4.2.8-ckt12 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------ From: Andy Shevchenko <[email protected]> commit 7f0c5ae18d649ed2f4978cbf07c02a0ff732f23e upstream. There is a potential resource leak in case when ->probe() fails. We have to unregister and remove clock tree which is done here. This is a follow up to previously pushed commit c4726abce63b ("mfd: intel_quark_i2c_gpio: Use clkdev_create()") that prevents double free() when clkdev_drop() followed by kfree() in devm_kcalloc() release stage. I leave Fixes tag here, but the backporting will require to backport the commit c4726abce63b ("mfd: intel_quark_i2c_gpio: Use clkdev_create()") first. Fixes: 60ae5b9f5cdd (mfd: intel_quark_i2c_gpio: Add Intel Quark X1000 I2C-GPIO MFD Driver) Signed-off-by: Andy Shevchenko <[email protected]> Acked-by: Stephen Boyd <[email protected]> Signed-off-by: Lee Jones <[email protected]> Signed-off-by: Kamal Mostafa <[email protected]> --- drivers/mfd/intel_quark_i2c_gpio.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) diff --git a/drivers/mfd/intel_quark_i2c_gpio.c b/drivers/mfd/intel_quark_i2c_gpio.c index cbbf84b..340ff40 100644 --- a/drivers/mfd/intel_quark_i2c_gpio.c +++ b/drivers/mfd/intel_quark_i2c_gpio.c @@ -125,6 +125,7 @@ static int intel_quark_register_i2c_clk(struct intel_quark_mfd *quark_mfd) INTEL_QUARK_I2C_CONTROLLER_CLK); if (!quark_mfd->i2c_clk_lookup) { + clk_unregister(quark_mfd->i2c_clk); dev_err(&pdev->dev, "Fixed clk register failed\n"); return -ENOMEM; } @@ -136,7 +137,7 @@ static void intel_quark_unregister_i2c_clk(struct pci_dev *pdev) { struct intel_quark_mfd *quark_mfd = dev_get_drvdata(&pdev->dev); - if (!quark_mfd->i2c_clk || !quark_mfd->i2c_clk_lookup) + if (!quark_mfd->i2c_clk_lookup) return; clkdev_drop(quark_mfd->i2c_clk_lookup); @@ -232,26 +233,34 @@ static int intel_quark_mfd_probe(struct pci_dev *pdev, quark_mfd = devm_kzalloc(&pdev->dev, sizeof(*quark_mfd), GFP_KERNEL); if (!quark_mfd) return -ENOMEM; + quark_mfd->pdev = pdev; + dev_set_drvdata(&pdev->dev, quark_mfd); ret = intel_quark_register_i2c_clk(quark_mfd); if (ret) return ret; - dev_set_drvdata(&pdev->dev, quark_mfd); - ret = intel_quark_i2c_setup(pdev, &intel_quark_mfd_cells[MFD_I2C_BAR]); if (ret) - return ret; + goto err_unregister_i2c_clk; ret = intel_quark_gpio_setup(pdev, &intel_quark_mfd_cells[MFD_GPIO_BAR]); if (ret) - return ret; + goto err_unregister_i2c_clk; - return mfd_add_devices(&pdev->dev, 0, intel_quark_mfd_cells, - ARRAY_SIZE(intel_quark_mfd_cells), NULL, 0, - NULL); + ret = mfd_add_devices(&pdev->dev, 0, intel_quark_mfd_cells, + ARRAY_SIZE(intel_quark_mfd_cells), NULL, 0, + NULL); + if (ret) + goto err_unregister_i2c_clk; + + return 0; + +err_unregister_i2c_clk: + intel_quark_unregister_i2c_clk(pdev); + return ret; } static void intel_quark_mfd_remove(struct pci_dev *pdev) -- 2.7.4
