| Message ID | 20220223191441.348109-3-krzysztof.kozlowski@canonical.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix broken usage of driver_override (and kfree of static memory) | expand |
On 23/02/2022 20:14, Krzysztof Kozlowski wrote: > The driver_override field from platform driver should not be initialized > from static memory (string literal) because the core later kfree() it, > for example when driver_override is set via sysfs. > > Use dedicated helper to set driver_override properly. > > Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support") > Cc: <stable@vger.kernel.org> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> > --- > drivers/clk/imx/clk-scu.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c > index 083da31dc3ea..15e1d670e51f 100644 > --- a/drivers/clk/imx/clk-scu.c > +++ b/drivers/clk/imx/clk-scu.c > @@ -683,7 +683,12 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name, > return ERR_PTR(ret); > } > > - pdev->driver_override = "imx-scu-clk"; > + ret = driver_set_override(&pdev->dev, &pdev->driver_override, > + "imx-scu-clk"); > + if (ret) { > + platform_device_put(pdev); > + return ret; This is wrong - should be ERR_PTR. Best regards, Krzysztof
diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c index 083da31dc3ea..15e1d670e51f 100644 --- a/drivers/clk/imx/clk-scu.c +++ b/drivers/clk/imx/clk-scu.c @@ -683,7 +683,12 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name, return ERR_PTR(ret); } - pdev->driver_override = "imx-scu-clk"; + ret = driver_set_override(&pdev->dev, &pdev->driver_override, + "imx-scu-clk"); + if (ret) { + platform_device_put(pdev); + return ret; + } ret = imx_clk_scu_attach_pd(&pdev->dev, rsrc_id); if (ret)
The driver_override field from platform driver should not be initialized from static memory (string literal) because the core later kfree() it, for example when driver_override is set via sysfs. Use dedicated helper to set driver_override properly. Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support") Cc: <stable@vger.kernel.org> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> --- drivers/clk/imx/clk-scu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)