Tejun Heo wrote:
@@ -496,6 +496,23 @@ struct ata_eh_context {
unsigned int did_probe_mask;
};
+struct ata_link {
+ struct ata_port *ap;
+
+ unsigned int active_tag; /* active tag on this link */
+ u32 sactive; /* active NCQ commands */
+
+ unsigned int hw_sata_spd_limit;
+ unsigned int sata_spd_limit;
+
+ /* record runtime error info, protected by host_set lock */
+ struct ata_eh_info eh_info;
+ /* EH context */
+ struct ata_eh_context eh_context;
+
+ struct ata_device device[1];
+};
+
struct ata_port {
struct Scsi_Host *host; /* our co-allocated scsi host */
const struct ata_port_operations *ops;
@@ -520,22 +537,13 @@ struct ata_port {
unsigned int mwdma_mask;
unsigned int udma_mask;
unsigned int cbl; /* cable type; ATA_CBL_xxx */
- unsigned int hw_sata_spd_limit;
- unsigned int sata_spd_limit; /* SATA PHY speed limit */
-
- /* record runtime error info, protected by host_set lock */
- struct ata_eh_info eh_info;
- /* EH context owned by EH */
- struct ata_eh_context eh_context;
-
- struct ata_device device[ATA_MAX_DEVICES];
struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
unsigned long qc_allocated;
unsigned int qc_active;
- unsigned int active_tag;
- u32 sactive;
+ struct ata_link link; /* host default link */
+ struct ata_device __dev1; /* storage for link.device[1] */
This storage mess for link.device[] is NAK'd.
This patch overall looks good, but it should really be entirely an
equivalent-transformation patch, one that is easy to review and prove
correct.
As such, this patch should move 'struct ata_device
device[ATA_MAX_DEVICES]' into struct ata_link, rather than the strange
arrangement you have above. If you want to do something unusual like
this, it's better to do it in a separate patch.
Jeff
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