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path: root/drivers/usb/storage/scsiglue.c
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Diffstat (limited to 'drivers/usb/storage/scsiglue.c')
-rw-r--r--drivers/usb/storage/scsiglue.c86
1 files changed, 41 insertions, 45 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 92f35abee92..866b5df36ed 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -78,6 +78,8 @@ static const char* host_info(struct Scsi_Host *host)
static int slave_alloc (struct scsi_device *sdev)
{
+ struct us_data *us = host_to_us(sdev->host);
+
/*
* Set the INQUIRY transfer length to 36. We don't use any of
* the extra data and many devices choke if asked for more or
@@ -102,6 +104,10 @@ static int slave_alloc (struct scsi_device *sdev)
*/
blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1));
+ /* Tell the SCSI layer if we know there is more than one LUN */
+ if (us->protocol == USB_PR_BULK && us->max_lun > 0)
+ sdev->sdev_bflags |= BLIST_FORCELUN;
+
return 0;
}
@@ -211,8 +217,11 @@ static int slave_configure(struct scsi_device *sdev)
/*
* Many devices do not respond properly to READ_CAPACITY_16.
* Tell the SCSI layer to try READ_CAPACITY_10 first.
+ * However some USB 3.0 drive enclosures return capacity
+ * modulo 2TB. Those must use READ_CAPACITY_16
*/
- sdev->try_rc_10_first = 1;
+ if (!(us->fflags & US_FL_NEEDS_CAP16))
+ sdev->try_rc_10_first = 1;
/* assume SPC3 or latter devices support sense size > 18 */
if (sdev->scsi_level > SCSI_SPC_2)
@@ -247,6 +256,10 @@ static int slave_configure(struct scsi_device *sdev)
if (us->fflags & US_FL_WRITE_CACHE)
sdev->wce_default_on = 1;
+ /* A few buggy USB-ATA bridges don't understand FUA */
+ if (us->fflags & US_FL_BROKEN_FUA)
+ sdev->broken_fua = 1;
+
} else {
/* Non-disk-type devices don't need to blacklist any pages
@@ -313,8 +326,6 @@ static int queuecommand_lck(struct scsi_cmnd *srb,
{
struct us_data *us = host_to_us(srb->device->host);
- US_DEBUGP("%s called\n", __func__);
-
/* check for state-transition errors */
if (us->srb != NULL) {
printk(KERN_ERR USB_STORAGE "Error in %s: us->srb = %p\n",
@@ -324,7 +335,7 @@ static int queuecommand_lck(struct scsi_cmnd *srb,
/* fail the command if we are disconnecting */
if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) {
- US_DEBUGP("Fail command during disconnect\n");
+ usb_stor_dbg(us, "Fail command during disconnect\n");
srb->result = DID_NO_CONNECT << 16;
done(srb);
return 0;
@@ -349,7 +360,7 @@ static int command_abort(struct scsi_cmnd *srb)
{
struct us_data *us = host_to_us(srb->device->host);
- US_DEBUGP("%s called\n", __func__);
+ usb_stor_dbg(us, "%s called\n", __func__);
/* us->srb together with the TIMED_OUT, RESETTING, and ABORTING
* bits are protected by the host lock. */
@@ -358,7 +369,7 @@ static int command_abort(struct scsi_cmnd *srb)
/* Is this command still active? */
if (us->srb != srb) {
scsi_unlock(us_to_host(us));
- US_DEBUGP ("-- nothing to abort\n");
+ usb_stor_dbg(us, "-- nothing to abort\n");
return FAILED;
}
@@ -386,7 +397,7 @@ static int device_reset(struct scsi_cmnd *srb)
struct us_data *us = host_to_us(srb->device->host);
int result;
- US_DEBUGP("%s called\n", __func__);
+ usb_stor_dbg(us, "%s called\n", __func__);
/* lock the device pointers and do the reset */
mutex_lock(&(us->dev_mutex));
@@ -402,7 +413,8 @@ static int bus_reset(struct scsi_cmnd *srb)
struct us_data *us = host_to_us(srb->device->host);
int result;
- US_DEBUGP("%s called\n", __func__);
+ usb_stor_dbg(us, "%s called\n", __func__);
+
result = usb_stor_port_reset(us);
return result < 0 ? FAILED : SUCCESS;
}
@@ -438,22 +450,21 @@ void usb_stor_report_bus_reset(struct us_data *us)
* /proc/scsi/ functions
***********************************************************************/
+static int write_info(struct Scsi_Host *host, char *buffer, int length)
+{
+ /* if someone is sending us data, just throw it away */
+ return length;
+}
+
/* we use this macro to help us write into the buffer */
#undef SPRINTF
-#define SPRINTF(args...) \
- do { if (pos < buffer+length) pos += sprintf(pos, ## args); } while (0)
+#define SPRINTF(args...) seq_printf(m, ## args)
-static int proc_info (struct Scsi_Host *host, char *buffer,
- char **start, off_t offset, int length, int inout)
+static int show_info (struct seq_file *m, struct Scsi_Host *host)
{
struct us_data *us = host_to_us(host);
- char *pos = buffer;
const char *string;
- /* if someone is sending us data, just throw it away */
- if (inout)
- return length;
-
/* print the controller name */
SPRINTF(" Host scsi%d: usb-storage\n", host->host_no);
@@ -483,28 +494,14 @@ static int proc_info (struct Scsi_Host *host, char *buffer,
SPRINTF(" Transport: %s\n", us->transport_name);
/* show the device flags */
- if (pos < buffer + length) {
- pos += sprintf(pos, " Quirks:");
+ SPRINTF(" Quirks:");
#define US_FLAG(name, value) \
- if (us->fflags & value) pos += sprintf(pos, " " #name);
+ if (us->fflags & value) seq_printf(m, " " #name);
US_DO_ALL_FLAGS
#undef US_FLAG
-
- *(pos++) = '\n';
- }
-
- /*
- * Calculate start of next buffer, and return value.
- */
- *start = buffer + offset;
-
- if ((pos - buffer) < offset)
- return (0);
- else if ((pos - buffer - offset) < length)
- return (pos - buffer - offset);
- else
- return (length);
+ seq_putc(m, '\n');
+ return 0;
}
/***********************************************************************
@@ -512,7 +509,7 @@ US_DO_ALL_FLAGS
***********************************************************************/
/* Output routine for the sysfs max_sectors file */
-static ssize_t show_max_sectors(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t max_sectors_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
@@ -520,7 +517,7 @@ static ssize_t show_max_sectors(struct device *dev, struct device_attribute *att
}
/* Input routine for the sysfs max_sectors file */
-static ssize_t store_max_sectors(struct device *dev, struct device_attribute *attr, const char *buf,
+static ssize_t max_sectors_store(struct device *dev, struct device_attribute *attr, const char *buf,
size_t count)
{
struct scsi_device *sdev = to_scsi_device(dev);
@@ -530,16 +527,14 @@ static ssize_t store_max_sectors(struct device *dev, struct device_attribute *at
blk_queue_max_hw_sectors(sdev->request_queue, ms);
return count;
}
- return -EINVAL;
+ return -EINVAL;
}
-
-static DEVICE_ATTR(max_sectors, S_IRUGO | S_IWUSR, show_max_sectors,
- store_max_sectors);
+static DEVICE_ATTR_RW(max_sectors);
static struct device_attribute *sysfs_device_attr_list[] = {
- &dev_attr_max_sectors,
- NULL,
- };
+ &dev_attr_max_sectors,
+ NULL,
+};
/*
* this defines our host template, with which we'll allocate hosts
@@ -549,7 +544,8 @@ struct scsi_host_template usb_stor_host_template = {
/* basic userland interface stuff */
.name = "usb-storage",
.proc_name = "usb-storage",
- .proc_info = proc_info,
+ .show_info = show_info,
+ .write_info = write_info,
.info = host_info,
/* command interface -- queued only */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 12:06:34 +0000