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authorJames Bottomley <James.Bottomley@steeleye.com>2005-09-10 12:44:09 -0500
committerJames Bottomley <jejb@mulgrave.(none)>2005-09-10 14:43:25 -0500
commit146f7262ee0ec7fc6882f06e5fcb13883308073c (patch)
treeccaea3545313046dce9e012f8db5ef57236e0f90
parentb70d37bf61f278f9d9adf17c52af6b2d0ae7800c (diff)
[SCSI] Alter the scsi_add_device() API to conform to what users expect
The original API returned either an ERR_PTR() or a refcounted sdev. Unfortunately, if it's successful, you need to do a scsi_device_put() on the sdev otherwise the refcounting is wrong. Everyone seems to expect that scsi_add_device() should be callable without doing the ref put, so alter the API so it is (we still have __scsi_add_device with the original behaviour). The only actual caller that needs altering is the one in firewire ... not because it gets this right, but because it acts on the error if one is returned. Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
-rw-r--r--drivers/ieee1394/sbp2.c8
-rw-r--r--drivers/scsi/scsi_scan.c13
-rw-r--r--include/scsi/scsi_device.h4
3 files changed, 19 insertions, 6 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 627af507643a..de88218ef7cc 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -790,7 +790,7 @@ static void sbp2_host_reset(struct hpsb_host *host)
static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
{
struct sbp2scsi_host_info *hi = scsi_id->hi;
- struct scsi_device *sdev;
+ int error;
SBP2_DEBUG("sbp2_start_device");
@@ -939,10 +939,10 @@ alloc_fail:
sbp2_max_speed_and_size(scsi_id);
/* Add this device to the scsi layer now */
- sdev = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
- if (IS_ERR(sdev)) {
+ error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
+ if (error) {
SBP2_ERR("scsi_add_device failed");
- return PTR_ERR(sdev);
+ return error;
}
return 0;
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index a0975c78b968..b86f170fa8ed 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -1264,6 +1264,19 @@ struct scsi_device *__scsi_add_device(struct Scsi_Host *shost, uint channel,
}
EXPORT_SYMBOL(__scsi_add_device);
+int scsi_add_device(struct Scsi_Host *host, uint channel,
+ uint target, uint lun)
+{
+ struct scsi_device *sdev =
+ __scsi_add_device(host, channel, target, lun, NULL);
+ if (IS_ERR(sdev))
+ return PTR_ERR(sdev);
+
+ scsi_device_put(sdev);
+ return 0;
+}
+EXPORT_SYMBOL(scsi_add_device);
+
void scsi_rescan_device(struct device *dev)
{
struct scsi_driver *drv;
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index da63722c0123..c0e4c67d836f 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -178,8 +178,8 @@ static inline struct scsi_target *scsi_target(struct scsi_device *sdev)
extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
uint, uint, uint, void *hostdata);
-#define scsi_add_device(host, channel, target, lun) \
- __scsi_add_device(host, channel, target, lun, NULL)
+extern int scsi_add_device(struct Scsi_Host *host, uint channel,
+ uint target, uint lun);
extern void scsi_remove_device(struct scsi_device *);
extern int scsi_device_cancel(struct scsi_device *, int);