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SubjectRe: [PATCH 1/3] drivers: remoteproc: Make mdt_loader firmware authentication optional
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Hi Bjorn,
Thanks for the review !

On 7/26/2017 11:41 PM, Bjorn Andersson wrote:
> On Thu 29 Jun 07:17 PDT 2017, Sricharan R wrote:
>
>> qcom_mdt_load function loads the mdt type firmware and
>> authenticates it as well. Make the authentication only
>> when requested by the caller, so that the function can be used
>> by self-authenticating remoteproc as well.
>>
>
> This is good, we should be able to save some duplication the current
> MSA PIL as well by this.
>
>> Signed-off-by: Sricharan R <sricharan@codeaurora.org>
>> ---
>> drivers/remoteproc/qcom_adsp_pil.c | 3 ++-
>> drivers/remoteproc/qcom_wcnss.c | 3 ++-
>> drivers/soc/qcom/mdt_loader.c | 24 ++++++++++++++----------
>> include/linux/soc/qcom/mdt_loader.h | 2 +-
>
> We have two additional callers being merged, so changing the prototype
> of qcom_mdt_load() will cause issues.
>
> I think the best approach is to leave all callers untouched, make the
> current implementation of qcom_mdt_load() internal and provide two
> exported wrapper functions: qcom_mdt_load() and qcom_mdt_load_no_init().
>
> These wrappers would call the internal function with the appropriate
> value of the boolean.
>

ok, will do.

> [..]
>> diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c
> [..]
>> int qcom_mdt_load(struct device *dev, const struct firmware *fw,
>> const char *firmware, int pas_id, void *mem_region,
>> - phys_addr_t mem_phys, size_t mem_size)
>> + phys_addr_t mem_phys, size_t mem_size, bool auth)
>
> We're not authenticating even with @auth=true, so please name this
> "pas_init".
>

ok will rename.

>> {
>> const struct elf32_phdr *phdrs;
>> const struct elf32_phdr *phdr;
> [..]
>> @@ -142,12 +144,14 @@ int qcom_mdt_load(struct device *dev, const struct firmware *fw,
>> }
>>
>> if (relocate) {
>> - ret = qcom_scm_pas_mem_setup(pas_id, mem_phys, max_addr - min_addr);
>> - if (ret) {
>> - dev_err(dev, "unable to setup relocation\n");
>> - goto out;
>> + if (auth) {
>> + ret = qcom_scm_pas_mem_setup(pas_id, mem_phys,
>> + max_addr - min_addr);
>> + if (ret) {
>> + dev_err(dev, "unable to setup relocation\n");
>> + goto out;
>> + }
>> }
>> -
>
> I like this empty line, please let me have it.
>

ok.

Regards,
Sricharan

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