linux-kernel - [PATCH 4.13 073/109] mailbox: bcm-flexrm-mailbox: Fix mask used in CMPL_START_ADDR

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Date:   Sun, 24 Sep 2017 22:33:34 +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, Anup Patel <anup.patel@...adcom.com>,
        Ray Jui <ray.jui@...adcom.com>,
        Scott Branden <scott.branden@...adcom.com>,
        Jassi Brar <jaswinder.singh@...aro.org>
Subject: [PATCH 4.13 073/109] mailbox: bcm-flexrm-mailbox: Fix mask used in CMPL_START_ADDR_VALUE()

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

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

From: Anup Patel <anup.patel@...adcom.com>

commit 6d2061b981af165d3e45462e0804b5a1f2f4c7bc upstream.

The mask used in CMPL_START_ADDR_VALUE() should be 27bits instead of
26bits. This incorrect mask was causing completion writes to 40bits
physical address fail.

This patch fixes mask used in CMPL_START_ADDR_VALUE() macro.

Fixes: dbc049eee730 ("mailbox: Add driver for Broadcom FlexRM
ring manager")

Signed-off-by: Anup Patel <anup.patel@...adcom.com>
Reviewed-by: Ray Jui <ray.jui@...adcom.com>
Reviewed-by: Scott Branden <scott.branden@...adcom.com>
Signed-off-by: Jassi Brar <jaswinder.singh@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mailbox/bcm-flexrm-mailbox.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mailbox/bcm-flexrm-mailbox.c
+++ b/drivers/mailbox/bcm-flexrm-mailbox.c
@@ -95,7 +95,7 @@
 
 /* Register RING_CMPL_START_ADDR fields */
 #define CMPL_START_ADDR_VALUE(pa)			\
-	((u32)((((u64)(pa)) >> RING_CMPL_ALIGN_ORDER) & 0x03ffffff))
+	((u32)((((u64)(pa)) >> RING_CMPL_ALIGN_ORDER) & 0x07ffffff))
 
 /* Register RING_CONTROL fields */
 #define CONTROL_MASK_DISABLE_CONTROL			12