bhndb(4): Fix unsigned integer underflow in dynamic register window

handling. This resulted in the window target being left uninitialized
when an underflow occured.

Approved by:	adrian (mentor)
Differential Revision:	https://reviews.freebsd.org/D7617

This commit is contained in:

Landon J. Fuller

2016-08-23 19:03:11 +00:00

parent ce437beff1

commit 7ba0628f07

1 changed files with 3 additions and 2 deletions

									
										sys/dev/bhnd/bhndb/bhndb.c
									
		+3
		-2
	
												View File
												
				@@ -1728,8 +1728,9 @@ bhndb_io_resource(struct bhndb_softc *sc, bus_addr_t addr, bus_size_t size,

					/* Adjust the window if the I/O request won't fit in the current

					 * target range. */

					if (addr < dwa->target || 

					   (dwa->target + dwa->win->win_size) - addr < size)

					if (addr < dwa->target ||

					    addr > dwa->target + dwa->win->win_size ||

					    (dwa->target + dwa->win->win_size) - addr < size)

					{

						error = bhndb_dw_set_addr(sc->dev, sc->bus_res, dwa, addr,

						    size);