OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

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

Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras 2005-11-08 12:15:36 +11:00
parent 3fb62b5148
commit 515729ece1
1 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/block/swim3.c
View File

@ -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);