From 315cb0ad124575e75da2d0e0a95990587fc23485 Mon Sep 17 00:00:00 2001 From: James Smart Date: Thu, 7 Aug 2008 20:49:30 -0400 Subject: [SCSI] scsi_host_lookup: error returns and NULL pointers This patch cleans up the behavior of scsi_host_lookup(). The original implementation attempted to use the dual role of either returning a pointer value, or a negative error code. User's needed to use IS_ERR() to check the result. Additionally, the IS_ERR() macro never checks for when a NULL pointer was returned, so a NULL pointer actually passes with a success case. Note: scsi_host_get(), used by scsi_host_lookup(), can return a NULL pointer. Talk about a mudhole for the unitiated to step into.... This patch converts scsi_host_lookup() to return either NULL or a valid pointer. The consumers were updated for the change. Signed-off-by: James Smart Signed-off-by: James Bottomley --- drivers/scsi/hosts.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/scsi/hosts.c') diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index fed0b02ebc1d..3fdbb13e80a8 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -464,7 +464,7 @@ static int __scsi_host_match(struct device *dev, void *data) struct Scsi_Host *scsi_host_lookup(unsigned short hostnum) { struct device *cdev; - struct Scsi_Host *shost = ERR_PTR(-ENXIO); + struct Scsi_Host *shost = NULL; cdev = class_find_device(&shost_class, NULL, &hostnum, __scsi_host_match); -- cgit