https://github.com/torvalds/linux
Revision c1c2a15c2b5379ea8e44dcdcc298e3de42076ba0 authored by Uwe Kleine-König on 21 June 2022, 06:40:36 UTC, committed by Bartosz Golaszewski on 23 June 2022, 14:42:27 UTC
If a platform device's remove callback returns non-zero, the device core emits a warning and still removes the device and calls the devm cleanup callbacks. So it's not save to not unregister the gpiochip because on the next request to a GPIO the driver accesses kfree()'d memory. Also if an IRQ triggers, the freed memory is accessed. Instead rely on the GPIO framework to ensure that after gpiochip_remove() all GPIOs are freed and so the corresponding IRQs are unmapped. This is a preparation for making platform remove callbacks return void. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
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History 
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Tip revision: c1c2a15c2b5379ea8e44dcdcc298e3de42076ba0 authored by Uwe Kleine-König on 21 June 2022, 06:40:36 UTC
gpio: grgpio: Fix device removing
gpio: grgpio: Fix device removing
Tip revision: c1c2a15
| File | Mode | Size |
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | -rw-r--r-- | 19.8 KB |
| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 71 bytes |
| .gitattributes | -rw-r--r-- | 62 bytes |
| .gitignore | -rw-r--r-- | 1.9 KB |
| .mailmap | -rw-r--r-- | 22.7 KB |
| COPYING | -rw-r--r-- | 496 bytes |
| CREDITS | -rw-r--r-- | 98.9 KB |
| Kbuild | -rw-r--r-- | 1.3 KB |
| Kconfig | -rw-r--r-- | 555 bytes |
| MAINTAINERS | -rw-r--r-- | 650.1 KB |
| Makefile | -rw-r--r-- | 64.1 KB |
| README | -rw-r--r-- | 727 bytes |
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