[libata] Prefer SCSI_SENSE_BUFFERSIZE to sizeof()

[linux-2.6-omap-h63xx.git] / drivers / ata / libata-scsi.c

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 14daf4848f09add8d0e7e90659251fd25afcc649..3fd08201bef472d4b38774b545ee76a4592ffe66 100644 (file)
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -517,7 +517,7 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
                qc->scsicmd = cmd;
                qc->scsidone = done;
 
-               qc->__sg = scsi_sglist(cmd);
+               qc->sg = scsi_sglist(cmd);
                qc->n_elem = scsi_sg_count(cmd);
        } else {
                cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
@@ -2210,7 +2210,7 @@ unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
 
                /* sector size */
                ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
-               ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
+               ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE & 0xff);
        } else {
                /* sector count, 64-bit */
                ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
@@ -2224,7 +2224,7 @@ unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
 
                /* sector size */
                ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
-               ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
+               ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE & 0xff);
        }
 
        return 0;
@@ -2331,7 +2331,7 @@ static void atapi_request_sense(struct ata_queued_cmd *qc)
        DPRINTK("ATAPI request sense\n");
 
        /* FIXME: is this needed? */
-       memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
+       memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 
        ap->ops->tf_read(ap, &qc->tf);
 
@@ -2341,7 +2341,9 @@ static void atapi_request_sense(struct ata_queued_cmd *qc)
 
        ata_qc_reinit(qc);
 
-       ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
+       /* setup sg table and init transfer direction */
+       sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
+       ata_sg_init(qc, &qc->sgent, 1);
        qc->dma_dir = DMA_FROM_DEVICE;
 
        memset(&qc->cdb, 0, qc->dev->cdb_len);
@@ -2352,10 +2354,10 @@ static void atapi_request_sense(struct ata_queued_cmd *qc)
        qc->tf.command = ATA_CMD_PACKET;
 
        if (ata_pio_use_silly(ap)) {
-               qc->tf.protocol = ATA_PROT_ATAPI_DMA;
+               qc->tf.protocol = ATAPI_PROT_DMA;
                qc->tf.feature |= ATAPI_PKT_DMA;
        } else {
-               qc->tf.protocol = ATA_PROT_ATAPI;
+               qc->tf.protocol = ATAPI_PROT_PIO;
                qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
                qc->tf.lbah = 0;
        }
@@ -2526,12 +2528,12 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
        if (using_pio || nodata) {
                /* no data, or PIO data xfer */
                if (nodata)
-                       qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
+                       qc->tf.protocol = ATAPI_PROT_NODATA;
                else
-                       qc->tf.protocol = ATA_PROT_ATAPI;
+                       qc->tf.protocol = ATAPI_PROT_PIO;
        } else {
                /* DMA data xfer */
-               qc->tf.protocol = ATA_PROT_ATAPI_DMA;
+               qc->tf.protocol = ATAPI_PROT_DMA;
                qc->tf.feature |= ATAPI_PKT_DMA;
 
                if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
@@ -2690,6 +2692,24 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
        if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
                goto invalid_fld;
 
+       /*
+        * Filter TPM commands by default. These provide an
+        * essentially uncontrolled encrypted "back door" between
+        * applications and the disk. Set libata.allow_tpm=1 if you
+        * have a real reason for wanting to use them. This ensures
+        * that installed software cannot easily mess stuff up without
+        * user intent. DVR type users will probably ship with this enabled
+        * for movie content management.
+        *
+        * Note that for ATA8 we can issue a DCS change and DCS freeze lock
+        * for this and should do in future but that it is not sufficient as
+        * DCS is an optional feature set. Thus we also do the software filter
+        * so that we comply with the TC consortium stated goal that the user
+        * can turn off TC features of their system.
+        */
+       if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
+               goto invalid_fld;
+
        /* We may not issue DMA commands if no DMA mode is set */
        if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
                goto invalid_fld;