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SubjectRe: [PATCH] spi: bitbang: Fix NULL pointer dereference in spi_unregister_master
YueHaibing <> 於 2019年5月16日 週四 下午3:57寫道:
> If spi_register_master fails in spi_bitbang_start
> because device_add failure, We should return the
> error code other than 0, otherwise calling
> spi_bitbang_stop may trigger NULL pointer dereference
> like this:

Reviewed-by: Axel Lin <>

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