Dan Carpenter <dan.carpen...@oracle.com> writes:
> On Mon, Nov 26, 2018 at 10:24:38AM +0200, Kalle Valo wrote:
>> Dan Carpenter <dan.carpen...@oracle.com> writes:
>>
>> > The devm_memremap() function doesn't return NULLs, it returns error
>> > pointers.
>> >
>> > Fixes: ba94c753ccb4 ("ath10k: add QMI message handshake for wcn3990
>> > client")
>> > Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
>> > ---
>> > drivers/net/wireless/ath/ath10k/qmi.c | 4 ++--
>> > 1 file changed, 2 insertions(+), 2 deletions(-)
>> >
>> > diff --git a/drivers/net/wireless/ath/ath10k/qmi.c
>> > b/drivers/net/wireless/ath/ath10k/qmi.c
>> > index f0429bee35c2..37b3bd629f48 100644
>> > --- a/drivers/net/wireless/ath/ath10k/qmi.c
>> > +++ b/drivers/net/wireless/ath/ath10k/qmi.c
>> > @@ -931,9 +931,9 @@ static int ath10k_qmi_setup_msa_resources(struct
>> > ath10k_qmi *qmi, u32 msa_size)
>> > qmi->msa_mem_size = resource_size(&r);
>> > qmi->msa_va = devm_memremap(dev, qmi->msa_pa, qmi->msa_mem_size,
>> > MEMREMAP_WT);
>> > - if (!qmi->msa_va) {
>> > + if (IS_ERR(qmi->msa_va)) {
>> > dev_err(dev, "failed to map memory region: %pa\n",
>> > &r.start);
>> > - return -EBUSY;
>> > + return PTR_ERR(qmi->msa_va);
>>
>> That's a very good find!
>>
>> But how has this even worked before?
>
> This only changes the error path. Presumably it always succeeds in real
> life.
Ah, I missed the "!" operator. Yeah, I think you are correct. I'll queue
this for -next then.
--
Kalle Valo
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