diff options
Diffstat (limited to 'drivers/block/amiflop.c')
| -rw-r--r-- | drivers/block/amiflop.c | 59 |
1 files changed, 48 insertions, 11 deletions
diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c index 76f114f0bba..ead8b7792c5 100644 --- a/drivers/block/amiflop.c +++ b/drivers/block/amiflop.c @@ -114,8 +114,6 @@ static unsigned long int fd_def_df0 = FD_DD_3; /* default for df0 if it does module_param(fd_def_df0, ulong, 0); MODULE_LICENSE("GPL"); -static struct request_queue *floppy_queue; - /* * Macros */ @@ -164,6 +162,7 @@ static volatile int selected = -1; /* currently selected drive */ static int writepending; static int writefromint; static char *raw_buf; +static int fdc_queue; static DEFINE_SPINLOCK(amiflop_lock); @@ -1334,6 +1333,42 @@ static int get_track(int drive, int track) return -1; } +/* + * Round-robin between our available drives, doing one request from each + */ +static struct request *set_next_request(void) +{ + struct request_queue *q; + int cnt = FD_MAX_UNITS; + struct request *rq; + + /* Find next queue we can dispatch from */ + fdc_queue = fdc_queue + 1; + if (fdc_queue == FD_MAX_UNITS) + fdc_queue = 0; + + for(cnt = FD_MAX_UNITS; cnt > 0, cnt--) { + + if (unit[fdc_queue].type->code == FD_NODRIVE) { + if (++fdc_queue == FD_MAX_UNITS) + fdc_queue = 0; + cotinue; + } + + q = unit[fdc_queue].gendisk->queue; + if (q) { + rq = blk_fetch_request(q); + if (rq) + break; + } + + if (++fdc_queue == FD_MAX_UNITS) + fdc_queue = 0; + } + + return rq; +} + static void redo_fd_request(void) { struct request *rq; @@ -1345,7 +1380,7 @@ static void redo_fd_request(void) int err; next_req: - rq = blk_fetch_request(floppy_queue); + rq = set_next_request(); if (!rq) { /* Nothing left to do */ return; @@ -1682,6 +1717,13 @@ static int __init fd_probe_drives(void) continue; } unit[drive].gendisk = disk; + + disk->queue = blk_init_queue(do_fd_request, &amiflop_lock); + if (!disk->queue) { + unit[drive].type->code = FD_NODRIVE; + continue; + } + drives++; if ((unit[drive].trackbuf = kmalloc(FLOPPY_MAX_SECTORS * 512, GFP_KERNEL)) == NULL) { printk("no mem for "); @@ -1695,7 +1737,6 @@ static int __init fd_probe_drives(void) disk->fops = &floppy_fops; sprintf(disk->disk_name, "fd%d", drive); disk->private_data = &unit[drive]; - disk->queue = floppy_queue; set_capacity(disk, 880*2); add_disk(disk); } @@ -1743,11 +1784,6 @@ static int __init amiga_floppy_probe(struct platform_device *pdev) goto out_irq2; } - ret = -ENOMEM; - floppy_queue = blk_init_queue(do_fd_request, &amiflop_lock); - if (!floppy_queue) - goto out_queue; - ret = -ENODEV; if (fd_probe_drives() < 1) /* No usable drives */ goto out_probe; @@ -1791,7 +1827,6 @@ static int __init amiga_floppy_probe(struct platform_device *pdev) return 0; out_probe: - blk_cleanup_queue(floppy_queue); out_queue: free_irq(IRQ_AMIGA_CIAA_TB, NULL); out_irq2: @@ -1810,9 +1845,12 @@ static int __exit amiga_floppy_remove(struct platform_device *pdev) for( i = 0; i < FD_MAX_UNITS; i++) { if (unit[i].type->code != FD_NODRIVE) { + struct request_queue *q = unit[i].gendisk->queue; del_gendisk(unit[i].gendisk); put_disk(unit[i].gendisk); kfree(unit[i].trackbuf); + if (q) + blk_cleanup_queue(q); } } blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); @@ -1820,7 +1858,6 @@ static int __exit amiga_floppy_remove(struct platform_device *pdev) free_irq(IRQ_AMIGA_DSKBLK, NULL); custom.dmacon = DMAF_DISK; /* disable DMA */ amiga_chip_free(raw_buf); - blk_cleanup_queue(floppy_queue); unregister_blkdev(FLOPPY_MAJOR, "fd"); } #endif |