| Message ID | 20230606031841.38665-1-jiasheng@iscas.ac.cn (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | [v3] gpio: ath79: Add missing check for platform_get_irq | expand |
| Context | Check | Description |
|---|---|---|
| conchuod/cover_letter | success | Single patches do not need cover letters |
| conchuod/tree_selection | success | Guessed tree name to be fixes at HEAD 6966d7988c4f |
| conchuod/fixes_present | success | Fixes tag present in non-next series |
| conchuod/maintainers_pattern | success | MAINTAINERS pattern errors before the patch: 6 and now 6 |
| conchuod/verify_signedoff | success | Signed-off-by tag matches author and committer |
| conchuod/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| conchuod/build_rv64_clang_allmodconfig | success | Errors and warnings before: 8 this patch: 8 |
| conchuod/module_param | success | Was 0 now: 0 |
| conchuod/build_rv64_gcc_allmodconfig | success | Errors and warnings before: 8 this patch: 8 |
| conchuod/build_rv32_defconfig | success | Build OK |
| conchuod/dtb_warn_rv64 | success | Errors and warnings before: 3 this patch: 3 |
| conchuod/header_inline | success | No static functions without inline keyword in header files |
| conchuod/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 11 lines checked |
| conchuod/build_rv64_nommu_k210_defconfig | success | Build OK |
| conchuod/verify_fixes | success | Fixes tag looks correct |
| conchuod/build_rv64_nommu_virt_defconfig | success | Build OK |
Tue, Jun 06, 2023 at 11:18:41AM +0800, Jiasheng Jiang kirjoitti: Is this v4? > Add the missing check for platform_get_irq() and return error > if it fails. > The returned error code will be dealed with in > module_platform_driver(ath79_gpio_driver) and the driver will not > be registered. No, this functional change and has not to be for the fixes unless _this_ is the regression you are fixing. Did the driver work before at some point as after this change? Otherwise you have to _justify_ that this functional change won't break existing setups (with broked IRQ in Device Tree, for example).
Tue, Jun 06, 2023 at 12:28:17PM +0300, andy.shevchenko@gmail.com kirjoitti: > Tue, Jun 06, 2023 at 11:18:41AM +0800, Jiasheng Jiang kirjoitti: > > Is this v4? > > > Add the missing check for platform_get_irq() and return error > > if it fails. > > The returned error code will be dealed with in > > module_platform_driver(ath79_gpio_driver) and the driver will not > > be registered. > > No, this functional change and has not to be for the fixes unless _this_ is the > regression you are fixing. Did the driver work before at some point as after > this change? To be more clear, answer to the following questions: 1) does driver work with wrong DT configuration? 2a) if yes, does it make sense, i.e. the hardware functioning usefully? 2b) if yes, can we guarantee there are no broken configurations in the wild? Depending on the answers correct your code and/or commit message. > Otherwise you have to _justify_ that this functional change won't break > existing setups (with broked IRQ in Device Tree, for example).
diff --git a/drivers/gpio/gpio-ath79.c b/drivers/gpio/gpio-ath79.c index aa0a954b8392..d2d838ad33bb 100644 --- a/drivers/gpio/gpio-ath79.c +++ b/drivers/gpio/gpio-ath79.c @@ -285,7 +285,10 @@ static int ath79_gpio_probe(struct platform_device *pdev) GFP_KERNEL); if (!girq->parents) return -ENOMEM; - girq->parents[0] = platform_get_irq(pdev, 0); + err = platform_get_irq(pdev, 0); + if (err < 0) + return err; + girq->parents[0] = err; girq->default_type = IRQ_TYPE_NONE; girq->handler = handle_simple_irq; }
Add the missing check for platform_get_irq() and return error if it fails. The returned error code will be dealed with in module_platform_driver(ath79_gpio_driver) and the driver will not be registered. Fixes: 2b8f89e19b6d ("gpio: ath79: Add support for the interrupt controller") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> --- Changelog: v2 -> v3: 1. Check before assigning values. v1 -> v2: 1. Return "girq->parents[0]" instead of "-ENODEV". --- drivers/gpio/gpio-ath79.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)