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rapidio/tsi721: fix incorrect detection of address translation condition

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Fix incorrect condition to identify involvment of a address translation
mechanism.

This bug results in NULL pointer kernel crash dump in cases when mapping
of inbound RapidIO address range is requested within existing aprture.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexandre Bounine <[email protected]>
Cc: Matt Porter <[email protected]>
Cc: Andre van Herk <[email protected]>
Cc: Barry Wood <[email protected]>
Cc: <[email protected]>	[4.6+]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alexandre Bounine 2016-09-01 16:15:18 -07:00 • committed by Linus Torvalds
commit b30069291d
1 changed files with 1 additions and 1 deletions
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2
drivers/rapidio/devices/tsi721.c
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@ -1161,7 +1161,7 @@ static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
} else if (ibw_start < (ib_win->rstart + ib_win->size) &&
(ibw_start + ibw_size) > ib_win->rstart) {
/* Return error if address translation involved */
if (direct && ib_win->xlat) {
if (!direct || ib_win->xlat) {
ret = -EFAULT;
break;
}