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SubjectRe: [PATCH] mtd: dc21285.c: handle nw_gpio_lock correctly
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On Fri, 2012-05-25 at 10:28 +0200, Christian Dietrich wrote:
> nw_gpio_lock is a raw_spinlock_t, therefore raw_spin_lock_irqsave should be
> used. it doesn't make a difference, while rlock is the first element of
> spinlock_t.
>
> Also the check for machine_is_netwinder() is a double check of
> CONFIG_ARCH_NETWINDER.
>
> Signed-off-by: Christian Dietrich <christian.dietrich@informatik.uni-erlangen.de>

I do not understand this commit message. Please, split your patch on 2
patches and put a better to each one. Thanks!

> ---
> drivers/mtd/maps/dc21285.c | 13 +++++--------
> 1 files changed, 5 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/mtd/maps/dc21285.c b/drivers/mtd/maps/dc21285.c
> index 080f060..38fbf23 100644
> --- a/drivers/mtd/maps/dc21285.c
> +++ b/drivers/mtd/maps/dc21285.c
> @@ -38,9 +38,9 @@ static void nw_en_write(void)
> * we want to write a bit pattern XXX1 to Xilinx to enable
> * the write gate, which will be open for about the next 2ms.
> */
> - spin_lock_irqsave(&nw_gpio_lock, flags);
> + raw_spin_lock_irqsave(&nw_gpio_lock, flags);

Please, make this to be a separate patch.

And surely there are many other places in the kernel which need this
conversion?

> static void dc21285_write8(struct map_info *map, const map_word d, unsigned long adr)
> {
> - if (machine_is_netwinder())
> - nw_en_write();
> + nw_en_write();
> *CSR_ROMWRITEREG = adr & 3;

I do not understand why this "if" statement is not needed? Why it was
there in the first place and why you remove it? Please, describe this in
the commit message.

--
Best Regards,
Artem Bityutskiy
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