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Commit fd1e84e8 authored by Ghanim Fodi's avatar Ghanim Fodi
Browse files

msm: ipa: use GFP_ATOMIC for DMA memory allocation during SSR 



SSR logic is executed during device shutdown. During device
shutdown the Linux tasks (processes) are moving to SIGKILL
state. If a DMA allocation from the kernel happens
in a context of a process in SIGKILL state and page migration
is needed, the allocation will fail.
Use GFP_ATOMIC allocation flag during SSR. This will
utilize the atomic memory pool and will not require page
migration.

CRs-fixed: 1077811
Change-Id: Ie06b85d1f9d0a230c3d3832b6f0bbcdefc520c1e
Signed-off-by: default avatarGhanim Fodi <gfodi@codeaurora.org>
parent ef3068bf

drivers/platform/msm/ipa/ipa_v2/ipa.c

+1 −1
Original line number Diff line number Diff line
@@ -1837,7 +1837,7 @@ static int ipa_q6_clean_q6_tables(void) 
	u32 max_cmds = ipa_get_max_flt_rt_cmds(ipa_ctx->ipa_num_pipes);



	mem.base = dma_alloc_coherent(ipa_ctx->pdev, 4, &mem.phys_base,

		GFP_KERNEL);

		GFP_ATOMIC);

	if (!mem.base) {

		IPAERR("failed to alloc DMA buff of size 4\n");

		return -ENOMEM;

drivers/platform/msm/ipa/ipa_v3/ipa.c

+1 −1
Original line number Diff line number Diff line
@@ -2088,7 +2088,7 @@ static int ipa3_q6_clean_q6_tables(void) 


	mem.size = IPA_HW_TBL_HDR_WIDTH;

	mem.base = dma_alloc_coherent(ipa3_ctx->pdev, mem.size,

		&mem.phys_base, GFP_KERNEL);

		&mem.phys_base, GFP_ATOMIC);

	if (!mem.base) {

		IPAERR("failed to alloc DMA buff of size %d\n", mem.size);

		return -ENOMEM;