From 146f7262ee0ec7fc6882f06e5fcb13883308073c Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Sat, 10 Sep 2005 12:44:09 -0500 Subject: [PATCH] [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 Signed-off-by: James Bottomley --- drivers/ieee1394/sbp2.c | 8 ++++---- drivers/scsi/scsi_scan.c | 13 +++++++++++++ include/scsi/scsi_device.h | 4 ++-- 3 files changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c index 627af50764..de88218ef7 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 a0975c78b9..b86f170fa8 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 da63722c01..c0e4c67d83 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); -- 2.39.5