From: Andy Grover <agrover@xxxxxxxxxx>
Create helper function for freeing sgls and only call it if needed.
Based on suggestion from hch.
Signed-off-by: Andy Grover <agrover@xxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/target/target_core_transport.c | 37 ++++++++++---------------------
1 files changed, 12 insertions(+), 25 deletions(-)
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index ceb7ee7..9cefdf4 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -3723,40 +3723,27 @@ static void transport_free_dev_tasks(struct se_cmd *cmd)
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
}
-static inline void transport_free_pages(struct se_cmd *cmd)
+static inline void transport_free_sgl(struct scatterlist *sgl, int nents)
{
struct scatterlist *sg;
- int free_page = 1;
int count;
- if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)
- free_page = 0;
+ for_each_sg(sgl, sg, nents, count)
+ __free_page(sg_page(sg));
- for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, count) {
- /*
- * Only called if
- * SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is NOT in use,
- */
- if (free_page)
- __free_page(sg_page(sg));
+ kfree(sgl);
+}
- }
- if (free_page)
- kfree(cmd->t_data_sg);
+static inline void transport_free_pages(struct se_cmd *cmd)
+{
+ if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)
+ return;
+
+ transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents);
cmd->t_data_sg = NULL;
cmd->t_data_nents = 0;
- for_each_sg(cmd->t_bidi_data_sg, sg, cmd->t_bidi_data_nents, count) {
- /*
- * Only called if
- * SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC is NOT in use,
- */
- if (free_page)
- __free_page(sg_page(sg));
-
- }
- if (free_page)
- kfree(cmd->t_bidi_data_sg);
+ transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents);
cmd->t_bidi_data_sg = NULL;
cmd->t_bidi_data_nents = 0;
}
--
1.7.6
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
