Commit 04a512fe authored by Alex Elder's avatar Alex Elder Committed by Andy Gross
Browse files

soc: qcom: smem: byte swap values properly 



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: default avatarAlex Elder <elder@linaro.org>
Reviewed-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: default avatarAndy Gross <andy.gross@linaro.org>
parent e221a1da

drivers/soc/qcom/smem.c

+9 −9
Original line number Diff line number Diff line
@@ -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);

}

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