Messages in this thread Patch in this message | | | From | Tang Bin <> | Subject | [PATCH 3/3] ipmi:bt-bmc: Fix error handling and status check | Date | Tue, 14 Apr 2020 22:14:24 +0800 |
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If the function platform_get_irq() failed, the negative value returned will not be detected here. So fix error handling in bt_bmc_config_irq(). And if devm_request_irq() failed, 'bt_bmc->irq' is assigned to zero maybe redundant, it may be more suitable for using the correct negative values to make the status check in the function bt_bmc_remove().
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com> Signed-off-by: Shengju Zhang <zhangshengju@cmss.chinamobile.com> --- drivers/char/ipmi/bt-bmc.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/char/ipmi/bt-bmc.c b/drivers/char/ipmi/bt-bmc.c index 1d4bf5c65..1740c6dc8 100644 --- a/drivers/char/ipmi/bt-bmc.c +++ b/drivers/char/ipmi/bt-bmc.c @@ -399,16 +399,14 @@ static int bt_bmc_config_irq(struct bt_bmc *bt_bmc, struct device *dev = &pdev->dev; int rc; - bt_bmc->irq = platform_get_irq(pdev, 0); - if (!bt_bmc->irq) - return -ENODEV; + bt_bmc->irq = platform_get_irq_optional(pdev, 0); + if (bt_bmc->irq < 0) + return bt_bmc->irq; rc = devm_request_irq(dev, bt_bmc->irq, bt_bmc_irq, IRQF_SHARED, DEVICE_NAME, bt_bmc); - if (rc < 0) { - bt_bmc->irq = 0; + if (rc < 0) return rc; - } /* * Configure IRQs on the bmc clearing the H2B and HBUSY bits; @@ -499,7 +497,7 @@ static int bt_bmc_remove(struct platform_device *pdev) struct bt_bmc *bt_bmc = dev_get_drvdata(&pdev->dev); misc_deregister(&bt_bmc->miscdev); - if (!bt_bmc->irq) + if (bt_bmc->irq < 0) del_timer_sync(&bt_bmc->poll_timer); return 0; } -- 2.20.1.windows.1
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