[PATCH 4.14 27/31] staging: ccree: fix 64 bit scatter/gather DMA ops

From: Greg Kroah-Hartman
Date: Sun Nov 19 2017 - 10:02:10 EST


4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>

commit e0b3f39092a1cff5548cbaf40096ec25e7721de6 upstream.

Fix a wrong offset used in splitting a 64 DMA address to MSB/LSB
parts needed for scatter/gather HW descriptors causing operations
relying on them to fail on 64 bit platforms.

Fixes: c6f7f2f4591f ("staging: ccree: refactor LLI access macros")
Reported-by: Stuart Yoder <stuart.yoder@xxxxxxx>
Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/staging/ccree/cc_lli_defs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/ccree/cc_lli_defs.h
+++ b/drivers/staging/ccree/cc_lli_defs.h
@@ -59,7 +59,7 @@ static inline void cc_lli_set_addr(u32 *
lli_p[LLI_WORD0_OFFSET] = (addr & U32_MAX);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
lli_p[LLI_WORD1_OFFSET] &= ~LLI_HADDR_MASK;
- lli_p[LLI_WORD1_OFFSET] |= FIELD_PREP(LLI_HADDR_MASK, (addr >> 16));
+ lli_p[LLI_WORD1_OFFSET] |= FIELD_PREP(LLI_HADDR_MASK, (addr >> 32));
#endif /* CONFIG_ARCH_DMA_ADDR_T_64BIT */
}