From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit f670744a316ea983113a65313dcd387b5a992444 ]
mmc_add_host() may return error, if we ignore its return value, the memory that allocated in mmc_alloc_host() will be leaked and it will lead a kernel crash because of deleting not added device in the remove path.
So fix this by checking the return value and goto error path which will call mmc_free_host(), besides, free_irq() also needs be called.
Fixes: a5eb8bbd66cc ("mmc: add Toshiba PCI SD controller driver") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Link: https://lore.kernel.org/r/20221101063023.1664968-8-yangyingliang@huawei.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mmc/host/toshsd.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/toshsd.c b/drivers/mmc/host/toshsd.c index 8d037c2071ab..497791ffada6 100644 --- a/drivers/mmc/host/toshsd.c +++ b/drivers/mmc/host/toshsd.c @@ -651,7 +651,9 @@ static int toshsd_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (ret) goto unmap;
- mmc_add_host(mmc); + ret = mmc_add_host(mmc); + if (ret) + goto free_irq;
base = pci_resource_start(pdev, 0); dev_dbg(&pdev->dev, "MMIO %pa, IRQ %d\n", &base, pdev->irq); @@ -660,6 +662,8 @@ static int toshsd_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
return 0;
+free_irq: + free_irq(pdev->irq, host); unmap: pci_iounmap(pdev, host->ioaddr); release: