From: Yang Yingliang yangyingliang@huawei.com
[ 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 --- arch/powerpc/sysdev/xive/spapr.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c index e9b8e06c9dce..be1619c9b726 100644 --- a/arch/powerpc/sysdev/xive/spapr.c +++ b/arch/powerpc/sysdev/xive/spapr.c @@ -323,6 +323,7 @@ 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; }