From: Yang Yingliang <yangyingliang@huawei.com>
Date: Mon, 17 Oct 2022 03:23:33 +0000 (+0800)
Subject: powerpc/xive: add missing iounmap() in error path in xive_spapr_populate_irq_data()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5de1902244458ed800b33a989ea2510c0e73135b;p=linux.git

powerpc/xive: add missing iounmap() in error path in xive_spapr_populate_irq_data()

[ Upstream commit 8b49670f3bb3f10cd4d5a6dca17f5a31b173ecdc ]

If remapping 'data->trig_page' fails, the 'data->eoi_mmio' need be unmapped
before returning from xive_spapr_populate_irq_data().

Fixes: eac1e731b59e ("powerpc/xive: guest exploitation of the XIVE interrupt controller")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221017032333.1852406-1-yangyingliang@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c
index 2bf78a30238b9..43bd2579d942b 100644
--- a/arch/powerpc/sysdev/xive/spapr.c
+++ b/arch/powerpc/sysdev/xive/spapr.c
@@ -437,6 +437,7 @@ static int xive_spapr_populate_irq_data(u32 hw_irq, struct xive_irq_data *data)
 
 	data->trig_mmio = ioremap(data->trig_page, 1u << data->esb_shift);
 	if (!data->trig_mmio) {
+		iounmap(data->eoi_mmio);
 		pr_err("Failed to map trigger page for irq 0x%x\n", hw_irq);
 		return -ENOMEM;
 	}