parisc: ccio-dma: Handle kmalloc failure in ccio_init_resources()

[ Upstream commit d46c742f827fa2326ab1f4faa1cccadb56912341 ]

As the possible failure of the kmalloc(), it should be better
to fix this error path, check and return '-ENOMEM' error code.

Signed-off-by: Li Qiong <liqiong@nfschina.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c
index 6efab7a06c5fc929b72b9f332037db4cdbefcb91..73ee74d6e7a3d4a88d475eb0e94ecf651b0e5117 100644 (file)
--- a/drivers/parisc/ccio-dma.c
+++ b/drivers/parisc/ccio-dma.c
@@ -1390,15 +1390,17 @@ ccio_init_resource(struct resource *res, char *name, void __iomem *ioaddr)
        }
 }
 
-static void __init ccio_init_resources(struct ioc *ioc)
+static int __init ccio_init_resources(struct ioc *ioc)
 {
        struct resource *res = ioc->mmio_region;
        char *name = kmalloc(14, GFP_KERNEL);
-
+       if (unlikely(!name))
+               return -ENOMEM;
        snprintf(name, 14, "GSC Bus [%d/]", ioc->hw_path);
 
        ccio_init_resource(res, name, &ioc->ioc_regs->io_io_low);
        ccio_init_resource(res + 1, name, &ioc->ioc_regs->io_io_low_hv);
+       return 0;
 }
 
 static int new_ioc_area(struct resource *res, unsigned long size,
@@ -1552,7 +1554,10 @@ static int __init ccio_probe(struct parisc_device *dev)
                return -ENOMEM;
        }
        ccio_ioc_init(ioc);
-       ccio_init_resources(ioc);
+       if (ccio_init_resources(ioc)) {
+               kfree(ioc);
+               return -ENOMEM;
+       }
        hppa_dma_ops = &ccio_ops;
        dev->dev.platform_data = kzalloc(sizeof(struct pci_hba_data), GFP_KERNEL);