Revert "vfio/platform: check the bounds of read/write syscalls"

This reverts commit 61ba518.

It had been committed multiple times to the tree, and isn't needed
again.

Link: https://lore.kernel.org/r/a082db2605514513a0a8568382d5bd2b6f1877a0.camel@cyberus-technology.de
Reported-by: Stefan Nürnberger <stefan.nuernberger@cyberus-technology.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: gregkh

drivers/vfio/platform/vfio_platform_common.c

@@ -393,11 +393,6 @@ static ssize_t vfio_platform_read_mmio(struct vfio_platform_region *reg,
 
 	count = min_t(size_t, count, reg->size - off);
 
-	if (off >= reg->size)
-		return -EINVAL;
-
-	count = min_t(size_t, count, reg->size - off);
-
 	if (!reg->ioaddr) {
 		reg->ioaddr =
 			ioremap(reg->addr, reg->size);
@@ -482,11 +477,6 @@ static ssize_t vfio_platform_write_mmio(struct vfio_platform_region *reg,
 
 	count = min_t(size_t, count, reg->size - off);
 
-	if (off >= reg->size)
-		return -EINVAL;
-
-	count = min_t(size_t, count, reg->size - off);
-
 	if (!reg->ioaddr) {
 		reg->ioaddr =
 			ioremap(reg->addr, reg->size);