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SubjectRe: [PATCH 3/6] soc: qcom: smem: byte swap values properly
On Tue 10 Apr 15:25 PDT 2018, Alex Elder wrote:

> Two places report an error when a partition header is found to
> not contain the right canary value. The error messages do not
> properly byte swap the host ids. Fix this, and adjust the format
> specificier to match the 16-bit unsigned data type.
>
> Move the error handling for a bad canary value to the end of
> qcom_smem_alloc_private(). This avoids some long lines, and
> reduces the distraction of handling this unexpected problem.
>
> Signed-off-by: Alex Elder <elder@linaro.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
> drivers/soc/qcom/smem.c | 18 +++++++++---------
> 1 file changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
> index 3102aa94aec2..82f0908b90e1 100644
> --- a/drivers/soc/qcom/smem.c
> +++ b/drivers/soc/qcom/smem.c
> @@ -365,13 +365,8 @@ static int qcom_smem_alloc_private(struct qcom_smem *smem,
> cached = phdr_to_last_cached_entry(phdr);
>
> while (hdr < end) {
> - if (hdr->canary != SMEM_PRIVATE_CANARY) {
> - dev_err(smem->dev,
> - "Found invalid canary in hosts %d:%d partition\n",
> - phdr->host0, phdr->host1);
> - return -EINVAL;
> - }
> -
> + if (hdr->canary != SMEM_PRIVATE_CANARY)
> + goto bad_canary;
> if (le16_to_cpu(hdr->item) == item)
> return -EEXIST;
>
> @@ -400,6 +395,11 @@ static int qcom_smem_alloc_private(struct qcom_smem *smem,
> le32_add_cpu(&phdr->offset_free_uncached, alloc_size);
>
> return 0;
> +bad_canary:
> + dev_err(smem->dev, "Found invalid canary in hosts %hu:%hu partition\n",
> + le16_to_cpu(phdr->host0), le16_to_cpu(phdr->host1));
> +
> + return -EINVAL;
> }
>
> static int qcom_smem_alloc_global(struct qcom_smem *smem,
> @@ -563,8 +563,8 @@ static void *qcom_smem_get_private(struct qcom_smem *smem,
> return ERR_PTR(-ENOENT);
>
> invalid_canary:
> - dev_err(smem->dev, "Found invalid canary in hosts %d:%d partition\n",
> - phdr->host0, phdr->host1);
> + dev_err(smem->dev, "Found invalid canary in hosts %hu:%hu partition\n",
> + le16_to_cpu(phdr->host0), le16_to_cpu(phdr->host1));
>
> return ERR_PTR(-EINVAL);
> }
> --
> 2.14.1
>

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