scsi: qla2xxx: Add size check for ELS status entry layout on 29xx

Add a BUILD_BUG_ON in qla2x00_module_init() to validate that struct
els_sts_entry_24xx_ext is 128 bytes, matching the 29xx firmware IOCB
size.

The extended layout (29xx) overlays the base els_sts_entry_24xx for
every field read in qla24xx_els_ct_entry(): comp_status,
total_byte_count, error_subcode_1/2, d_id[], s_id[], and control_flags
all sit at byte-identical offsets in both structs.  Only
vp_index/sof_type at offset 14-15 differs (bit-packed differently in the
ext variant), but that field is write-only on the issue path and never
read in this completion handler.

Add a docblock at the top of qla24xx_els_ct_entry() documenting this
layout property.  Improve a few log messages for clarity.

Signed-off-by: Nilesh Javali <njavali@marvell.com>
Reviewed-by: Hannes Reinecke <hare@kernel.org>
Link: https://patch.msgid.link/20260723050413.3897522-31-njavali@marvell.com
Signed-off-by: Martin K. Petersen (Oracle) <mkp@kernel.org>

0 files changed, 0 insertions, 0 deletions