[PATCH net-next] qed: Fix next-ptr chains for BE / 32-bit

[PATCH net-next] qed: Fix next-ptr chains for BE / 32-bit

[Yuval Mintz]

Commit a91eb52abb50 ("qed: Revisit chain implementation") contains an
incorrect implementation for BE platforms, as device's regpairs containing
addresses are LE and they're not converted correctly when read back.
In addition, it raises a compilation warning for 32-bit platforms where
dma_addr_t is a 32-bit variable.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
---
Dave,

Please consider applying this to `net-next'.

Thanks,
Yuval
---
 include/linux/qed/qed_chain.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/linux/qed/qed_chain.h b/include/linux/qed/qed_chain.h
index eceaa9e..7e441bd 100644
--- a/include/linux/qed/qed_chain.h
+++ b/include/linux/qed/qed_chain.h
@@ -25,10 +25,9 @@
 				} while (0)
 
 #define HILO_GEN(hi, lo, type)  ((((type)(hi)) << 32) + (lo))
-#define HILO_DMA(hi, lo)        HILO_GEN(hi, lo, dma_addr_t)
 #define HILO_64(hi, lo) HILO_GEN((le32_to_cpu(hi)), (le32_to_cpu(lo)), u64)
-#define HILO_DMA_REGPAIR(regpair)       (HILO_DMA(regpair.hi, regpair.lo))
 #define HILO_64_REGPAIR(regpair)        (HILO_64(regpair.hi, regpair.lo))
+#define HILO_DMA_REGPAIR(regpair)	((dma_addr_t)HILO_64_REGPAIR(regpair))
 
 enum qed_chain_mode {
 	/* Each Page contains a next pointer at its end */
-- 
1.9.3

Re: [PATCH net-next] qed: Fix next-ptr chains for BE / 32-bit

[David Miller]

From: Yuval Mintz <Yuval.Mintz@qlogic.com>
Date: Sat, 4 Jun 2016 08:20:16 +0300

> Commit a91eb52abb50 ("qed: Revisit chain implementation") contains an
> incorrect implementation for BE platforms, as device's regpairs containing
> addresses are LE and they're not converted correctly when read back.
> In addition, it raises a compilation warning for 32-bit platforms where
> dma_addr_t is a 32-bit variable.
> 
> Reported-by: kbuild test robot <fengguang.wu@intel.com>
> Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>

Applied, thanks.