From: Fabian Frederick Date: Thu, 6 Mar 2014 10:04:22 +0000 (+0800) Subject: mtd: block2mtd: check device size X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ea6d833a3fddcd1d60414d48f34c7f4fbe88608f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git mtd: block2mtd: check device size fixme applied : check device size is a multiple of erasesize. Signed-off-by: Fabian Frederick Signed-off-by: Brian Norris --- diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c index 3e12234b7565..66f0405f7e53 100644 --- a/drivers/mtd/devices/block2mtd.c +++ b/drivers/mtd/devices/block2mtd.c @@ -209,7 +209,6 @@ static void block2mtd_free_device(struct block2mtd_dev *dev) } -/* FIXME: ensure that mtd->size % erase_size == 0 */ static struct block2mtd_dev *add_device(char *devname, int erase_size) { const fmode_t mode = FMODE_READ | FMODE_WRITE | FMODE_EXCL; @@ -249,6 +248,11 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size) goto err_free_block2mtd; } + if ((long)dev->blkdev->bd_inode->i_size % erase_size) { + pr_err("erasesize must be a divisor of device size\n"); + goto err_free_block2mtd; + } + mutex_init(&dev->write_mutex); /* Setup the MTD structure */