diff options
| -rw-r--r-- | drivers/target/target_core_transport.c | 21 | ||||
| -rw-r--r-- | include/target/target_core_base.h | 2 |
2 files changed, 22 insertions, 1 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index c974e1373c77..87d64add7874 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1991,10 +1991,29 @@ static inline void transport_free_sgl(struct scatterlist *sgl, int nents) kfree(sgl); } +static inline void transport_reset_sgl_orig(struct se_cmd *cmd) +{ + /* + * Check for saved t_data_sg that may be used for COMPARE_AND_WRITE + * emulation, and free + reset pointers if necessary.. + */ + if (!cmd->t_data_sg_orig) + return; + + kfree(cmd->t_data_sg); + cmd->t_data_sg = cmd->t_data_sg_orig; + cmd->t_data_sg_orig = NULL; + cmd->t_data_nents = cmd->t_data_nents_orig; + cmd->t_data_nents_orig = 0; +} + static inline void transport_free_pages(struct se_cmd *cmd) { - if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) + if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) { + transport_reset_sgl_orig(cmd); return; + } + transport_reset_sgl_orig(cmd); transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents); cmd->t_data_sg = NULL; diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 4a26a18a24d6..7fdb3fae2961 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -478,7 +478,9 @@ struct se_cmd { struct work_struct work; struct scatterlist *t_data_sg; + struct scatterlist *t_data_sg_orig; unsigned int t_data_nents; + unsigned int t_data_nents_orig; void *t_data_vmap; struct scatterlist *t_bidi_data_sg; unsigned int t_bidi_data_nents; |