blk: host_dev: Sanity check on the size of host backing file
Since we are emulating a block device, its size should be multiple
of the configured block size.
Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/block/host_dev.c b/drivers/block/host_dev.c
index 0b43f80..30c7415 100644
--- a/drivers/block/host_dev.c
+++ b/drivers/block/host_dev.c
@@ -58,6 +58,11 @@
size = os_filesize(fd);
desc = dev_get_uclass_plat(blk);
+ if (size % desc->blksz) {
+ printf("The size of host backing file '%s' is not multiple of "
+ "the device block size\n", filename);
+ goto err_fname;
+ }
desc->lba = size / desc->blksz;
/* write this in last, when nothing can go wrong */