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ipa3: Fix to save sgt table info in proper context

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Sg table tables are not contiguous page due to this while copying
total sg table it failing. To avoid this copying the each sg
table individually.

Acked-by: Akshay Pandit <pandit@codeaurora.org>
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>
This commit is contained in:
Akshay Pandit 2020-10-07 12:45:46 +05:30
commit 09b94adf7e
1 changed files with 8 additions and 2 deletions
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10
drivers/platform/msm/ipa/ipa_v3/ipa.c
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@ -384,6 +384,8 @@ int ipa_smmu_store_sgt(struct sg_table **out_ch_ptr,
struct sg_table *in_sgt_ptr)
{
unsigned int nents;
int i;
struct scatterlist *in_sg, *out_sg;
if (in_sgt_ptr != NULL) {
*out_ch_ptr = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
@ -401,8 +403,12 @@ int ipa_smmu_store_sgt(struct sg_table **out_ch_ptr,
return -ENOMEM;
}
memcpy((*out_ch_ptr)->sgl, in_sgt_ptr->sgl,
nents*sizeof((*out_ch_ptr)->sgl));
out_sg = (*out_ch_ptr)->sgl;
for_each_sg(in_sgt_ptr->sgl, in_sg, in_sgt_ptr->nents, i) {
memcpy(out_sg, in_sg, sizeof(struct scatterlist));
out_sg++;
}
(*out_ch_ptr)->nents = nents;
(*out_ch_ptr)->orig_nents = in_sgt_ptr->orig_nents;
}