X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fblock%2Fumem.c;h=99806f9ee4ce85910deecfe194462b48cc047b35;hb=dcf397f037f52add9945eced57ca300ab6a4413c;hp=dec74bd23496bc2e3a70ecc6d9430eb717e760a0;hpb=2fe83b3ad12d43799af5f3156886eca443a88bac;p=linux-2.6 diff --git a/drivers/block/umem.c b/drivers/block/umem.c index dec74bd234..99806f9ee4 100644 --- a/drivers/block/umem.c +++ b/drivers/block/umem.c @@ -52,7 +52,7 @@ #include /* O_ACCMODE */ #include /* HDIO_GETGEO */ -#include +#include "umem.h" #include #include @@ -67,9 +67,10 @@ * Version Information */ -#define DRIVER_VERSION "v2.3" -#define DRIVER_AUTHOR "San Mehat, Johannes Erdfelt, NeilBrown" -#define DRIVER_DESC "Micro Memory(tm) PCI memory board block driver" +#define DRIVER_NAME "umem" +#define DRIVER_VERSION "v2.3" +#define DRIVER_AUTHOR "San Mehat, Johannes Erdfelt, NeilBrown" +#define DRIVER_DESC "Micro Memory(tm) PCI memory board block driver" static int debug; /* #define HW_TRACE(x) writeb(x,cards[0].csr_remap + MEMCTRLSTATUS_MAGIC) */ @@ -97,15 +98,9 @@ static int major_nr; #include struct cardinfo { - int card_number; struct pci_dev *dev; - int irq; - - unsigned long csr_base; unsigned char __iomem *csr_remap; - unsigned long csr_len; - unsigned int win_size; /* PCI window size */ unsigned int mm_size; /* size in kbytes */ unsigned int init_size; /* initial segment, in sectors, @@ -113,14 +108,17 @@ struct cardinfo { * have been written */ struct bio *bio, *currentbio, **biotail; + int current_idx; + sector_t current_sector; - request_queue_t *queue; + struct request_queue *queue; struct mm_page { dma_addr_t page_dma; struct mm_dma_desc *desc; int cnt, headcnt; struct bio *bio, **biotail; + int idx; } mm_pages[2]; #define DESC_PER_PAGE ((PAGE_SIZE*2)/sizeof(struct mm_dma_desc)) @@ -233,7 +231,7 @@ static void dump_regs(struct cardinfo *card) */ static void dump_dmastat(struct cardinfo *card, unsigned int dmastat) { - printk(KERN_DEBUG "MM%d*: DMAstat - ", card->card_number); + dev_printk(KERN_DEBUG, &card->dev->dev, "DMAstat - "); if (dmastat & DMASCR_ANY_ERR) printk("ANY_ERR "); if (dmastat & DMASCR_MBE_ERR) @@ -295,7 +293,7 @@ static void mm_start_io(struct cardinfo *card) desc->control_bits &= ~cpu_to_le32(DMASCR_CHAIN_EN); desc->sem_control_bits = desc->control_bits; - + if (debug & DEBUG_LED_ON_TRANSFER) set_led(card, LED_REMOVE, LED_ON); @@ -329,7 +327,7 @@ static int add_bio(struct cardinfo *card); static void activate(struct cardinfo *card) { - /* if No page is Active, and Ready is + /* if No page is Active, and Ready is * not empty, then switch Ready page * to active and start IO. * Then add any bh's that are available to Ready @@ -357,7 +355,7 @@ static inline void reset_page(struct mm_page *page) page->biotail = & page->bio; } -static void mm_unplug_device(request_queue_t *q) +static void mm_unplug_device(struct request_queue *q) { struct cardinfo *card = q->queuedata; unsigned long flags; @@ -368,7 +366,7 @@ static void mm_unplug_device(request_queue_t *q) spin_unlock_irqrestore(&card->lock, flags); } -/* +/* * If there is room on Ready page, take * one bh off list and add it. * return 1 if there was room, else 0. @@ -380,12 +378,16 @@ static int add_bio(struct cardinfo *card) dma_addr_t dma_handle; int offset; struct bio *bio; + struct bio_vec *vec; + int idx; int rw; int len; bio = card->currentbio; if (!bio && card->bio) { card->currentbio = card->bio; + card->current_idx = card->bio->bi_idx; + card->current_sector = card->bio->bi_sector; card->bio = card->bio->bi_next; if (card->bio == NULL) card->biotail = &card->bio; @@ -394,15 +396,17 @@ static int add_bio(struct cardinfo *card) } if (!bio) return 0; + idx = card->current_idx; rw = bio_rw(bio); if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE) return 0; - len = bio_iovec(bio)->bv_len; - dma_handle = pci_map_page(card->dev, - bio_page(bio), - bio_offset(bio), + vec = bio_iovec_idx(bio, idx); + len = vec->bv_len; + dma_handle = pci_map_page(card->dev, + vec->bv_page, + vec->bv_offset, len, (rw==READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE); @@ -410,6 +414,8 @@ static int add_bio(struct cardinfo *card) p = &card->mm_pages[card->Ready]; desc = &p->desc[p->cnt]; p->cnt++; + if (p->bio == NULL) + p->idx = idx; if ((p->biotail) != &bio->bi_next) { *(p->biotail) = bio; p->biotail = &(bio->bi_next); @@ -419,7 +425,7 @@ static int add_bio(struct cardinfo *card) desc->data_dma_handle = dma_handle; desc->pci_addr = cpu_to_le64((u64)desc->data_dma_handle); - desc->local_addr= cpu_to_le64(bio->bi_sector << 9); + desc->local_addr = cpu_to_le64(card->current_sector << 9); desc->transfer_size = cpu_to_le32(len); offset = ( ((char*)&desc->sem_control_bits) - ((char*)p->desc)); desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset)); @@ -435,10 +441,10 @@ static int add_bio(struct cardinfo *card) desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ); desc->sem_control_bits = desc->control_bits; - bio->bi_sector += (len>>9); - bio->bi_size -= len; - bio->bi_idx++; - if (bio->bi_idx >= bio->bi_vcnt) + card->current_sector += (len >> 9); + idx++; + card->current_idx = idx; + if (idx >= bio->bi_vcnt) card->currentbio = NULL; return 1; @@ -461,7 +467,7 @@ static void process_page(unsigned long data) if (card->Active < 0) goto out_unlock; page = &card->mm_pages[card->Active]; - + while (page->headcnt < page->cnt) { struct bio *bio = page->bio; struct mm_dma_desc *desc = &page->desc[page->headcnt]; @@ -471,32 +477,34 @@ static void process_page(unsigned long data) if (!(control & DMASCR_DMA_COMPLETE)) { control = dma_status; - last=1; + last=1; } page->headcnt++; - idx = bio->bi_phys_segments; - bio->bi_phys_segments++; - if (bio->bi_phys_segments >= bio->bi_vcnt) + idx = page->idx; + page->idx++; + if (page->idx >= bio->bi_vcnt) { page->bio = bio->bi_next; + page->idx = page->bio->bi_idx; + } - pci_unmap_page(card->dev, desc->data_dma_handle, + pci_unmap_page(card->dev, desc->data_dma_handle, bio_iovec_idx(bio,idx)->bv_len, (control& DMASCR_TRANSFER_READ) ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); if (control & DMASCR_HARD_ERROR) { /* error */ clear_bit(BIO_UPTODATE, &bio->bi_flags); - printk(KERN_WARNING "MM%d: I/O error on sector %d/%d\n", - card->card_number, - le32_to_cpu(desc->local_addr)>>9, - le32_to_cpu(desc->transfer_size)); + dev_printk(KERN_WARNING, &card->dev->dev, + "I/O error on sector %d/%d\n", + le32_to_cpu(desc->local_addr)>>9, + le32_to_cpu(desc->transfer_size)); dump_dmastat(card, control); } else if (test_bit(BIO_RW, &bio->bi_rw) && le32_to_cpu(desc->local_addr)>>9 == card->init_size) { card->init_size += le32_to_cpu(desc->transfer_size)>>9; if (card->init_size>>1 >= card->mm_size) { - printk(KERN_INFO "MM%d: memory now initialised\n", - card->card_number); + dev_printk(KERN_INFO, &card->dev->dev, + "memory now initialised\n"); set_userbit(card, MEMORY_INITIALIZED, 1); } } @@ -532,7 +540,7 @@ static void process_page(unsigned long data) return_bio = bio->bi_next; bio->bi_next = NULL; - bio_endio(bio, bio->bi_size, 0); + bio_endio(bio, 0); } } @@ -541,13 +549,12 @@ static void process_page(unsigned long data) -- mm_make_request ----------------------------------------------------------------------------------- */ -static int mm_make_request(request_queue_t *q, struct bio *bio) +static int mm_make_request(struct request_queue *q, struct bio *bio) { struct cardinfo *card = q->queuedata; pr_debug("mm_make_request %llu %u\n", (unsigned long long)bio->bi_sector, bio->bi_size); - bio->bi_phys_segments = bio->bi_idx; /* count of completed segments*/ spin_lock_irq(&card->lock); *card->biotail = bio; bio->bi_next = NULL; @@ -585,7 +592,7 @@ HW_TRACE(0x30); else writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16, card->csr_remap+ DMA_STATUS_CTRL + 2); - + /* log errors and clear interrupt status */ if (dma_status & DMASCR_ANY_ERR) { unsigned int data_log1, data_log2; @@ -606,46 +613,51 @@ HW_TRACE(0x30); dump_dmastat(card, dma_status); if (stat & 0x01) - printk(KERN_ERR "MM%d*: Memory access error detected (err count %d)\n", - card->card_number, count); + dev_printk(KERN_ERR, &card->dev->dev, + "Memory access error detected (err count %d)\n", + count); if (stat & 0x02) - printk(KERN_ERR "MM%d*: Multi-bit EDC error\n", - card->card_number); + dev_printk(KERN_ERR, &card->dev->dev, + "Multi-bit EDC error\n"); - printk(KERN_ERR "MM%d*: Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n", - card->card_number, addr_log2, addr_log1, data_log2, data_log1); - printk(KERN_ERR "MM%d*: Fault Check 0x%02x, Fault Syndrome 0x%02x\n", - card->card_number, check, syndrome); + dev_printk(KERN_ERR, &card->dev->dev, + "Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n", + addr_log2, addr_log1, data_log2, data_log1); + dev_printk(KERN_ERR, &card->dev->dev, + "Fault Check 0x%02x, Fault Syndrome 0x%02x\n", + check, syndrome); writeb(0, card->csr_remap + ERROR_COUNT); } if (dma_status & DMASCR_PARITY_ERR_REP) { - printk(KERN_ERR "MM%d*: PARITY ERROR REPORTED\n", card->card_number); + dev_printk(KERN_ERR, &card->dev->dev, + "PARITY ERROR REPORTED\n"); pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); pci_write_config_word(card->dev, PCI_STATUS, cfg_status); } if (dma_status & DMASCR_PARITY_ERR_DET) { - printk(KERN_ERR "MM%d*: PARITY ERROR DETECTED\n", card->card_number); + dev_printk(KERN_ERR, &card->dev->dev, + "PARITY ERROR DETECTED\n"); pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); pci_write_config_word(card->dev, PCI_STATUS, cfg_status); } if (dma_status & DMASCR_SYSTEM_ERR_SIG) { - printk(KERN_ERR "MM%d*: SYSTEM ERROR\n", card->card_number); + dev_printk(KERN_ERR, &card->dev->dev, "SYSTEM ERROR\n"); pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); pci_write_config_word(card->dev, PCI_STATUS, cfg_status); } if (dma_status & DMASCR_TARGET_ABT) { - printk(KERN_ERR "MM%d*: TARGET ABORT\n", card->card_number); + dev_printk(KERN_ERR, &card->dev->dev, "TARGET ABORT\n"); pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); pci_write_config_word(card->dev, PCI_STATUS, cfg_status); } if (dma_status & DMASCR_MASTER_ABT) { - printk(KERN_ERR "MM%d*: MASTER ABORT\n", card->card_number); + dev_printk(KERN_ERR, &card->dev->dev, "MASTER ABORT\n"); pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); pci_write_config_word(card->dev, PCI_STATUS, cfg_status); } @@ -656,7 +668,7 @@ HW_TRACE(0x30); HW_TRACE(0x36); - return IRQ_HANDLED; + return IRQ_HANDLED; } /* ----------------------------------------------------------------------------------- @@ -696,20 +708,20 @@ static int check_battery(struct cardinfo *card, int battery, int status) card->battery[battery].last_change = jiffies; if (card->battery[battery].good) { - printk(KERN_ERR "MM%d: Battery %d now good\n", - card->card_number, battery + 1); + dev_printk(KERN_ERR, &card->dev->dev, + "Battery %d now good\n", battery + 1); card->battery[battery].warned = 0; } else - printk(KERN_ERR "MM%d: Battery %d now FAILED\n", - card->card_number, battery + 1); + dev_printk(KERN_ERR, &card->dev->dev, + "Battery %d now FAILED\n", battery + 1); return 1; } else if (!card->battery[battery].good && !card->battery[battery].warned && time_after_eq(jiffies, card->battery[battery].last_change + (HZ * 60 * 60 * 5))) { - printk(KERN_ERR "MM%d: Battery %d still FAILED after 5 hours\n", - card->card_number, battery + 1); + dev_printk(KERN_ERR, &card->dev->dev, + "Battery %d still FAILED after 5 hours\n", battery + 1); card->battery[battery].warned = 1; return 1; @@ -733,8 +745,8 @@ static void check_batteries(struct cardinfo *card) status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY); if (debug & DEBUG_BATTERY_POLLING) - printk(KERN_DEBUG "MM%d: checking battery status, 1 = %s, 2 = %s\n", - card->card_number, + dev_printk(KERN_DEBUG, &card->dev->dev, + "checking battery status, 1 = %s, 2 = %s\n", (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK", (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK"); @@ -749,7 +761,7 @@ static void check_all_batteries(unsigned long ptr) { int i; - for (i = 0; i < num_cards; i++) + for (i = 0; i < num_cards; i++) if (!(cards[i].flags & UM_FLAG_NO_BATT)) { struct cardinfo *card = &cards[i]; spin_lock_bh(&card->lock); @@ -853,45 +865,56 @@ static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_i unsigned char mem_present; unsigned char batt_status; unsigned int saved_bar, data; + unsigned long csr_base; + unsigned long csr_len; int magic_number; + static int printed_version; - if (pci_enable_device(dev) < 0) - return -ENODEV; + if (!printed_version++) + printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n"); + + ret = pci_enable_device(dev); + if (ret) + return ret; pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8); pci_set_master(dev); card->dev = dev; - card->card_number = num_cards; - card->csr_base = pci_resource_start(dev, 0); - card->csr_len = pci_resource_len(dev, 0); + csr_base = pci_resource_start(dev, 0); + csr_len = pci_resource_len(dev, 0); + if (!csr_base || !csr_len) + return -ENODEV; - printk(KERN_INFO "Micro Memory(tm) controller #%d found at %02x:%02x (PCI Mem Module (Battery Backup))\n", - card->card_number, dev->bus->number, dev->devfn); + dev_printk(KERN_INFO, &dev->dev, + "Micro Memory(tm) controller found (PCI Mem Module (Battery Backup))\n"); if (pci_set_dma_mask(dev, DMA_64BIT_MASK) && pci_set_dma_mask(dev, DMA_32BIT_MASK)) { - printk(KERN_WARNING "MM%d: NO suitable DMA found\n",num_cards); + dev_printk(KERN_WARNING, &dev->dev, "NO suitable DMA found\n"); return -ENOMEM; } - if (!request_mem_region(card->csr_base, card->csr_len, "Micro Memory")) { - printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number); - ret = -ENOMEM; + ret = pci_request_regions(dev, DRIVER_NAME); + if (ret) { + dev_printk(KERN_ERR, &card->dev->dev, + "Unable to request memory region\n"); goto failed_req_csr; } - card->csr_remap = ioremap_nocache(card->csr_base, card->csr_len); + card->csr_remap = ioremap_nocache(csr_base, csr_len); if (!card->csr_remap) { - printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number); + dev_printk(KERN_ERR, &card->dev->dev, + "Unable to remap memory region\n"); ret = -ENOMEM; goto failed_remap_csr; } - printk(KERN_INFO "MM%d: CSR 0x%08lx -> 0x%p (0x%lx)\n", card->card_number, - card->csr_base, card->csr_remap, card->csr_len); + dev_printk(KERN_INFO, &card->dev->dev, + "CSR 0x%08lx -> 0x%p (0x%lx)\n", + csr_base, card->csr_remap, csr_len); switch(card->dev->device) { case 0x5415: @@ -915,7 +938,7 @@ static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_i } if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) { - printk(KERN_ERR "MM%d: Magic number invalid\n", card->card_number); + dev_printk(KERN_ERR, &card->dev->dev, "Magic number invalid\n"); ret = -ENOMEM; goto failed_magic; } @@ -928,7 +951,7 @@ static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_i &card->mm_pages[1].page_dma); if (card->mm_pages[0].desc == NULL || card->mm_pages[1].desc == NULL) { - printk(KERN_ERR "MM%d: alloc failed\n", card->card_number); + dev_printk(KERN_ERR, &card->dev->dev, "alloc failed\n"); goto failed_alloc; } reset_page(&card->mm_pages[0]); @@ -949,7 +972,7 @@ static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_i tasklet_init(&card->tasklet, process_page, (unsigned long)card); card->check_batteries = 0; - + mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY); switch (mem_present) { case MEM_128_MB: @@ -982,12 +1005,13 @@ static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_i card->battery[1].good = !(batt_status & BATTERY_2_FAILURE); card->battery[0].last_change = card->battery[1].last_change = jiffies; - if (card->flags & UM_FLAG_NO_BATT) - printk(KERN_INFO "MM%d: Size %d KB\n", - card->card_number, card->mm_size); + if (card->flags & UM_FLAG_NO_BATT) + dev_printk(KERN_INFO, &card->dev->dev, + "Size %d KB\n", card->mm_size); else { - printk(KERN_INFO "MM%d: Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n", - card->card_number, card->mm_size, + dev_printk(KERN_INFO, &card->dev->dev, + "Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n", + card->mm_size, (batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled"), card->battery[0].good ? "OK" : "FAILURE", (batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled"), @@ -1005,19 +1029,16 @@ static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_i data = ~data; data += 1; - card->win_size = data; - - - if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, "pci-umem", card)) { - printk(KERN_ERR "MM%d: Unable to allocate IRQ\n", card->card_number); + if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, DRIVER_NAME, card)) { + dev_printk(KERN_ERR, &card->dev->dev, + "Unable to allocate IRQ\n"); ret = -ENODEV; goto failed_req_irq; } - card->irq = dev->irq; - printk(KERN_INFO "MM%d: Window size %d bytes, IRQ %d\n", card->card_number, - card->win_size, card->irq); + dev_printk(KERN_INFO, &card->dev->dev, + "Window size %d bytes, IRQ %d\n", data, dev->irq); spin_lock_init(&card->lock); @@ -1037,10 +1058,12 @@ static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_i num_cards++; if (!get_userbit(card, MEMORY_INITIALIZED)) { - printk(KERN_INFO "MM%d: memory NOT initialized. Consider over-writing whole device.\n", card->card_number); + dev_printk(KERN_INFO, &card->dev->dev, + "memory NOT initialized. Consider over-writing whole device.\n"); card->init_size = 0; } else { - printk(KERN_INFO "MM%d: memory already initialized\n", card->card_number); + dev_printk(KERN_INFO, &card->dev->dev, + "memory already initialized\n"); card->init_size = card->mm_size; } @@ -1062,7 +1085,7 @@ static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_i failed_magic: iounmap(card->csr_remap); failed_remap_csr: - release_mem_region(card->csr_base, card->csr_len); + pci_release_regions(dev); failed_req_csr: return ret; @@ -1077,9 +1100,8 @@ static void mm_pci_remove(struct pci_dev *dev) struct cardinfo *card = pci_get_drvdata(dev); tasklet_kill(&card->tasklet); + free_irq(dev->irq, card); iounmap(card->csr_remap); - release_mem_region(card->csr_base, card->csr_len); - free_irq(card->irq, card); if (card->mm_pages[0].desc) pci_free_consistent(card->dev, PAGE_SIZE*2, @@ -1090,6 +1112,9 @@ static void mm_pci_remove(struct pci_dev *dev) card->mm_pages[1].desc, card->mm_pages[1].page_dma); blk_cleanup_queue(card->queue); + + pci_release_regions(dev); + pci_disable_device(dev); } static const struct pci_device_id mm_pci_ids[] = { @@ -1109,11 +1134,12 @@ static const struct pci_device_id mm_pci_ids[] = { MODULE_DEVICE_TABLE(pci, mm_pci_ids); static struct pci_driver mm_pci_driver = { - .name = "umem", - .id_table = mm_pci_ids, - .probe = mm_pci_probe, - .remove = mm_pci_remove, + .name = DRIVER_NAME, + .id_table = mm_pci_ids, + .probe = mm_pci_probe, + .remove = mm_pci_remove, }; + /* ----------------------------------------------------------------------------------- -- mm_init @@ -1125,13 +1151,11 @@ static int __init mm_init(void) int retval, i; int err; - printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n"); - retval = pci_register_driver(&mm_pci_driver); if (retval) return -ENOMEM; - err = major_nr = register_blkdev(0, "umem"); + err = major_nr = register_blkdev(0, DRIVER_NAME); if (err < 0) { pci_unregister_driver(&mm_pci_driver); return -EIO; @@ -1157,13 +1181,13 @@ static int __init mm_init(void) } init_battery_timer(); - printk("MM: desc_per_page = %ld\n", DESC_PER_PAGE); + printk(KERN_INFO "MM: desc_per_page = %ld\n", DESC_PER_PAGE); /* printk("mm_init: Done. 10-19-01 9:00\n"); */ return 0; out: pci_unregister_driver(&mm_pci_driver); - unregister_blkdev(major_nr, "umem"); + unregister_blkdev(major_nr, DRIVER_NAME); while (i--) put_disk(mm_gendisk[i]); return -ENOMEM; @@ -1186,7 +1210,7 @@ static void __exit mm_cleanup(void) pci_unregister_driver(&mm_pci_driver); - unregister_blkdev(major_nr, "umem"); + unregister_blkdev(major_nr, DRIVER_NAME); } module_init(mm_init);