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Commit 621c2559 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.infradead.org/mtd-2.6 

* git://git.infradead.org/mtd-2.6:
  mtd: fix timeout in M25P80 driver
  mtd: Bug in m25p80.c during whole-chip erase
  mtd: expose subpage size via sysfs
  mtd: mtd in mtd_release is unused without CONFIG_MTD_CHAR
parents d9d05fda cd1a6de7

drivers/mtd/devices/m25p80.c

+14 −12
Original line number Diff line number Diff line
@@ -54,7 +54,7 @@ 
#define	SR_SRWD			0x80	/* SR write protect */



/* Define max times to check status register before we give up. */

#define	MAX_READY_WAIT_COUNT	100000

#define	MAX_READY_WAIT_JIFFIES	(10 * HZ)	/* eg. M25P128 specs 6s max sector erase */

#define	CMD_SIZE		4



#ifdef CONFIG_M25PXX_USE_FAST_READ
@@ -139,20 +139,20 @@ static inline int write_enable(struct m25p *flash) 
 */

static int wait_till_ready(struct m25p *flash)

{

	int count;

	unsigned long deadline;

	int sr;



	/* one chip guarantees max 5 msec wait here after page writes,

	 * but potentially three seconds (!) after page erase.

	 */

	for (count = 0; count < MAX_READY_WAIT_COUNT; count++) {

	deadline = jiffies + MAX_READY_WAIT_JIFFIES;



	do {

		if ((sr = read_sr(flash)) < 0)

			break;

		else if (!(sr & SR_WIP))

			return 0;



		/* REVISIT sometimes sleeping would be best */

	}

		cond_resched();



	} while (!time_after_eq(jiffies, deadline));



	return 1;

}
@@ -246,10 +246,12 @@ static int m25p80_erase(struct mtd_info *mtd, struct erase_info *instr) 
	mutex_lock(&flash->lock);



	/* whole-chip erase? */

	if (len == flash->mtd.size && erase_chip(flash)) {

	if (len == flash->mtd.size) {

		if (erase_chip(flash)) {

			instr->state = MTD_ERASE_FAILED;

			mutex_unlock(&flash->lock);

			return -EIO;

		}



	/* REVISIT in some cases we could speed up erasing large regions

	 * by using OPCODE_SE instead of OPCODE_BE_4K.  We may have set up

drivers/mtd/mtdcore.c

+15 −3
Original line number Diff line number Diff line
@@ -48,11 +48,11 @@ static LIST_HEAD(mtd_notifiers); 
 */

static void mtd_release(struct device *dev)

{

	struct mtd_info *mtd = dev_to_mtd(dev);

	dev_t index = MTD_DEVT(dev_to_mtd(dev)->index);



	/* remove /dev/mtdXro node if needed */

	if (MTD_DEVT(mtd->index))

		device_destroy(mtd_class, MTD_DEVT(mtd->index) + 1);

	if (index)

		device_destroy(mtd_class, index + 1);

}



static ssize_t mtd_type_show(struct device *dev,
@@ -132,6 +132,17 @@ static ssize_t mtd_writesize_show(struct device *dev, 
}

static DEVICE_ATTR(writesize, S_IRUGO, mtd_writesize_show, NULL);



static ssize_t mtd_subpagesize_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct mtd_info *mtd = dev_to_mtd(dev);

	unsigned int subpagesize = mtd->writesize >> mtd->subpage_sft;



	return snprintf(buf, PAGE_SIZE, "%u\n", subpagesize);



}

static DEVICE_ATTR(subpagesize, S_IRUGO, mtd_subpagesize_show, NULL);



static ssize_t mtd_oobsize_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{
@@ -169,6 +180,7 @@ static struct attribute *mtd_attrs[] = { 
	&dev_attr_size.attr,

	&dev_attr_erasesize.attr,

	&dev_attr_writesize.attr,

	&dev_attr_subpagesize.attr,

	&dev_attr_oobsize.attr,

	&dev_attr_numeraseregions.attr,

	&dev_attr_name.attr,