mtdcore.c (c42c2710d64381fd48d36b278e0744aa683d93fe) mtdcore.c (07fd2f871c5e3dfb8ff5eb9c4b44fdb4cf1aeff5)
1/*
2 * Core registration and callback routines for MTD
3 * drivers and users.
4 *
5 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>
6 * Copyright © 2006 Red Hat UK Limited
7 *
8 * This program is free software; you can redistribute it and/or modify

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527 }
528
529out_error:
530 mutex_unlock(&mtd_table_mutex);
531 return ret;
532}
533
534static int mtd_add_device_partitions(struct mtd_info *mtd,
1/*
2 * Core registration and callback routines for MTD
3 * drivers and users.
4 *
5 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>
6 * Copyright © 2006 Red Hat UK Limited
7 *
8 * This program is free software; you can redistribute it and/or modify

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527 }
528
529out_error:
530 mutex_unlock(&mtd_table_mutex);
531 return ret;
532}
533
534static int mtd_add_device_partitions(struct mtd_info *mtd,
535 const struct mtd_partition *real_parts,
536 int nbparts)
535 struct mtd_partitions *parts)
537{
536{
537 const struct mtd_partition *real_parts = parts->parts;
538 int nbparts = parts->nr_parts;
538 int ret;
539
540 if (nbparts == 0 || IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER)) {
541 ret = add_mtd_device(mtd);
542 if (ret)
543 return ret;
544 }
545

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583 *
584 * Returns zero in case of success and a negative error code in case of failure.
585 */
586int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types,
587 struct mtd_part_parser_data *parser_data,
588 const struct mtd_partition *parts,
589 int nr_parts)
590{
539 int ret;
540
541 if (nbparts == 0 || IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER)) {
542 ret = add_mtd_device(mtd);
543 if (ret)
544 return ret;
545 }
546

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584 *
585 * Returns zero in case of success and a negative error code in case of failure.
586 */
587int mtd_device_parse_register(struct mtd_info *mtd, const char * const *types,
588 struct mtd_part_parser_data *parser_data,
589 const struct mtd_partition *parts,
590 int nr_parts)
591{
592 struct mtd_partitions parsed;
591 int ret;
593 int ret;
592 const struct mtd_partition *real_parts = NULL;
593
594
594 ret = parse_mtd_partitions(mtd, types, &real_parts, parser_data);
595 if (ret <= 0 && nr_parts && parts) {
596 real_parts = parts;
597 ret = nr_parts;
598 }
599 /* Didn't come up with either parsed OR fallback partitions */
600 if (ret < 0) {
595 memset(&parsed, 0, sizeof(parsed));
596
597 ret = parse_mtd_partitions(mtd, types, &parsed, parser_data);
598 if ((ret < 0 || parsed.nr_parts == 0) && parts && nr_parts) {
599 /* Fall back to driver-provided partitions */
600 parsed = (struct mtd_partitions){
601 .parts = parts,
602 .nr_parts = nr_parts,
603 };
604 } else if (ret < 0) {
605 /* Didn't come up with parsed OR fallback partitions */
601 pr_info("mtd: failed to find partitions; one or more parsers reports errors (%d)\n",
602 ret);
603 /* Don't abort on errors; we can still use unpartitioned MTD */
606 pr_info("mtd: failed to find partitions; one or more parsers reports errors (%d)\n",
607 ret);
608 /* Don't abort on errors; we can still use unpartitioned MTD */
604 ret = 0;
609 memset(&parsed, 0, sizeof(parsed));
605 }
606
610 }
611
607 ret = mtd_add_device_partitions(mtd, real_parts, ret);
612 ret = mtd_add_device_partitions(mtd, &parsed);
608 if (ret)
609 goto out;
610
611 /*
612 * FIXME: some drivers unfortunately call this function more than once.
613 * So we have to check if we've already assigned the reboot notifier.
614 *
615 * Generally, we can make multiple calls work for most cases, but it

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620 "MTD already registered\n");
621 if (mtd->_reboot && !mtd->reboot_notifier.notifier_call) {
622 mtd->reboot_notifier.notifier_call = mtd_reboot_notifier;
623 register_reboot_notifier(&mtd->reboot_notifier);
624 }
625
626out:
627 /* Cleanup any parsed partitions */
613 if (ret)
614 goto out;
615
616 /*
617 * FIXME: some drivers unfortunately call this function more than once.
618 * So we have to check if we've already assigned the reboot notifier.
619 *
620 * Generally, we can make multiple calls work for most cases, but it

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625 "MTD already registered\n");
626 if (mtd->_reboot && !mtd->reboot_notifier.notifier_call) {
627 mtd->reboot_notifier.notifier_call = mtd_reboot_notifier;
628 register_reboot_notifier(&mtd->reboot_notifier);
629 }
630
631out:
632 /* Cleanup any parsed partitions */
628 if (real_parts != parts)
629 kfree(real_parts);
633 if (parsed.parser)
634 kfree(parsed.parts);
630 return ret;
631}
632EXPORT_SYMBOL_GPL(mtd_device_parse_register);
633
634/**
635 * mtd_device_unregister - unregister an existing MTD device.
636 *
637 * @master: the MTD device to unregister. This will unregister both the master

--- 704 unchanged lines hidden --- 		635 return ret;
636}
637EXPORT_SYMBOL_GPL(mtd_device_parse_register);
638
639/**
640 * mtd_device_unregister - unregister an existing MTD device.
641 *
642 * @master: the MTD device to unregister. This will unregister both the master

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