shithub: lwext4

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Return success when 0 block read/write is called

--- a/blockdev/linux/ext4_filedev.c

+++ b/blockdev/linux/ext4_filedev.c

@@ -86,7 +86,8 @@

 {

 	if (fseeko(dev_file, blk_id * bdev->ph_bsize, SEEK_SET))

 		return EIO;

-

+	if (!blk_cnt)

+		return EOK;

 	if (!fread(buf, bdev->ph_bsize * blk_cnt, 1, dev_file))

 		return EIO;

@@ -112,7 +113,8 @@

 {

 	if (fseeko(dev_file, blk_id * bdev->ph_bsize, SEEK_SET))

 		return EIO;

-

+	if (!blk_cnt)

+		return EOK;

 	if (!fwrite(buf, bdev->ph_bsize * blk_cnt, 1, dev_file))

 		return EIO;