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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2015-07-29 11:33:17 (GMT)
committerBjorn Helgaas <bhelgaas@google.com>2015-08-20 17:02:49 (GMT)
commitada8b675b76ec847bfa4a237d82a7a96da128768 (patch)
treea6913f510745066019619bcd2b5a835598817933 /arch/arm/kernel
parentaa4a5c0d2d7e3c30f9df033ea0367f148bb369f6 (diff)
downloadlinux-ada8b675b76ec847bfa4a237d82a7a96da128768.tar.xz
ARM/PCI: Replace panic with WARN messages on failures
In the ARM PCI bios32 layer, failures to dynamically allocate pci_sys_data for a PCI bus, or a PCI bus scan failure have to be considered serious warnings but they should not trigger a system panic so that at least the system is given a chance to be debugged. This patch replaces the panic statements with WARN() messages to improve error reporting in the ARM PCI bios32 layer. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Jingoo Han <jingoohan1@gmail.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> CC: Russell King <linux@arm.linux.org.uk> CC: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/bios32.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index bf370bc..4e95260 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -459,8 +459,8 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
for (nr = busnr = 0; nr < hw->nr_controllers; nr++) {
sys = kzalloc(sizeof(struct pci_sys_data), GFP_KERNEL);
- if (!sys)
- panic("PCI: unable to allocate sys data!");
+ if (WARN(!sys, "PCI: unable to allocate sys data!"))
+ break;
#ifdef CONFIG_PCI_MSI
sys->msi_ctrl = hw->msi_ctrl;
@@ -489,8 +489,10 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
sys->bus = pci_scan_root_bus(parent, sys->busnr,
hw->ops, sys, &sys->resources);
- if (!sys->bus)
- panic("PCI: unable to scan bus!");
+ if (WARN(!sys->bus, "PCI: unable to scan bus!")) {
+ kfree(sys);
+ break;
+ }
busnr = sys->bus->busn_res.end + 1;