| Start/ | End/ | |||
| True | False | - | Line | Source |
| 1 | /* | |||
| 2 | * Block driver for media (i.e., flash cards) | |||
| 3 | * | |||
| 4 | * Copyright 2002 Hewlett-Packard Company | |||
| 5 | * | |||
| 6 | * Use consistent with the GNU GPL is permitted, | |||
| 7 | * provided that this copyright notice is | |||
| 8 | * preserved in its entirety in all copies and derived works. | |||
| 9 | * | |||
| 10 | * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, | |||
| 11 | * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS | |||
| 12 | * FITNESS FOR ANY PARTICULAR PURPOSE. | |||
| 13 | * | |||
| 14 | * Many thanks to Alessandro Rubini and Jonathan Corbet! | |||
| 15 | * | |||
| 16 | * Author: Andrew Christian | |||
| 17 | * 28 May 2002 | |||
| 18 | */ | |||
| 19 | #include <linux/moduleparam.h> | |||
| 20 | #include <linux/module.h> | |||
| 21 | #include <linux/init.h> | |||
| 22 | ||||
| 23 | #include <linux/sched.h> | |||
| 24 | #include <linux/kernel.h> | |||
| 25 | #include <linux/fs.h> | |||
| 26 | #include <linux/errno.h> | |||
| 27 | #include <linux/hdreg.h> | |||
| 28 | #include <linux/kdev_t.h> | |||
| 29 | #include <linux/blkdev.h> | |||
| 30 | #include <linux/devfs_fs_kernel.h> | |||
| 31 | #include <linux/mutex.h> | |||
| 32 | ||||
| 33 | #include <linux/mmc/card.h> | |||
| 34 | #include <linux/mmc/protocol.h> | |||
| 35 | ||||
| 36 | #include <asm/system.h> | |||
| 37 | #include <asm/uaccess.h> | |||
| 38 | ||||
| 39 | #include "mmc_queue.h" | |||
| 40 | ||||
| 41 | /* | |||
| 42 | * max 8 partitions per card | |||
| 43 | */ | |||
| 44 | #define MMC_SHIFT 3 | |||
| 45 | ||||
| 46 | static int major; | |||
| 47 | ||||
| 48 | /* | |||
| 49 | * There is one mmc_blk_data per slot. | |||
| 50 | */ | |||
| 51 | struct mmc_blk_data { | |||
| 52 | spinlock_t lock; | |||
| 53 | struct gendisk *disk; | |||
| 54 | struct mmc_queue queue; | |||
| 55 | ||||
| 56 | unsigned int usage; | |||
| 57 | unsigned int block_bits; | |||
| 58 | unsigned int read_only; | |||
| 59 | }; | |||
| 60 | ||||
| 61 | static DEFINE_MUTEX(open_lock); | |||
| 62 | ||||
| 0 | 0 | - | 63 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) |
| 64 | { | |||
| 65 | struct mmc_blk_data *md; | |||
| 66 | ||||
| 67 | mutex_lock(&open_lock); | |||
| 68 | md = disk->private_data; | |||
| 0 | 0 | - | 69 | if (md && md->usage == 0) |
| 0 | - | 69 | T && T | |
| 0 | - | 69 | T && F | |
| 0 | - | 69 | F && _ | |
| 70 | md = NULL; | |||
| 0 | 0 | - | 71 | if (md) |
| 72 | md->usage++; | |||
| 73 | mutex_unlock(&open_lock); | |||
| 74 | ||||
| 0 | - | 75 | return md; | |
| 76 | } | |||
| 77 | ||||
| 0 | 0 | - | 78 | static void mmc_blk_put(struct mmc_blk_data *md) |
| 79 | { | |||
| 80 | mutex_lock(&open_lock); | |||
| 81 | md->usage--; | |||
| 0 | 0 | - | 82 | if (md->usage == 0) { |
| 83 | put_disk(md->disk); | |||
| 84 | mmc_cleanup_queue(&md->queue); | |||
| 85 | kfree(md); | |||
| 86 | } | |||
| 87 | mutex_unlock(&open_lock); | |||
| 88 | } | |||
| 89 | ||||
| 0 | 0 | - | 90 | static int mmc_blk_open(struct inode *inode, struct file *filp) |
| 91 | { | |||
| 92 | struct mmc_blk_data *md; | |||
| 93 | int ret = -ENXIO; | |||
| 94 | ||||
| 95 | md = mmc_blk_get(inode->i_bdev->bd_disk); | |||
| 0 | 0 | - | 96 | if (md) { |
| 0 | 0 | - | 97 | if (md->usage == 2) |
| 98 | check_disk_change(inode->i_bdev); | |||
| 99 | ret = 0; | |||
| 100 | ||||
| 0 | 0 | - | 101 | if ((filp->f_mode & FMODE_WRITE) && md->read_only) |
| 0 | - | 101 | (T) && T | |
| 0 | - | 101 | (T) && F | |
| 0 | - | 101 | (F) && _ | |
| 102 | ret = -EROFS; | |||
| 103 | } | |||
| 104 | ||||
| 0 | - | 105 | return ret; | |
| 106 | } | |||
| 107 | ||||
| 0 | 0 | - | 108 | static int mmc_blk_release(struct inode *inode, struct file *filp) |
| 109 | { | |||
| 110 | struct mmc_blk_data *md = inode->i_bdev->bd_disk->private_data; | |||
| 111 | ||||
| 112 | mmc_blk_put(md); | |||
| 0 | - | 113 | return 0; | |
| 114 | } | |||
| 115 | ||||
| 116 | static int | |||
| 0 | 0 | - | 117 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| 118 | { | |||
| 119 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); | |||
| 120 | geo->heads = 4; | |||
| 121 | geo->sectors = 16; | |||
| 0 | - | 122 | return 0; | |
| 123 | } | |||
| 124 | ||||
| 125 | static struct block_device_operations mmc_bdops = { | |||
| 126 | .open = mmc_blk_open, | |||
| 127 | .release = mmc_blk_release, | |||
| 128 | .getgeo = mmc_blk_getgeo, | |||
| 129 | .owner = THIS_MODULE, | |||
| 130 | }; | |||
| 131 | ||||
| 132 | struct mmc_blk_request { | |||
| 133 | struct mmc_request mrq; | |||
| 134 | struct mmc_command cmd; | |||
| 135 | struct mmc_command stop; | |||
| 136 | struct mmc_data data; | |||
| 137 | }; | |||
| 138 | ||||
| 0 | 0 | - | 139 | static int mmc_blk_prep_rq(struct mmc_queue *mq, struct request *req) |
| 140 | { | |||
| 141 | struct mmc_blk_data *md = mq->data; | |||
| 142 | int stat = BLKPREP_OK; | |||
| 143 | ||||
| 144 | /* | |||
| 145 | * If we have no device, we haven't finished initialising. | |||
| 146 | */ | |||
| 0 | 0 | - | 147 | if (!md || !mq->card) { |
| 0 | - | 147 | T || _ | |
| 0 | - | 147 | F || T | |
| 0 | - | 147 | F || F | |
| 148 | printk(KERN_ERR "%s: killing request - no device/host\n", | |||
| 149 | req->rq_disk->disk_name); | |||
| 150 | stat = BLKPREP_KILL; | |||
| 151 | } | |||
| 152 | ||||
| 0 | - | 153 | return stat; | |
| 154 | } | |||
| 155 | ||||
| 0 | 0 | - | 156 | static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) |
| 157 | { | |||
| 158 | struct mmc_blk_data *md = mq->data; | |||
| 159 | struct mmc_card *card = md->queue.card; | |||
| 160 | int ret; | |||
| 161 | ||||
| 0 | 0 | - | 162 | if (mmc_card_claim_host(card)) |
| 0 | - | 163 | goto cmd_err; | |
| 164 | ||||
| 165 | do { | |||
| 166 | struct mmc_blk_request brq; | |||
| 167 | struct mmc_command cmd; | |||
| 168 | ||||
| 169 | memset(&brq, 0, sizeof(struct mmc_blk_request)); | |||
| 170 | brq.mrq.cmd = &brq.cmd; | |||
| 171 | brq.mrq.data = &brq.data; | |||
| 172 | ||||
| 173 | brq.cmd.arg = req->sector << 9; | |||
| 174 | brq.cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; | |||
| 175 | brq.data.timeout_ns = card->csd.tacc_ns * 10; | |||
| 176 | brq.data.timeout_clks = card->csd.tacc_clks * 10; | |||
| 177 | brq.data.blksz_bits = md->block_bits; | |||
| 178 | brq.data.blocks = req->nr_sectors >> (md->block_bits - 9); | |||
| 179 | brq.stop.opcode = MMC_STOP_TRANSMISSION; | |||
| 180 | brq.stop.arg = 0; | |||
| 181 | brq.stop.flags = MMC_RSP_R1B | MMC_CMD_AC; | |||
| 182 | ||||
| 0 | 0 | - | 183 | if (rq_data_dir(req) == READ) { |
| 184 | brq.cmd.opcode = brq.data.blocks > 1 ? MMC_READ_MULTIPLE_BLOCK : MMC_READ_SINGLE_BLOCK; | |||
| 0 | 0 | - | 184 | ternary-?: brq . data . blocks > 1 |
| 185 | brq.data.flags |= MMC_DATA_READ; | |||
| 186 | } else { | |||
| 187 | brq.cmd.opcode = MMC_WRITE_BLOCK; | |||
| 188 | brq.data.flags |= MMC_DATA_WRITE; | |||
| 189 | brq.data.blocks = 1; | |||
| 190 | } | |||
| 191 | ||||
| 0 | 0 | - | 192 | if (brq.data.blocks > 1) { |
| 193 | brq.data.flags |= MMC_DATA_MULTI; | |||
| 194 | brq.mrq.stop = &brq.stop; | |||
| 195 | } else { | |||
| 196 | brq.mrq.stop = NULL; | |||
| 197 | } | |||
| 198 | ||||
| 199 | brq.data.sg = mq->sg; | |||
| 200 | brq.data.sg_len = blk_rq_map_sg(req->q, req, brq.data.sg); | |||
| 201 | ||||
| 202 | mmc_wait_for_req(card->host, &brq.mrq); | |||
| 0 | 0 | - | 203 | if (brq.cmd.error) { |
| 204 | printk(KERN_ERR "%s: error %d sending read/write command\n", | |||
| 205 | req->rq_disk->disk_name, brq.cmd.error); | |||
| 0 | - | 206 | goto cmd_err; | |
| 207 | } | |||
| 208 | ||||
| 0 | 0 | - | 209 | if (brq.data.error) { |
| 210 | printk(KERN_ERR "%s: error %d transferring data\n", | |||
| 211 | req->rq_disk->disk_name, brq.data.error); | |||
| 0 | - | 212 | goto cmd_err; | |
| 213 | } | |||
| 214 | ||||
| 0 | 0 | - | 215 | if (brq.stop.error) { |
| 216 | printk(KERN_ERR "%s: error %d sending stop command\n", | |||
| 217 | req->rq_disk->disk_name, brq.stop.error); | |||
| 0 | - | 218 | goto cmd_err; | |
| 219 | } | |||
| 220 | ||||
| 221 | do { | |||
| 222 | int err; | |||
| 223 | ||||
| 224 | cmd.opcode = MMC_SEND_STATUS; | |||
| 225 | cmd.arg = card->rca << 16; | |||
| 226 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |||
| 227 | err = mmc_wait_for_cmd(card->host, &cmd, 5); | |||
| 0 | 0 | - | 228 | if (err) { |
| 229 | printk(KERN_ERR "%s: error %d requesting status\n", | |||
| 230 | req->rq_disk->disk_name, err); | |||
| 0 | - | 231 | goto cmd_err; | |
| 232 | } | |||
| 0 | 0 | - | 233 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA)); |
| 234 | ||||
| 235 | #if 0 | |||
| 236 | if (cmd.resp[0] & ~0x00000900) | |||
| 237 | printk(KERN_ERR "%s: status = %08x\n", | |||
| 238 | req->rq_disk->disk_name, cmd.resp[0]); | |||
| 239 | if (mmc_decode_status(cmd.resp)) | |||
| 240 | goto cmd_err; | |||
| 241 | #endif | |||
| 242 | ||||
| 243 | /* | |||
| 244 | * A block was successfully transferred. | |||
| 245 | */ | |||
| 246 | spin_lock_irq(&md->lock); | |||
| 246 | do | |||
| 246 | do | |||
| 0 | 0 | - | 246 | do-while (0) |
| 0 | 0 | - | 246 | do-while (0) |
| 0 | 0 | - | 246 | do-while (0) |
| 247 | ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered); | |||
| 0 | 0 | - | 248 | if (!ret) { |
| 249 | /* | |||
| 250 | * The whole request completed successfully. | |||
| 251 | */ | |||
| 252 | add_disk_randomness(req->rq_disk); | |||
| 253 | blkdev_dequeue_request(req); | |||
| 254 | end_that_request_last(req, 1); | |||
| 255 | } | |||
| 256 | spin_unlock_irq(&md->lock); | |||
| 256 | do | |||
| 256 | do | |||
| 0 | 0 | - | 256 | do-while (0) |
| 0 | 0 | - | 256 | do-while (0) |
| 0 | 0 | - | 256 | do-while (0) |
| 0 | 0 | - | 257 | } while (ret); |
| 258 | ||||
| 259 | mmc_card_release_host(card); | |||
| 260 | ||||
| 0 | - | 261 | return 1; | |
| 262 | ||||
| 263 | cmd_err: | |||
| 264 | mmc_card_release_host(card); | |||
| 265 | ||||
| 266 | /* | |||
| 267 | * This is a little draconian, but until we get proper | |||
| 268 | * error handling sorted out here, its the best we can | |||
| 269 | * do - especially as some hosts have no idea how much | |||
| 270 | * data was transferred before the error occurred. | |||
| 271 | */ | |||
| 272 | spin_lock_irq(&md->lock); | |||
| 272 | do | |||
| 272 | do | |||
| 0 | 0 | - | 272 | do-while (0) |
| 0 | 0 | - | 272 | do-while (0) |
| 0 | 0 | - | 272 | do-while (0) |
| 273 | do { | |||
| 274 | ret = end_that_request_chunk(req, 0, | |||
| 275 | req->current_nr_sectors << 9); | |||
| 0 | 0 | - | 276 | } while (ret); |
| 277 | ||||
| 278 | add_disk_randomness(req->rq_disk); | |||
| 279 | blkdev_dequeue_request(req); | |||
| 280 | end_that_request_last(req, 0); | |||
| 281 | spin_unlock_irq(&md->lock); | |||
| 281 | do | |||
| 281 | do | |||
| 0 | 0 | - | 281 | do-while (0) |
| 0 | 0 | - | 281 | do-while (0) |
| 0 | 0 | - | 281 | do-while (0) |
| 282 | ||||
| 0 | - | 283 | return 0; | |
| 284 | } | |||
| 285 | ||||
| 286 | #define MMC_NUM_MINORS (256 >> MMC_SHIFT) | |||
| 287 | ||||
| 288 | static unsigned long dev_use[MMC_NUM_MINORS/(8*sizeof(unsigned long))]; | |||
| 289 | ||||
| 0 | 0 | - | 290 | static inline int mmc_blk_readonly(struct mmc_card *card) |
| 291 | { | |||
| 292 | return mmc_card_readonly(card) || | |||
| 0 | - | 293 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
| 294 | } | |||
| 295 | ||||
| 0 | 0 | - | 296 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) |
| 297 | { | |||
| 298 | struct mmc_blk_data *md; | |||
| 299 | int devidx, ret; | |||
| 300 | ||||
| 301 | devidx = find_first_zero_bit(dev_use, MMC_NUM_MINORS); | |||
| 0 | 0 | - | 301 | ternary-?: __builtin_constant_p ( ( 256 >> 3 ).. |
| 0 | 0 | - | 302 | if (devidx >= MMC_NUM_MINORS) |
| 0 | - | 303 | return ERR_PTR(-ENOSPC); | |
| 304 | __set_bit(devidx, dev_use); | |||
| 305 | ||||
| 306 | md = kmalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); | |||
| 0 | 0 | - | 307 | if (!md) { |
| 308 | ret = -ENOMEM; | |||
| 0 | - | 309 | goto out; | |
| 310 | } | |||
| 311 | ||||
| 312 | memset(md, 0, sizeof(struct mmc_blk_data)); | |||
| 313 | ||||
| 314 | /* | |||
| 315 | * Set the read-only status based on the supported commands | |||
| 316 | * and the write protect switch. | |||
| 317 | */ | |||
| 318 | md->read_only = mmc_blk_readonly(card); | |||
| 319 | ||||
| 320 | /* | |||
| 321 | * Figure out a workable block size. MMC cards have: | |||
| 322 | * - two block sizes, one for read and one for write. | |||
| 323 | * - may support partial reads and/or writes | |||
| 324 | * (allows block sizes smaller than specified) | |||
| 325 | */ | |||
| 326 | md->block_bits = card->csd.read_blkbits; | |||
| 0 | 0 | - | 327 | if (card->csd.write_blkbits != card->csd.read_blkbits) { |
| 328 | if (card->csd.write_blkbits < card->csd.read_blkbits && | |||
| 0 | 0 | - | 329 | card->csd.read_partial) { |
| 0 | - | 329 | T && T | |
| 0 | - | 329 | T && F | |
| 0 | - | 329 | F && _ | |
| 330 | /* | |||
| 331 | * write block size is smaller than read block | |||
| 332 | * size, but we support partial reads, so choose | |||
| 333 | * the smaller write block size. | |||
| 334 | */ | |||
| 335 | md->block_bits = card->csd.write_blkbits; | |||
| 336 | } else if (card->csd.write_blkbits > card->csd.read_blkbits && | |||
| 0 | 0 | - | 337 | card->csd.write_partial) { |
| 0 | - | 337 | T && T | |
| 0 | - | 337 | T && F | |
| 0 | - | 337 | F && _ | |
| 338 | /* | |||
| 339 | * read block size is smaller than write block | |||
| 340 | * size, but we support partial writes. Use read | |||
| 341 | * block size. | |||
| 342 | */ | |||
| 343 | } else { | |||
| 344 | /* | |||
| 345 | * We don't support this configuration for writes. | |||
| 346 | */ | |||
| 347 | printk(KERN_ERR "%s: unable to select block size for " | |||
| 348 | "writing (rb%u wb%u rp%u wp%u)\n", | |||
| 349 | md->disk->disk_name, | |||
| 350 | 1 << card->csd.read_blkbits, | |||
| 351 | 1 << card->csd.write_blkbits, | |||
| 352 | card->csd.read_partial, | |||
| 353 | card->csd.write_partial); | |||
| 354 | md->read_only = 1; | |||
| 355 | } | |||
| 356 | } | |||
| 357 | ||||
| 358 | /* | |||
| 359 | * Refuse to allow block sizes smaller than 512 bytes. | |||
| 360 | */ | |||
| 0 | 0 | - | 361 | if (md->block_bits < 9) { |
| 362 | printk(KERN_ERR "%s: unable to support block size %u\n", | |||
| 363 | mmc_card_id(card), 1 << md->block_bits); | |||
| 364 | ret = -EINVAL; | |||
| 0 | - | 365 | goto err_kfree; | |
| 366 | } | |||
| 367 | ||||
| 368 | md->disk = alloc_disk(1 << MMC_SHIFT); | |||
| 0 | 0 | - | 369 | if (md->disk == NULL) { |
| 370 | ret = -ENOMEM; | |||
| 0 | - | 371 | goto err_kfree; | |
| 372 | } | |||
| 373 | ||||
| 374 | spin_lock_init(&md->lock); | |||
| 0 | 0 | - | 374 | do-while (0) |
| 375 | md->usage = 1; | |||
| 376 | ||||
| 377 | ret = mmc_init_queue(&md->queue, card, &md->lock); | |||
| 0 | 0 | - | 378 | if (ret) |
| 0 | - | 379 | goto err_putdisk; | |
| 380 | ||||
| 381 | md->queue.prep_fn = mmc_blk_prep_rq; | |||
| 382 | md->queue.issue_fn = mmc_blk_issue_rq; | |||
| 383 | md->queue.data = md; | |||
| 384 | ||||
| 385 | md->disk->major = major; | |||
| 386 | md->disk->first_minor = devidx << MMC_SHIFT; | |||
| 387 | md->disk->fops = &mmc_bdops; | |||
| 388 | md->disk->private_data = md; | |||
| 389 | md->disk->queue = md->queue.queue; | |||
| 390 | md->disk->driverfs_dev = &card->dev; | |||
| 391 | ||||
| 392 | /* | |||
| 393 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |||
| 394 | * | |||
| 395 | * - be set for removable media with permanent block devices | |||
| 396 | * - be unset for removable block devices with permanent media | |||
| 397 | * | |||
| 398 | * Since MMC block devices clearly fall under the second | |||
| 399 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |||
| 400 | * should use the block device creation/destruction hotplug | |||
| 401 | * messages to tell when the card is present. | |||
| 402 | */ | |||
| 403 | ||||
| 404 | sprintf(md->disk->disk_name, "mmcblk%d", devidx); | |||
| 405 | sprintf(md->disk->devfs_name, "mmc/blk%d", devidx); | |||
| 406 | ||||
| 407 | blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits); | |||
| 408 | ||||
| 409 | /* | |||
| 410 | * The CSD capacity field is in units of read_blkbits. | |||
| 411 | * set_capacity takes units of 512 bytes. | |||
| 412 | */ | |||
| 413 | set_capacity(md->disk, card->csd.capacity << (card->csd.read_blkbits - 9)); | |||
| 0 | - | 414 | return md; | |
| 415 | ||||
| 416 | err_putdisk: | |||
| 417 | put_disk(md->disk); | |||
| 418 | err_kfree: | |||
| 419 | kfree(md); | |||
| 420 | out: | |||
| 0 | - | 421 | return ERR_PTR(ret); | |
| 422 | } | |||
| 423 | ||||
| 424 | static int | |||
| 0 | 0 | - | 425 | mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) |
| 426 | { | |||
| 427 | struct mmc_command cmd; | |||
| 428 | int err; | |||
| 429 | ||||
| 430 | mmc_card_claim_host(card); | |||
| 431 | cmd.opcode = MMC_SET_BLOCKLEN; | |||
| 432 | cmd.arg = 1 << md->block_bits; | |||
| 433 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |||
| 434 | err = mmc_wait_for_cmd(card->host, &cmd, 5); | |||
| 435 | mmc_card_release_host(card); | |||
| 436 | ||||
| 0 | 0 | - | 437 | if (err) { |
| 438 | printk(KERN_ERR "%s: unable to set block size to %d: %d\n", | |||
| 439 | md->disk->disk_name, cmd.arg, err); | |||
| 0 | - | 440 | return -EINVAL; | |
| 441 | } | |||
| 442 | ||||
| 0 | - | 443 | return 0; | |
| 444 | } | |||
| 445 | ||||
| 0 | 0 | - | 446 | static int mmc_blk_probe(struct mmc_card *card) |
| 447 | { | |||
| 448 | struct mmc_blk_data *md; | |||
| 449 | int err; | |||
| 450 | ||||
| 451 | /* | |||
| 452 | * Check that the card supports the command class(es) we need. | |||
| 453 | */ | |||
| 0 | 0 | - | 454 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) |
| 0 | - | 455 | return -ENODEV; | |
| 456 | ||||
| 457 | md = mmc_blk_alloc(card); | |||
| 0 | 0 | - | 458 | if (IS_ERR(md)) |
| 0 | - | 459 | return PTR_ERR(md); | |
| 460 | ||||
| 461 | err = mmc_blk_set_blksize(md, card); | |||
| 0 | 0 | - | 462 | if (err) |
| 0 | - | 463 | goto out; | |
| 464 | ||||
| 465 | printk(KERN_INFO "%s: %s %s %lluKiB %s\n", | |||
| 466 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), | |||
| 467 | (unsigned long long)(get_capacity(md->disk) >> 1), | |||
| 468 | md->read_only ? "(ro)" : ""); | |||
| 0 | 0 | - | 468 | ternary-?: md -> read_only |
| 469 | ||||
| 470 | mmc_set_drvdata(card, md); | |||
| 471 | add_disk(md->disk); | |||
| 0 | - | 472 | return 0; | |
| 473 | ||||
| 474 | out: | |||
| 475 | mmc_blk_put(md); | |||
| 476 | ||||
| 0 | - | 477 | return err; | |
| 478 | } | |||
| 479 | ||||
| 0 | 0 | - | 480 | static void mmc_blk_remove(struct mmc_card *card) |
| 481 | { | |||
| 482 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |||
| 483 | ||||
| 0 | 0 | - | 484 | if (md) { |
| 485 | int devidx; | |||
| 486 | ||||
| 487 | del_gendisk(md->disk); | |||
| 488 | ||||
| 489 | /* | |||
| 490 | * I think this is needed. | |||
| 491 | */ | |||
| 492 | md->disk->queue = NULL; | |||
| 493 | ||||
| 494 | devidx = md->disk->first_minor >> MMC_SHIFT; | |||
| 495 | __clear_bit(devidx, dev_use); | |||
| 496 | ||||
| 497 | mmc_blk_put(md); | |||
| 498 | } | |||
| 499 | mmc_set_drvdata(card, NULL); | |||
| 500 | } | |||
| 501 | ||||
| 502 | #ifdef CONFIG_PM | |||
| 0 | 0 | - | 503 | static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state) |
| 504 | { | |||
| 505 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |||
| 506 | ||||
| 0 | 0 | - | 507 | if (md) { |
| 508 | mmc_queue_suspend(&md->queue); | |||
| 509 | } | |||
| 0 | - | 510 | return 0; | |
| 511 | } | |||
| 512 | ||||
| 0 | 0 | - | 513 | static int mmc_blk_resume(struct mmc_card *card) |
| 514 | { | |||
| 515 | struct mmc_blk_data *md = mmc_get_drv | |||