提交 b3006929 编写于 作者: A Alexandre Bounine 提交者: Linus Torvalds

rapidio/tsi721: fix incorrect detection of address translation condition

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/20160901173144.2983-1-alexandre.bounine@idt.comSigned-off-by: NAlexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Barry Wood <barry.wood@idt.com>
Cc: <stable@vger.kernel.org>	[4.6+]
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 1e1011af
...@@ -1161,7 +1161,7 @@ static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart, ...@@ -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) && } else if (ibw_start < (ib_win->rstart + ib_win->size) &&
(ibw_start + ibw_size) > ib_win->rstart) { (ibw_start + ibw_size) > ib_win->rstart) {
/* Return error if address translation involved */ /* Return error if address translation involved */
if (direct && ib_win->xlat) { if (!direct || ib_win->xlat) {
ret = -EFAULT; ret = -EFAULT;
break; break;
} }
......
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