[ 53/68] ARM: 7345/1: errata: update workaround for A9 erratum #743622

[Greg KH]

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

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

From: Will Deacon <will.deacon@xxxxxxx>

commit efbc74ace95338484f8d732037b99c7c77098fce upstream.

Erratum #743622 affects all r2 variants of the Cortex-A9 processor, so
ensure that the workaround is applied regardless of the revision.

Reported-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/arm/Kconfig      |    2 +-
 arch/arm/mm/proc-v7.S |    4 +---
 2 files changed, 2 insertions(+), 4 deletions(-)

--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1179,7 +1179,7 @@ config ARM_ERRATA_743622
 	depends on CPU_V7
 	help
 	  This option enables the workaround for the 743622 Cortex-A9
-	  (r2p0..r2p2) erratum. Under very rare conditions, a faulty
+	  (r2p*) erratum. Under very rare conditions, a faulty
 	  optimisation in the Cortex-A9 Store Buffer may lead to data
 	  corruption. This workaround sets a specific bit in the diagnostic
 	  register of the Cortex-A9 which disables the Store Buffer
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -344,9 +344,7 @@ __v7_setup:
 	mcreq	p15, 0, r10, c15, c0, 1		@ write diagnostic register
 #endif
 #ifdef CONFIG_ARM_ERRATA_743622
-	teq	r6, #0x20			@ present in r2p0
-	teqne	r6, #0x21			@ present in r2p1
-	teqne	r6, #0x22			@ present in r2p2
+	teq	r5, #0x00200000			@ only present in r2p*
 	mrceq	p15, 0, r10, c15, c0, 1		@ read diagnostic register
 	orreq	r10, r10, #1 << 6		@ set bit #6
 	mcreq	p15, 0, r10, c15, c0, 1		@ write diagnostic register


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/