Merge tag 'linux-can-next-for-3.15-20140212' of git://gitorious.org/linux-can/linux...

[firefly-linux-kernel-4.4.55.git] / drivers / mtd / mtdconcat.c

diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index 5c7eb69c4ed987f8e80acca6ef7d2664b6fb300e..b9000563b9f4311d63ffdfe66ba5166eb158b482 100644 (file)
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -72,8 +72,6 @@ concat_read(struct mtd_info *mtd, loff_t from, size_t len,
        int ret = 0, err;
        int i;
 
-       *retlen = 0;
-
        for (i = 0; i < concat->num_subdev; i++) {
                struct mtd_info *subdev = concat->subdev[i];
                size_t size, retsize;
@@ -126,11 +124,6 @@ concat_write(struct mtd_info *mtd, loff_t to, size_t len,
        int err = -EINVAL;
        int i;
 
-       if (!(mtd->flags & MTD_WRITEABLE))
-               return -EROFS;
-
-       *retlen = 0;
-
        for (i = 0; i < concat->num_subdev; i++) {
                struct mtd_info *subdev = concat->subdev[i];
                size_t size, retsize;
@@ -145,11 +138,7 @@ concat_write(struct mtd_info *mtd, loff_t to, size_t len,
                else
                        size = len;
 
-               if (!(subdev->flags & MTD_WRITEABLE))
-                       err = -EROFS;
-               else
-                       err = mtd_write(subdev, to, size, &retsize, buf);
-
+               err = mtd_write(subdev, to, size, &retsize, buf);
                if (err)
                        break;
 
@@ -176,19 +165,10 @@ concat_writev(struct mtd_info *mtd, const struct kvec *vecs,
        int i;
        int err = -EINVAL;
 
-       if (!(mtd->flags & MTD_WRITEABLE))
-               return -EROFS;
-
-       *retlen = 0;
-
        /* Calculate total length of data */
        for (i = 0; i < count; i++)
                total_len += vecs[i].iov_len;
 
-       /* Do not allow write past end of device */
-       if ((to + total_len) > mtd->size)
-               return -EINVAL;
-
        /* Check alignment */
        if (mtd->writesize > 1) {
                uint64_t __to = to;
@@ -224,12 +204,8 @@ concat_writev(struct mtd_info *mtd, const struct kvec *vecs,
                old_iov_len = vecs_copy[entry_high].iov_len;
                vecs_copy[entry_high].iov_len = size;
 
-               if (!(subdev->flags & MTD_WRITEABLE))
-                       err = -EROFS;
-               else
-                       err = mtd_writev(subdev, &vecs_copy[entry_low],
-                                        entry_high - entry_low + 1, to,
-                                        &retsize);
+               err = mtd_writev(subdev, &vecs_copy[entry_low],
+                                entry_high - entry_low + 1, to, &retsize);
 
                vecs_copy[entry_high].iov_len = old_iov_len - size;
                vecs_copy[entry_high].iov_base += size;
@@ -403,15 +379,6 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr)
        uint64_t length, offset = 0;
        struct erase_info *erase;
 
-       if (!(mtd->flags & MTD_WRITEABLE))
-               return -EROFS;
-
-       if (instr->addr > concat->mtd.size)
-               return -EINVAL;
-
-       if (instr->len + instr->addr > concat->mtd.size)
-               return -EINVAL;
-
        /*
         * Check for proper erase block alignment of the to-be-erased area.
         * It is easier to do this based on the super device's erase
@@ -459,8 +426,6 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr)
                        return -EINVAL;
        }
 
-       instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
-
        /* make a local copy of instr to avoid modifying the caller's struct */
        erase = kmalloc(sizeof (struct erase_info), GFP_KERNEL);
 
@@ -499,10 +464,6 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr)
                else
                        erase->len = length;
 
-               if (!(subdev->flags & MTD_WRITEABLE)) {
-                       err = -EROFS;
-                       break;
-               }
                length -= erase->len;
                if ((err = concat_dev_erase(subdev, erase))) {
                        /* sanity check: should never happen since
@@ -538,9 +499,6 @@ static int concat_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
        struct mtd_concat *concat = CONCAT(mtd);
        int i, err = -EINVAL;
 
-       if ((len + ofs) > mtd->size)
-               return -EINVAL;
-
        for (i = 0; i < concat->num_subdev; i++) {
                struct mtd_info *subdev = concat->subdev[i];
                uint64_t size;
@@ -575,9 +533,6 @@ static int concat_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
        struct mtd_concat *concat = CONCAT(mtd);
        int i, err = 0;
 
-       if ((len + ofs) > mtd->size)
-               return -EINVAL;
-
        for (i = 0; i < concat->num_subdev; i++) {
                struct mtd_info *subdev = concat->subdev[i];
                uint64_t size;
@@ -650,9 +605,6 @@ static int concat_block_isbad(struct mtd_info *mtd, loff_t ofs)
        if (!mtd_can_have_bb(concat->subdev[0]))
                return res;
 
-       if (ofs > mtd->size)
-               return -EINVAL;
-
        for (i = 0; i < concat->num_subdev; i++) {
                struct mtd_info *subdev = concat->subdev[i];
 
@@ -673,12 +625,6 @@ static int concat_block_markbad(struct mtd_info *mtd, loff_t ofs)
        struct mtd_concat *concat = CONCAT(mtd);
        int i, err = -EINVAL;
 
-       if (!mtd_can_have_bb(concat->subdev[0]))
-               return 0;
-
-       if (ofs > mtd->size)
-               return -EINVAL;
-
        for (i = 0; i < concat->num_subdev; i++) {
                struct mtd_info *subdev = concat->subdev[i];
 
@@ -716,10 +662,6 @@ static unsigned long concat_get_unmapped_area(struct mtd_info *mtd,
                        continue;
                }
 
-               /* we've found the subdev over which the mapping will reside */
-               if (offset + len > subdev->size)
-                       return (unsigned long) -EINVAL;
-
                return mtd_get_unmapped_area(subdev, len, offset, flags);
        }