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Commit 515729ec authored by Paul Mackerras's avatar Paul Mackerras
Browse files

powermac: Use a spinlock in swim3.c (floppy driver) instead of cli 



Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 3fb62b51

drivers/block/swim3.c

+10 −10
Original line number Diff line number Diff line
@@ -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 swim3 { 


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 @@ static void do_fd_request(request_queue_t * q) 
#endif /* CONFIG_PMAC_MEDIABAY */

		start_request(&floppy_states[i]);

	}

	sti();

}



static void start_request(struct floppy_state *fs)
@@ -370,7 +371,7 @@ static void set_timeout(struct floppy_state *fs, int nticks, 
{

	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 @@ static void set_timeout(struct floppy_state *fs, int nticks, 
	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 @@ static int grab_drive(struct floppy_state *fs, enum swim_state state, 
{

	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 @@ static int grab_drive(struct floppy_state *fs, enum swim_state state, 
		--fs->wanted;

	}

	fs->state = state;

	restore_flags(flags);

	spin_unlock_irqrestore(&fs->lock, flags);

	return 0;

}
@@ -813,11 +813,10 @@ static void release_drive(struct floppy_state *fs) 
{

	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 @@ static int swim3_add_device(struct device_node *swim) 
		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);