linux-kernel - [PATCH 4.19 174/280] irqchip/gic-v3-its: Avoid parsing _indirect

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Date:   Fri, 22 Mar 2019 12:15:27 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zenghui Yu <yuzenghui@...wei.com>,
        Marc Zyngier <marc.zyngier@....com>
Subject: [PATCH 4.19 174/280] irqchip/gic-v3-its: Avoid parsing _indirect_ twice for Device table

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

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

From: Zenghui Yu <yuzenghui@...wei.com>

commit 8d565748b6035eeda18895c213396a4c9fac6a4c upstream.

In current logic, its_parse_indirect_baser() will be invoked twice
when allocating Device tables. Add a *break* to omit the unnecessary
and annoying (might be ...) invoking.

Fixes: 32bd44dc19de ("irqchip/gic-v3-its: Fix the incorrect parsing of VCPU table size")
Cc: stable@...r.kernel.org
Signed-off-by: Zenghui Yu <yuzenghui@...wei.com>
Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/irqchip/irq-gic-v3-its.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1893,6 +1893,8 @@ static int its_alloc_tables(struct its_n
 			indirect = its_parse_indirect_baser(its, baser,
 							    psz, &order,
 							    its->device_ids);
+			break;
+
 		case GITS_BASER_TYPE_VCPU:
 			indirect = its_parse_indirect_baser(its, baser,
 							    psz, &order,