Re: [PATCH] firewire: fix function type cast warning

[Takashi Sakamoto <o-takashi@sakamocchi.jp>]

Hi Arnd,

On Mon, Oct 26, 2020 at 10:51:27PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> gcc -Wextra complains about a suspicious cast:
> 
> rivers/firewire/core-cdev.c:985:8: warning: cast between incompatible function types from ‘void (*)(struct fw_iso_context *, dma_addr_t,  void *)’ {aka ‘void (*)(struct fw_iso_context *, long long unsigned int,  void *)’} to ‘void (*)(struct fw_iso_context *, u32,  size_t,  void *, void *)’ {aka ‘void (*)(struct fw_iso_context *, unsigned int,  long unsigned int,  void *, void *)’} [-Wcast-function-type]
> 
> The behavior is correct in the end, but this is more clearly
> expressed using a transparent union.
> 
> Fixes: 872e330e3880 ("firewire: add isochronous multichannel reception")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/firewire/core-cdev.c |  6 +++---
>  drivers/firewire/core-iso.c  |  2 +-
>  include/linux/firewire.h     | 17 ++++++++---------
>  3 files changed, 12 insertions(+), 13 deletions(-)

Oscar Carter has posted a patch to fix it.
https://sourceforge.net/p/linux1394/mailman/message/37024966/

I don't know exactly but maintainers seems to overlook it...


Thanks

Takashi Sakamoto