ide: remove IDE_ARCH_LOCK (v2)

* Add ->{get,release}_lock methods to struct ide_port_info
  and struct ide_host.

* Convert core IDE code, m68k IDE code and falconide support to use
  ->{get,release}_lock methods instead of ide_{get,release}_lock().

* Remove IDE_ARCH_LOCK.

v2:
* Build fix from Geert updating ide_{get,release}_lock() callers in
  falconide.c.

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Michael Schmitz <schmitz@debian.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

3 files changed, 31 insertions, 8 deletions

diff --git a/drivers/ide/falconide.c b/drivers/ide/falconide.c
index a638e952d67a..d4d7ff1a3516 100644
--- a/drivers/ide/falconide.c
+++ b/drivers/ide/falconide.c
@@ -40,8 +40,27 @@
      *  which is shared between several drivers.
      */
 
-int falconide_intr_lock;
-EXPORT_SYMBOL(falconide_intr_lock);
+static int falconide_intr_lock;
+
+static void falconide_release_lock(void)
+{
+	if (falconide_intr_lock == 0) {
+		printk(KERN_ERR "%s: bug\n", __func__);
+		return;
+	}
+	falconide_intr_lock = 0;
+	stdma_release();
+}
+
+static void falconide_get_lock(irq_handler_t handler, void *data)
+{
+	if (falconide_intr_lock == 0) {
+		if (in_interrupt() > 0)
+			panic("Falcon IDE hasn't ST-DMA lock in interrupt");
+		stdma_lock(handler, data);
+		falconide_intr_lock = 1;
+	}
+}
 
 static void falconide_input_data(ide_drive_t *drive, struct request *rq,
 				 void *buf, unsigned int len)
@@ -81,6 +100,8 @@ static const struct ide_tp_ops falconide_tp_ops = {
 };
 
 static const struct ide_port_info falconide_port_info = {
+	.get_lock		= falconide_get_lock,
+	.release_lock		= falconide_release_lock,
 	.tp_ops			= &falconide_tp_ops,
 	.host_flags		= IDE_HFLAG_NO_DMA | IDE_HFLAG_SERIALIZE,
 };
@@ -132,9 +153,9 @@ static int __init falconide_init(void)
 		goto err;
 	}
 
-	ide_get_lock(NULL, NULL);
+	falconide_get_lock(NULL, NULL);
 	rc = ide_host_register(host, &falconide_port_info, hws);
-	ide_release_lock();
+	falconide_release_lock();
 
 	if (rc)
 		goto err_free;
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index e85060164203..030b0ea1a1e1 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -501,8 +501,8 @@ static inline int ide_lock_host(struct ide_host *host, ide_hwif_t *hwif)
 	if (host->host_flags & IDE_HFLAG_SERIALIZE) {
 		rc = test_and_set_bit_lock(IDE_HOST_BUSY, &host->host_busy);
 		if (rc == 0) {
-			/* for atari only */
-			ide_get_lock(ide_intr, hwif);
+			if (host->get_lock)
+				host->get_lock(ide_intr, hwif);
 		}
 	}
 	return rc;
@@ -511,8 +511,8 @@ static inline int ide_lock_host(struct ide_host *host, ide_hwif_t *hwif)
 static inline void ide_unlock_host(struct ide_host *host)
 {
 	if (host->host_flags & IDE_HFLAG_SERIALIZE) {
-		/* for atari only */
-		ide_release_lock();
+		if (host->release_lock)
+			host->release_lock();
 		clear_bit_unlock(IDE_HOST_BUSY, &host->host_busy);
 	}
 }
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index b0510b033d78..a3edbb5d0452 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1325,6 +1325,8 @@ struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
 
 	if (d) {
 		host->init_chipset = d->init_chipset;
+		host->get_lock     = d->get_lock;
+		host->release_lock = d->release_lock;
 		host->host_flags = d->host_flags;
 	}