ata: libata: Add an argument to ata_eh_reset()

Pass the ATA port pointer as first argument to ata_eh_reset(). No
functionality has been changed. This patch prepares for enabling lock
context analysis. Without this patch, lockdep_assert_held() statements
would have to be added before each ata_eh_reset() call because the
compiler doesn't know that ap->link.p == ap. See also ata_link_init().

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>

Author: bvanassche

drivers/ata/libata-eh.c

@@ -2831,10 +2831,9 @@ static bool ata_eh_followup_srst_needed(struct ata_link *link, int rc)
 	return false;
 }
 
-int ata_eh_reset(struct ata_link *link, int classify,
+int ata_eh_reset(struct ata_port *ap, struct ata_link *link, int classify,
 		 struct ata_reset_operations *reset_ops)
 {
-	struct ata_port *ap = link->ap;
 	struct ata_link *slave = ap->slave_link;
 	struct ata_eh_context *ehc = &link->eh_context;
 	struct ata_eh_context *sehc = slave ? &slave->eh_context : NULL;
@@ -3882,7 +3881,8 @@ int ata_eh_recover(struct ata_port *ap, struct ata_reset_operations *reset_ops,
 		if (!(ehc->i.action & ATA_EH_RESET))
 			continue;
 
-		rc = ata_eh_reset(link, ata_link_nr_vacant(link), reset_ops);
+		rc = ata_eh_reset(ap, link, ata_link_nr_vacant(link),
+				  reset_ops);
 		if (rc) {
 			ata_link_err(link, "reset failed, giving up\n");
 			goto out;

drivers/ata/libata-pmp.c

@@ -777,7 +777,7 @@ static int sata_pmp_eh_recover_pmp(struct ata_port *ap,
 		struct ata_link *tlink;
 
 		/* reset */
-		rc = ata_eh_reset(link, 0, reset_ops);
+		rc = ata_eh_reset(ap, link, 0, reset_ops);
 		if (rc) {
 			ata_link_err(link, "failed to reset PMP, giving up\n");
 			goto fail;

drivers/ata/libata.h

@@ -187,8 +187,8 @@ extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
 extern void ata_eh_autopsy(struct ata_port *ap);
 const char *ata_get_cmd_name(u8 command);
 extern void ata_eh_report(struct ata_port *ap);
-extern int ata_eh_reset(struct ata_link *link, int classify,
-			struct ata_reset_operations *reset_ops);
+extern int ata_eh_reset(struct ata_port *ap, struct ata_link *link,
+			int classify, struct ata_reset_operations *reset_ops);
 extern int ata_eh_recover(struct ata_port *ap,
 			  struct ata_reset_operations *reset_ops,
 			  struct ata_link **r_failed_disk);