diff options
Diffstat (limited to 'drivers/scsi/scsi_transport_spi.c')
| -rw-r--r-- | drivers/scsi/scsi_transport_spi.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c index cf08071a9b6e..fa2aece76cc2 100644 --- a/drivers/scsi/scsi_transport_spi.c +++ b/drivers/scsi/scsi_transport_spi.c @@ -32,6 +32,7 @@ #include <scsi/scsi_host.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_eh.h> +#include <scsi/scsi_tcq.h> #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_spi.h> @@ -1207,6 +1208,28 @@ int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, } EXPORT_SYMBOL_GPL(spi_populate_ppr_msg); +/** + * spi_populate_tag_msg - place a tag message in a buffer + * @msg: pointer to the area to place the tag + * @cmd: pointer to the scsi command for the tag + * + * Notes: + * designed to create the correct type of tag message for the + * particular request. Returns the size of the tag message. + * May return 0 if TCQ is disabled for this device. + **/ +int spi_populate_tag_msg(unsigned char *msg, struct scsi_cmnd *cmd) +{ + if (cmd->flags & SCMD_TAGGED) { + *msg++ = MSG_SIMPLE_TAG; + *msg++ = cmd->request->tag; + return 2; + } + + return 0; +} +EXPORT_SYMBOL_GPL(spi_populate_tag_msg); + #ifdef CONFIG_SCSI_CONSTANTS static const char * const one_byte_msgs[] = { /* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers", |