From 43986798fd504c8cd846e3c65bcf732e3f971938 Mon Sep 17 00:00:00 2001 From: Zhouyang Jia Date: Tue, 12 Jun 2018 11:07:21 +0800 Subject: ipack: add error handling for ioremap_nocache When ioremap_nocache fails, the lack of error-handling code may cause unexpected results. This patch adds error-handling code after calling ioremap_nocache. Signed-off-by: Zhouyang Jia Acked-by: Samuel Iglesias Gonsalvez Signed-off-by: Greg Kroah-Hartman --- drivers/ipack/carriers/tpci200.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/ipack/carriers') diff --git a/drivers/ipack/carriers/tpci200.c b/drivers/ipack/carriers/tpci200.c index a16b320739b4..8a9c169b6f99 100644 --- a/drivers/ipack/carriers/tpci200.c +++ b/drivers/ipack/carriers/tpci200.c @@ -304,6 +304,13 @@ static int tpci200_register(struct tpci200_board *tpci200) ioremap_nocache(pci_resource_start(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR), TPCI200_IFACE_SIZE); + if (!tpci200->info->interface_regs) { + dev_err(&tpci200->info->pdev->dev, + "(bn 0x%X, sn 0x%X) failed to map driver user space!", + tpci200->info->pdev->bus->number, + tpci200->info->pdev->devfn); + goto out_release_mem8_space; + } /* Initialize lock that protects interface_regs */ spin_lock_init(&tpci200->regs_lock); -- cgit v1.2.3