_send(s, d, chunk_bytes);
if (bytes > 0) {
s += bytes;
@@ -370,23 +372,23 @@ static inline int macscsi_pwrite(struct NCR5380_hostdata *hostdata,
goto out;
}
- if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ,
- BUS_AND_STATUS_REG, BASR_ACK,
- BASR_ACK, 0) < 0)
- scmd_printk(KERN_DEBUG, hostdata->connected,
- "%s: !REQ and !ACK\n", __func__);
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))
goto out;
if (bytes == 0)
udelay(MAC_PDMA_DELAY);
- if (bytes >= 0)
+ if (bytes > 0)
continue;
- dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,
- "%s: bus error (%d/%d)\n", __func__, s - src, len);
NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);
+ dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,
+ "%s: bus error [%d/%d] (%d/%d)\n",
+ __func__, s - src, len, bytes, chunk_bytes);
+
+ if (bytes == 0)
+ continue;
+
result = -1;
goto out;
}
--
2.39.5
