>>>>> "Shaun" == Shaun Tancheff <shaun@xxxxxxxxxxxx> writes:
Shaun,
Shaun> SATA drives may support write same via SCT. This is useful for
Shaun> setting the drive contents to a specific pattern (0's).
index 428c03e..c5c8424 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -52,6 +52,7 @@
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/pr.h>
+#include <linux/ata.h>
#include <asm/uaccess.h>
#include <asm/unaligned.h>
No ATA stuff in sd.c, please.
@@ -2761,24 +2762,26 @@ static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
{
struct scsi_device *sdev = sdkp->device;
- if (sdev->host->no_write_same) {
- sdev->no_write_same = 1;
-
- return;
- }
-
if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
- /* too large values might cause issues with arcmsr */
- int vpd_buf_len = 64;
-
sdev->no_report_opcodes = 1;
/* Disable WRITE SAME if REPORT SUPPORTED OPERATION
* CODES is unsupported and the device has an ATA
* Information VPD page (SAT).
*/
The above comment tells you how to enable WRITE SAME in libata's
SCSI-ATA translation.
- if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len))
+ if (!scsi_get_vpd_page(sdev, 0x89, buffer, SD_BUF_SIZE))
That vpd_buf_len is intentional.
--
Martin K. Petersen Oracle Linux Engineering
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