Commit 7a2785af authored Nov 09, 2015 by Mitchel Humpherys

iommu/arm-smmu: Reduce TLB sync timeout



We're currently waiting for up to 1 second for the TLB sync command to
finish.  Unfortunately, this is long enough to trigger a watchdog bark
since the time between the watchdog pet timer interrupt and the bark
interrupt is only 1 second.  Fix this by reducing the timeout to 500
milliseconds, which is still more than enough time for the TLB sync
command to complete.

CRs-Fixed: 929880
Change-Id: I467cd5fd9caa24b4f120a7fe8c8f57c73687006b
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>

parent 91f4e6e6

drivers/iommu/arm-smmu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -142,7 +142,7 @@
		#define ARM_SMMU_GR0_sTLBGSYNC 0x70
		#define ARM_SMMU_GR0_sTLBGSTATUS 0x74
		#define sTLBGSTATUS_GSACTIVE (1 << 0)
		#define TLB_LOOP_TIMEOUT 1000000 /* 1s! */
		#define TLB_LOOP_TIMEOUT 500000 /* 500ms */

		/* Stream mapping registers */
		#define ARM_SMMU_GR0_SMR(n) (0x800 + ((n) << 2))