drivers/tty/serial/8250/8250_lpss.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
From: LuMingYin <11570291+yin-luming@user.noreply.gitee.com>
In the lpss8250_probe function in the file /linux/drivers/tty/serial/8250/8250_lpss.c, there were certain return paths where pci_free_irq_vectors was not called to release memory related to pdev, leading to a memory leak. This commit fixes that issue."
Signed-off-by: LuMingYin <11570291+yin-luming@user.noreply.gitee.com>
---
drivers/tty/serial/8250/8250_lpss.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c
index 776ec1ef29d6..2bb86f9cad5b 100644
--- a/drivers/tty/serial/8250/8250_lpss.c
+++ b/drivers/tty/serial/8250/8250_lpss.c
@@ -344,11 +344,11 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
uart.port.mapbase = pci_resource_start(pdev, 0);
uart.port.membase = pcim_iomap(pdev, 0, 0);
if (!uart.port.membase)
- return -ENOMEM;
+ goto early_err_exit;
ret = lpss->board->setup(lpss, &uart.port);
if (ret)
- return ret;
+ goto early_err_exit;
dw8250_setup_port(&uart.port);
@@ -367,6 +367,7 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
err_exit:
lpss->board->exit(lpss);
+early_err_exit:
pci_free_irq_vectors(pdev);
return ret;
}
--
2.25.1
On Fri, Apr 26, 2024 at 03:19:39AM +0100, lumingyindetect@126.com wrote: > From: LuMingYin <11570291+yin-luming@user.noreply.gitee.com> > > In the lpss8250_probe function in the file > /linux/drivers/tty/serial/8250/8250_lpss.c, there were certain return paths > where pci_free_irq_vectors was not called to release memory related to pdev, > leading to a memory leak. This commit fixes that issue." This patch does not fix anything. The driver uses pcim_enable_device() which changes how this all behaves. NAK. -- With Best Regards, Andy Shevchenko
On Fri, 26 Apr 2024, lumingyindetect@126.com wrote: > From: LuMingYin <11570291+yin-luming@user.noreply.gitee.com> Use: git log --oneline -- drivers/tty/serial/8250/8250_lpss.c to learn what prefix you should use for shortlog (on the subject line). Beyond the correct prefix, don't use filename in the shortlog at all. "Fixed" -> "Fix" "in xx file" is awfully generic, please be more specific where the leak is. > In the lpss8250_probe function in the file /linux/drivers/tty/serial/8250/8250_lpss.c, there were certain return paths where pci_free_irq_vectors was not called to release memory related to pdev, leading to a memory leak. This commit fixes that issue." - Wrap this properly. - Don't write full paths like that. - Put () into description when talking about functions. - Use imperative language, don't use "This patch ...". - Add Fixes tag > Signed-off-by: LuMingYin <11570291+yin-luming@user.noreply.gitee.com> > --- > drivers/tty/serial/8250/8250_lpss.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c > index 776ec1ef29d6..2bb86f9cad5b 100644 > --- a/drivers/tty/serial/8250/8250_lpss.c > +++ b/drivers/tty/serial/8250/8250_lpss.c > @@ -344,11 +344,11 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) > uart.port.mapbase = pci_resource_start(pdev, 0); > uart.port.membase = pcim_iomap(pdev, 0, 0); > if (!uart.port.membase) > - return -ENOMEM; > + goto early_err_exit; > > ret = lpss->board->setup(lpss, &uart.port); > if (ret) > - return ret; > + goto early_err_exit; > > dw8250_setup_port(&uart.port); > > @@ -367,6 +367,7 @@ static int lpss8250_probe(struct pci_dev *pdev, const struct pci_device_id *id) > > err_exit: > lpss->board->exit(lpss); > +early_err_exit: This label could be more specific that it's about freeing the vectors. > pci_free_irq_vectors(pdev); > return ret; > } > -- i.
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