scsi: core: Adjust DBD setting in MODE SENSE for caching mode page per LLD (0ec96913) · Commits · 戴 / test

UFS JEDEC standards require DBD field to be set to 1 in mode sense command. This patch allows LLD to define the setting of DBD, if required. Link: https://lore.kernel.org/r/0101016ed3d643f9-ffd45d6c-c593-4a13-a18f-a32da3d3bb97-000000@us-west-2.amazonses.com Reviewed-by:

drivers/scsi/scsi_lib.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -2108,6 +2108,8 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,

		memset(data, 0, sizeof(*data));
		memset(&cmd[0], 0, 12);

		dbd = sdev->set_dbd_for_ms ? 8 : dbd;
		cmd[1] = dbd & 0x18; /* allows DBD and LLBA bits */
		cmd[2] = modepage;

+1 −0

Original line number	Diff line number	Diff line
		@@ -172,6 +172,7 @@ struct scsi_device {
		* because we did a bus reset. */
		unsigned use_10_for_rw:1; /* first try 10-byte read / write */
		unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
		unsigned set_dbd_for_ms:1; /* Set "DBD" field in mode sense */
		unsigned no_report_opcodes:1; /* no REPORT SUPPORTED OPERATION CODES */
		unsigned no_write_same:1; /* no WRITE SAME command */
		unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */