[SCSI] convert sd to scsi_execute_req (and update the scsi_execute_req API)
This one removes struct scsi_request entirely from sd. In the process,
I noticed we have no callers of scsi_wait_req who don't immediately
normalise the sense, so I updated the API to make it take a struct
scsi_sense_hdr instead of simply a big sense buffer.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 15c2039..611ccde 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -59,7 +59,6 @@
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
-#include <scsi/scsi_request.h>
#include <scsi/scsicam.h>
#include "scsi_logging.h"
@@ -125,7 +124,7 @@
static void sd_end_flush(request_queue_t *, struct request *);
static int sd_prepare_flush(request_queue_t *, struct request *);
static void sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer);
+ unsigned char *buffer);
static struct scsi_driver sd_template = {
.owner = THIS_MODULE,
@@ -682,19 +681,13 @@
static int sd_sync_cache(struct scsi_device *sdp)
{
- struct scsi_request *sreq;
int retries, res;
+ struct scsi_sense_hdr sshdr;
if (!scsi_device_online(sdp))
return -ENODEV;
- sreq = scsi_allocate_request(sdp, GFP_KERNEL);
- if (!sreq) {
- printk("FAILED\n No memory for request\n");
- return -ENOMEM;
- }
- sreq->sr_data_direction = DMA_NONE;
for (retries = 3; retries > 0; --retries) {
unsigned char cmd[10] = { 0 };
@@ -703,22 +696,20 @@
* Leave the rest of the command zero to indicate
* flush everything.
*/
- scsi_wait_req(sreq, cmd, NULL, 0, SD_TIMEOUT, SD_MAX_RETRIES);
- if (sreq->sr_result == 0)
+ res = scsi_execute_req(sdp, cmd, DMA_NONE, NULL, 0, &sshdr,
+ SD_TIMEOUT, SD_MAX_RETRIES);
+ if (res == 0)
break;
}
- res = sreq->sr_result;
- if (res) {
- printk(KERN_WARNING "FAILED\n status = %x, message = %02x, "
+ if (res) { printk(KERN_WARNING "FAILED\n status = %x, message = %02x, "
"host = %d, driver = %02x\n ",
status_byte(res), msg_byte(res),
host_byte(res), driver_byte(res));
if (driver_byte(res) & DRIVER_SENSE)
- scsi_print_req_sense("sd", sreq);
+ scsi_print_sense_hdr("sd", &sshdr);
}
- scsi_release_request(sreq);
return res;
}
@@ -957,22 +948,19 @@
scsi_io_completion(SCpnt, good_bytes, block_sectors << 9);
}
-static int media_not_present(struct scsi_disk *sdkp, struct scsi_request *srp)
+static int media_not_present(struct scsi_disk *sdkp,
+ struct scsi_sense_hdr *sshdr)
{
- struct scsi_sense_hdr sshdr;
- if (!srp->sr_result)
- return 0;
- if (!(driver_byte(srp->sr_result) & DRIVER_SENSE))
+ if (!scsi_sense_valid(sshdr))
return 0;
/* not invoked for commands that could return deferred errors */
- if (scsi_request_normalize_sense(srp, &sshdr)) {
- if (sshdr.sense_key != NOT_READY &&
- sshdr.sense_key != UNIT_ATTENTION)
- return 0;
- if (sshdr.asc != 0x3A) /* medium not present */
- return 0;
- }
+ if (sshdr->sense_key != NOT_READY &&
+ sshdr->sense_key != UNIT_ATTENTION)
+ return 0;
+ if (sshdr->asc != 0x3A) /* medium not present */
+ return 0;
+
set_media_not_present(sdkp);
return 1;
}
@@ -981,8 +969,8 @@
* spinup disk - called only in sd_revalidate_disk()
*/
static void
-sd_spinup_disk(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer) {
+sd_spinup_disk(struct scsi_disk *sdkp, char *diskname)
+{
unsigned char cmd[10];
unsigned long spintime_value = 0;
int retries, spintime;
@@ -1001,18 +989,13 @@
cmd[0] = TEST_UNIT_READY;
memset((void *) &cmd[1], 0, 9);
- SRpnt->sr_cmd_len = 0;
- memset(SRpnt->sr_sense_buffer, 0,
- SCSI_SENSE_BUFFERSIZE);
- SRpnt->sr_data_direction = DMA_NONE;
+ the_result = scsi_execute_req(sdkp->device, cmd,
+ DMA_NONE, NULL, 0,
+ &sshdr, SD_TIMEOUT,
+ SD_MAX_RETRIES);
- scsi_wait_req (SRpnt, (void *) cmd, (void *) buffer,
- 0/*512*/, SD_TIMEOUT, SD_MAX_RETRIES);
-
- the_result = SRpnt->sr_result;
if (the_result)
- sense_valid = scsi_request_normalize_sense(
- SRpnt, &sshdr);
+ sense_valid = scsi_sense_valid(&sshdr);
retries++;
} while (retries < 3 &&
(!scsi_status_is_good(the_result) ||
@@ -1024,7 +1007,7 @@
* any media in it, don't bother with any of the rest of
* this crap.
*/
- if (media_not_present(sdkp, SRpnt))
+ if (media_not_present(sdkp, &sshdr))
return;
if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
@@ -1063,14 +1046,9 @@
cmd[1] = 1; /* Return immediately */
memset((void *) &cmd[2], 0, 8);
cmd[4] = 1; /* Start spin cycle */
- SRpnt->sr_cmd_len = 0;
- memset(SRpnt->sr_sense_buffer, 0,
- SCSI_SENSE_BUFFERSIZE);
-
- SRpnt->sr_data_direction = DMA_NONE;
- scsi_wait_req(SRpnt, (void *)cmd,
- (void *) buffer, 0/*512*/,
- SD_TIMEOUT, SD_MAX_RETRIES);
+ scsi_execute_req(sdkp->device, cmd, DMA_NONE,
+ NULL, 0, &sshdr,
+ SD_TIMEOUT, SD_MAX_RETRIES);
spintime_value = jiffies;
}
spintime = 1;
@@ -1083,7 +1061,7 @@
if(!spintime) {
printk(KERN_NOTICE "%s: Unit Not Ready, "
"sense:\n", diskname);
- scsi_print_req_sense("", SRpnt);
+ scsi_print_sense_hdr("", &sshdr);
}
break;
}
@@ -1104,14 +1082,15 @@
*/
static void
sd_read_capacity(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer) {
+ unsigned char *buffer)
+{
unsigned char cmd[16];
- struct scsi_device *sdp = sdkp->device;
int the_result, retries;
int sector_size = 0;
int longrc = 0;
struct scsi_sense_hdr sshdr;
int sense_valid = 0;
+ struct scsi_device *sdp = sdkp->device;
repeat:
retries = 3;
@@ -1128,20 +1107,15 @@
memset((void *) buffer, 0, 8);
}
- SRpnt->sr_cmd_len = 0;
- memset(SRpnt->sr_sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
- SRpnt->sr_data_direction = DMA_FROM_DEVICE;
+ the_result = scsi_execute_req(sdp, cmd, DMA_FROM_DEVICE,
+ buffer, longrc ? 12 : 8, &sshdr,
+ SD_TIMEOUT, SD_MAX_RETRIES);
- scsi_wait_req(SRpnt, (void *) cmd, (void *) buffer,
- longrc ? 12 : 8, SD_TIMEOUT, SD_MAX_RETRIES);
-
- if (media_not_present(sdkp, SRpnt))
+ if (media_not_present(sdkp, &sshdr))
return;
- the_result = SRpnt->sr_result;
if (the_result)
- sense_valid = scsi_request_normalize_sense(SRpnt,
- &sshdr);
+ sense_valid = scsi_sense_valid(&sshdr);
retries--;
} while (the_result && retries);
@@ -1156,7 +1130,7 @@
driver_byte(the_result));
if (driver_byte(the_result) & DRIVER_SENSE)
- scsi_print_req_sense("sd", SRpnt);
+ scsi_print_sense_hdr("sd", &sshdr);
else
printk("%s : sense not available. \n", diskname);
@@ -1296,12 +1270,13 @@
/* called with buffer of length 512 */
static inline int
-sd_do_mode_sense(struct scsi_request *SRpnt, int dbd, int modepage,
- unsigned char *buffer, int len, struct scsi_mode_data *data)
+sd_do_mode_sense(struct scsi_device *sdp, int dbd, int modepage,
+ unsigned char *buffer, int len, struct scsi_mode_data *data,
+ struct scsi_sense_hdr *sshdr)
{
- return scsi_mode_sense(SRpnt->sr_device, dbd, modepage, buffer, len,
+ return scsi_mode_sense(sdp, dbd, modepage, buffer, len,
SD_TIMEOUT, SD_MAX_RETRIES, data,
- SRpnt->sr_sense_buffer);
+ sshdr);
}
/*
@@ -1310,25 +1285,27 @@
*/
static void
sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer) {
+ unsigned char *buffer)
+{
int res;
+ struct scsi_device *sdp = sdkp->device;
struct scsi_mode_data data;
set_disk_ro(sdkp->disk, 0);
- if (sdkp->device->skip_ms_page_3f) {
+ if (sdp->skip_ms_page_3f) {
printk(KERN_NOTICE "%s: assuming Write Enabled\n", diskname);
return;
}
- if (sdkp->device->use_192_bytes_for_3f) {
- res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 192, &data);
+ if (sdp->use_192_bytes_for_3f) {
+ res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 192, &data, NULL);
} else {
/*
* First attempt: ask for all pages (0x3F), but only 4 bytes.
* We have to start carefully: some devices hang if we ask
* for more than is available.
*/
- res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 4, &data);
+ res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 4, &data, NULL);
/*
* Second attempt: ask for page 0 When only page 0 is
@@ -1337,14 +1314,14 @@
* CDB.
*/
if (!scsi_status_is_good(res))
- res = sd_do_mode_sense(SRpnt, 0, 0, buffer, 4, &data);
+ res = sd_do_mode_sense(sdp, 0, 0, buffer, 4, &data, NULL);
/*
* Third attempt: ask 255 bytes, as we did earlier.
*/
if (!scsi_status_is_good(res))
- res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 255,
- &data);
+ res = sd_do_mode_sense(sdp, 0, 0x3F, buffer, 255,
+ &data, NULL);
}
if (!scsi_status_is_good(res)) {
@@ -1366,19 +1343,20 @@
*/
static void
sd_read_cache_type(struct scsi_disk *sdkp, char *diskname,
- struct scsi_request *SRpnt, unsigned char *buffer)
+ unsigned char *buffer)
{
int len = 0, res;
+ struct scsi_device *sdp = sdkp->device;
int dbd;
int modepage;
struct scsi_mode_data data;
struct scsi_sense_hdr sshdr;
- if (sdkp->device->skip_ms_page_8)
+ if (sdp->skip_ms_page_8)
goto defaults;
- if (sdkp->device->type == TYPE_RBC) {
+ if (sdp->type == TYPE_RBC) {
modepage = 6;
dbd = 8;
} else {
@@ -1387,7 +1365,7 @@
}
/* cautiously ask */
- res = sd_do_mode_sense(SRpnt, dbd, modepage, buffer, 4, &data);
+ res = sd_do_mode_sense(sdp, dbd, modepage, buffer, 4, &data, &sshdr);
if (!scsi_status_is_good(res))
goto bad_sense;
@@ -1408,7 +1386,7 @@
len += data.header_length + data.block_descriptor_length;
/* Get the data */
- res = sd_do_mode_sense(SRpnt, dbd, modepage, buffer, len, &data);
+ res = sd_do_mode_sense(sdp, dbd, modepage, buffer, len, &data, &sshdr);
if (scsi_status_is_good(res)) {
const char *types[] = {
@@ -1440,7 +1418,7 @@
}
bad_sense:
- if (scsi_request_normalize_sense(SRpnt, &sshdr) &&
+ if (scsi_sense_valid(&sshdr) &&
sshdr.sense_key == ILLEGAL_REQUEST &&
sshdr.asc == 0x24 && sshdr.ascq == 0x0)
printk(KERN_NOTICE "%s: cache data unavailable\n",
@@ -1465,7 +1443,6 @@
{
struct scsi_disk *sdkp = scsi_disk(disk);
struct scsi_device *sdp = sdkp->device;
- struct scsi_request *sreq;
unsigned char *buffer;
SCSI_LOG_HLQUEUE(3, printk("sd_revalidate_disk: disk=%s\n", disk->disk_name));
@@ -1477,18 +1454,11 @@
if (!scsi_device_online(sdp))
goto out;
- sreq = scsi_allocate_request(sdp, GFP_KERNEL);
- if (!sreq) {
- printk(KERN_WARNING "(sd_revalidate_disk:) Request allocation "
- "failure.\n");
- goto out;
- }
-
buffer = kmalloc(512, GFP_KERNEL | __GFP_DMA);
if (!buffer) {
printk(KERN_WARNING "(sd_revalidate_disk:) Memory allocation "
"failure.\n");
- goto out_release_request;
+ goto out;
}
/* defaults, until the device tells us otherwise */
@@ -1499,25 +1469,23 @@
sdkp->WCE = 0;
sdkp->RCD = 0;
- sd_spinup_disk(sdkp, disk->disk_name, sreq, buffer);
+ sd_spinup_disk(sdkp, disk->disk_name);
/*
* Without media there is no reason to ask; moreover, some devices
* react badly if we do.
*/
if (sdkp->media_present) {
- sd_read_capacity(sdkp, disk->disk_name, sreq, buffer);
+ sd_read_capacity(sdkp, disk->disk_name, buffer);
if (sdp->removable)
sd_read_write_protect_flag(sdkp, disk->disk_name,
- sreq, buffer);
- sd_read_cache_type(sdkp, disk->disk_name, sreq, buffer);
+ buffer);
+ sd_read_cache_type(sdkp, disk->disk_name, buffer);
}
set_capacity(disk, sdkp->capacity);
kfree(buffer);
- out_release_request:
- scsi_release_request(sreq);
out:
return 0;
}