From: Ilias Tsitsimpis Date: Thu, 23 Apr 2015 18:30:07 +0000 (+0300) Subject: target/transport: Always initialize bidi fields in se_cmd X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b32bd0a8ee6a19f9b70aa4fcb9bfc802b105ce05;p=linux-beck.git target/transport: Always initialize bidi fields in se_cmd Fields t_bidi_data_sg and t_bidi_data_nents are set only in the presence of BIDI commands. This means that the underlying code (for example TCMU) cannot inspect them when the SCSI command is not a BIDI one. Ensure the code always initializes these fields with the given values, even when the SCSI command is not a BIDI one. Set t_bidi_data_sg to sgl_bidi (which should be NULL for non-BIDI commands) and t_bidi_data_nents to sgl_bidi_count (which should be 0 for non-BIDI commands). This allows the underlying code to use these fields unconditionally. Signed-off-by: Ilias Tsitsimpis Signed-off-by: Vangelis Koukis Reviewed-by: Andy Grover Signed-off-by: Nicholas Bellinger --- diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 231812d61357..078d32102cce 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1353,11 +1353,9 @@ transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl, cmd->t_data_sg = sgl; cmd->t_data_nents = sgl_count; + cmd->t_bidi_data_sg = sgl_bidi; + cmd->t_bidi_data_nents = sgl_bidi_count; - if (sgl_bidi && sgl_bidi_count) { - cmd->t_bidi_data_sg = sgl_bidi; - cmd->t_bidi_data_nents = sgl_bidi_count; - } cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; return 0; }