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soc: qcom: mem-buf: Treat zero-sized sg-lists as invalid inputs

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When unmapping memory in S1, treat zero-sized sg-lists as invalid
inputs.

Change-Id: I477cd0808eea1200873c50470c8b73d9162428e4
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
This commit is contained in:
Isaac J. Manjarres 2020-06-16 10:52:24 -07:00
commit 53d312da45
1 changed files with 2 additions and 2 deletions
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4
drivers/soc/qcom/mem-buf.c
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@ -992,7 +992,7 @@ static int mem_buf_map_mem_s1(struct hh_sgl_desc *sgl_desc)
u64 base, size;
struct mhp_restrictions restrictions = {};
if (!sgl_desc)
if (!sgl_desc || !sgl_desc->n_sgl_entries)
return -EINVAL;
pr_debug("%s: Creating CPU MMU stage 1 mappings\n", __func__);
@ -1048,7 +1048,7 @@ static int mem_buf_unmap_mem_s1(struct hh_sgl_desc *sgl_desc)
unsigned int i, nid;
u64 base, size;
if (!sgl_desc)
if (!sgl_desc || !sgl_desc->n_sgl_entries)
return -EINVAL;
pr_debug("%s: Removing CPU MMU stage 1 mappings\n", __func__);