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authorNicholas Bellinger <nab@linux-iscsi.org>2011-07-21 04:41:48 +0000
committerNicholas Bellinger <nab@linux-iscsi.org>2011-07-22 09:37:48 +0000
commit1d20bb6147954d4fbd337a3d1b40c7eeae254cd7 (patch)
tree23dcdd9376c5e26acfd2817812e2d5ccfbf81149 /drivers/target/target_core_pscsi.c
parent6708bb27bb2703da238f21f516034263348af5be (diff)
downloadlinux-1d20bb6147954d4fbd337a3d1b40c7eeae254cd7.tar.bz2
target: ->map_task_SG conversion to ->map_control_SG and ->map_data_SG
This patch breaks up the ->map_task_SG() backend call into two seperate ->map_control_SG() and ->map_data_SG() in order to better address IBLOCK and pSCSI. IBLOCK only allocates bios for ->map_data_SG(), and pSCSI will allocate a struct request for both cases. This patch fixes incorrect usage of ->map_task_SG() for all se_cmd descriptors in transport_generic_new_cmd() by moving the call into it's proper location directly inside of transport_allocate_data_tasks() Reported-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_pscsi.c')
-rw-r--r--drivers/target/target_core_pscsi.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index a2ce5998d318..2b7b0da9146d 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -1049,7 +1049,7 @@ static inline struct bio *pscsi_get_bio(int sg_num)
return bio;
}
-static int __pscsi_map_task_SG(
+static int __pscsi_map_SG(
struct se_task *task,
struct scatterlist *task_sg,
u32 task_sg_num,
@@ -1198,7 +1198,10 @@ fail:
return ret;
}
-static int pscsi_map_task_SG(struct se_task *task)
+/*
+ * pSCSI maps both ->map_control_SG() and ->map_data_SG() to a single call.
+ */
+static int pscsi_map_SG(struct se_task *task)
{
int ret;
@@ -1206,13 +1209,13 @@ static int pscsi_map_task_SG(struct se_task *task)
* Setup the main struct request for the task->task_sg[] payload
*/
- ret = __pscsi_map_task_SG(task, task->task_sg, task->task_sg_nents, 0);
+ ret = __pscsi_map_SG(task, task->task_sg, task->task_sg_nents, 0);
if (ret >= 0 && task->task_sg_bidi) {
/*
* If present, set up the extra BIDI-COMMAND SCSI READ
* struct request and payload.
*/
- ret = __pscsi_map_task_SG(task, task->task_sg_bidi,
+ ret = __pscsi_map_SG(task, task->task_sg_bidi,
task->task_sg_nents, 1);
}
@@ -1340,7 +1343,8 @@ static struct se_subsystem_api pscsi_template = {
.owner = THIS_MODULE,
.transport_type = TRANSPORT_PLUGIN_PHBA_PDEV,
.cdb_none = pscsi_CDB_none,
- .map_task_SG = pscsi_map_task_SG,
+ .map_control_SG = pscsi_map_SG,
+ .map_data_SG = pscsi_map_SG,
.attach_hba = pscsi_attach_hba,
.detach_hba = pscsi_detach_hba,
.pmode_enable_hba = pscsi_pmode_enable_hba,