[PATCH V3 12/17] i3c: mipi-i3c-hci: Correct RESP_DATA_LENGTH to bits 15:0

[Adrian Hunter]

The I3C HCI Response Descriptor defines DATA_LENGTH in Bits[15:0],
with Bits[23:16] reserved in all published HCI specification versions:
v1.0 (Table 91) and v1.1/v1.2 (Section 8.5). However,
RESP_DATA_LENGTH extracts Bits[21:0], incorrectly including six
reserved bits.

Update the mask to match the defined field width.

No functional change is expected because compliant controllers return
zero in reserved fields.

Signed-off-by: Adrian Hunter <adrian.hunter at intel.com>
Reviewed-by: Frank Li <Frank.Li at nxp.com>
---


Changes in V3:

	Added Frank Li's Reviewed-by tag.

Changes in V2:

	Reworded the subject, which was previously "i3c: mipi-i3c-hci:
	Fix Response Descriptor DATA_LENGTH mask", to name the macro and
	the corrected bit range.


 drivers/i3c/master/mipi-i3c-hci/cmd.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i3c/master/mipi-i3c-hci/cmd.h b/drivers/i3c/master/mipi-i3c-hci/cmd.h
index 7bada7b4b2de..e0d4a6e0e319 100644
--- a/drivers/i3c/master/mipi-i3c-hci/cmd.h
+++ b/drivers/i3c/master/mipi-i3c-hci/cmd.h
@@ -24,7 +24,7 @@
  */
 #define RESP_STATUS(resp)		FIELD_GET(GENMASK(31, 28), resp)
 #define RESP_TID(resp)			FIELD_GET(GENMASK(27, 24), resp)
-#define RESP_DATA_LENGTH(resp)		FIELD_GET(GENMASK(21,  0), resp)
+#define RESP_DATA_LENGTH(resp)		FIELD_GET(GENMASK(15,  0), resp)
 
 #define RESP_ERR_FIELD			GENMASK(31, 28)
 
-- 
2.53.0