mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
target: Do memory allocation for bidi commands using target_alloc_sgl
This patch updates transport_generic_new_cmd() to call target_alloc_sgl() for SGL + page memory allocation for se_cmd->t_bidi_data_sg. It also adds the special case for SCF_COMPARE_AND_WRITE to calculate a different bidi_length based upon se_cmd->t_task_nolb. Reported-by: Christoph Hellwig <hch@lst.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Martin Petersen <martin.petersen@oracle.com> Cc: Chris Mason <chris.mason@fusionio.com> Cc: James Bottomley <JBottomley@Parallels.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Nicholas Bellinger <nab@daterainc.com>
This commit is contained in:
parent
200939940e
commit
8cefe07b5e
@ -2149,6 +2149,23 @@ transport_generic_new_cmd(struct se_cmd *cmd)
|
||||
cmd->data_length) {
|
||||
bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB);
|
||||
|
||||
if ((cmd->se_cmd_flags & SCF_BIDI) ||
|
||||
(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) {
|
||||
u32 bidi_length;
|
||||
|
||||
if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)
|
||||
bidi_length = cmd->t_task_nolb *
|
||||
cmd->se_dev->dev_attrib.block_size;
|
||||
else
|
||||
bidi_length = cmd->data_length;
|
||||
|
||||
ret = target_alloc_sgl(&cmd->t_bidi_data_sg,
|
||||
&cmd->t_bidi_data_nents,
|
||||
bidi_length, zero_flag);
|
||||
if (ret < 0)
|
||||
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
|
||||
}
|
||||
|
||||
ret = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents,
|
||||
cmd->data_length, zero_flag);
|
||||
if (ret < 0)
|
||||
|
Loading…
Reference in New Issue
Block a user