linux-kernel - [PATCH 5.12 631/677] powerpc/52xx: Fix an invalid ASM expression (addi used instead of add)

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Date:   Wed, 12 May 2021 16:51:17 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Michael Ellerman <mpe@...erman.id.au>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 631/677] powerpc/52xx: Fix an invalid ASM expression (addi used instead of add)

From: Christophe Leroy <christophe.leroy@...roup.eu>

[ Upstream commit 8a87a507714386efc39c3ae6fa24d4f79846b522 ]

  AS      arch/powerpc/platforms/52xx/lite5200_sleep.o
arch/powerpc/platforms/52xx/lite5200_sleep.S: Assembler messages:
arch/powerpc/platforms/52xx/lite5200_sleep.S:184: Warning: invalid register expression

In the following code, 'addi' is wrong, has to be 'add'

	/* local udelay in sram is needed */
  udelay: /* r11 - tb_ticks_per_usec, r12 - usecs, overwrites r13 */
	mullw	r12, r12, r11
	mftb	r13	/* start */
	addi	r12, r13, r12 /* end */

Fixes: ee983079ce04 ("[POWERPC] MPC5200 low power mode")
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Link: https://lore.kernel.org/r/cb4cec9131c8577803367f1699209a7e104cec2a.1619025821.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/powerpc/platforms/52xx/lite5200_sleep.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/52xx/lite5200_sleep.S b/arch/powerpc/platforms/52xx/lite5200_sleep.S
index 11475c58ea43..afee8b1515a8 100644
--- a/arch/powerpc/platforms/52xx/lite5200_sleep.S
+++ b/arch/powerpc/platforms/52xx/lite5200_sleep.S
@@ -181,7 +181,7 @@ sram_code:
   udelay: /* r11 - tb_ticks_per_usec, r12 - usecs, overwrites r13 */
 	mullw	r12, r12, r11
 	mftb	r13	/* start */
-	addi	r12, r13, r12 /* end */
+	add	r12, r13, r12 /* end */
     1:
 	mftb	r13	/* current */
 	cmp	cr0, r13, r12
-- 
2.30.2