powermac: Use a spinlock in swim3.c (floppy driver) instead of cli
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index e425ad3..af7cb2b 100644
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -28,6 +28,7 @@
#include <linux/devfs_fs_kernel.h>
#include <linux/interrupt.h>
#include <linux/module.h>
+#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/dbdma.h>
#include <asm/prom.h>
@@ -176,6 +177,7 @@
struct floppy_state {
enum swim_state state;
+ spinlock_t lock;
struct swim3 __iomem *swim3; /* hardware registers */
struct dbdma_regs __iomem *dma; /* DMA controller registers */
int swim3_intr; /* interrupt number for SWIM3 */
@@ -304,7 +306,6 @@
#endif /* CONFIG_PMAC_MEDIABAY */
start_request(&floppy_states[i]);
}
- sti();
}
static void start_request(struct floppy_state *fs)
@@ -370,7 +371,7 @@
{
unsigned long flags;
- save_flags(flags); cli();
+ spin_lock_irqsave(&fs->lock, flags);
if (fs->timeout_pending)
del_timer(&fs->timeout);
fs->timeout.expires = jiffies + nticks;
@@ -378,7 +379,7 @@
fs->timeout.data = (unsigned long) fs;
add_timer(&fs->timeout);
fs->timeout_pending = 1;
- restore_flags(flags);
+ spin_unlock_irqrestore(&fs->lock, flags);
}
static inline void scan_track(struct floppy_state *fs)
@@ -790,14 +791,13 @@
{
unsigned long flags;
- save_flags(flags);
- cli();
+ spin_lock_irqsave(&fs->lock, flags);
if (fs->state != idle) {
++fs->wanted;
while (fs->state != available) {
if (interruptible && signal_pending(current)) {
--fs->wanted;
- restore_flags(flags);
+ spin_unlock_irqrestore(&fs->lock, flags);
return -EINTR;
}
interruptible_sleep_on(&fs->wait);
@@ -805,7 +805,7 @@
--fs->wanted;
}
fs->state = state;
- restore_flags(flags);
+ spin_unlock_irqrestore(&fs->lock, flags);
return 0;
}
@@ -813,11 +813,10 @@
{
unsigned long flags;
- save_flags(flags);
- cli();
+ spin_lock_irqsave(&fs->lock, flags);
fs->state = idle;
start_request(fs);
- restore_flags(flags);
+ spin_unlock_irqrestore(&fs->lock, flags);
}
static int fd_eject(struct floppy_state *fs)
@@ -1109,6 +1108,7 @@
pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 1);
memset(fs, 0, sizeof(*fs));
+ spin_lock_init(&fs->lock);
fs->state = idle;
fs->swim3 = (struct swim3 __iomem *)
ioremap(swim->addrs[0].address, 0x200);