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bus: mhi: ep: Do not allocate memory for MHI objects from DMA zone

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[ Upstream commit c7d0b2db5bc5e8c0fdc67b3c8f463c3dfec92f77 ]

MHI endpoint stack accidentally started allocating memory for objects from
DMA zone since commit 62210a26cd4f ("bus: mhi: ep: Use slab allocator
where applicable"). But there is no real need to allocate memory from this
naturally limited DMA zone. This also causes the MHI endpoint stack to run
out of memory while doing high bandwidth transfers.

So let's switch over to normal memory.

Cc: <stable@vger.kernel.org> # 6.8
Fixes: 62210a26cd4f ("bus: mhi: ep: Use slab allocator where applicable")
Reviewed-by: Mayank Rana <quic_mrana@quicinc.com>
Link: https://lore.kernel.org/r/20240603164354.79035-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Manivannan Sadhasivam
2024-06-03 22:13:54 +05:30
committed by Greg Kroah-Hartman
parent 39601f49c9
commit 43987659fa
1 changed files with 7 additions and 7 deletions
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14
drivers/bus/mhi/ep/main.c
View File

@@ -74,7 +74,7 @@ static int mhi_ep_send_completion_event(struct mhi_ep_cntrl *mhi_cntrl, struct m
struct mhi_ring_element *event;
int ret;
event = kmem_cache_zalloc(mhi_cntrl->ev_ring_el_cache, GFP_KERNEL | GFP_DMA);
event = kmem_cache_zalloc(mhi_cntrl->ev_ring_el_cache, GFP_KERNEL);
if (!event)
return -ENOMEM;
@@ -93,7 +93,7 @@ int mhi_ep_send_state_change_event(struct mhi_ep_cntrl *mhi_cntrl, enum mhi_stat
struct mhi_ring_element *event;
int ret;
event = kmem_cache_zalloc(mhi_cntrl->ev_ring_el_cache, GFP_KERNEL | GFP_DMA);
event = kmem_cache_zalloc(mhi_cntrl->ev_ring_el_cache, GFP_KERNEL);
if (!event)
return -ENOMEM;
@@ -111,7 +111,7 @@ int mhi_ep_send_ee_event(struct mhi_ep_cntrl *mhi_cntrl, enum mhi_ee_type exec_e
struct mhi_ring_element *event;
int ret;
event = kmem_cache_zalloc(mhi_cntrl->ev_ring_el_cache, GFP_KERNEL | GFP_DMA);
event = kmem_cache_zalloc(mhi_cntrl->ev_ring_el_cache, GFP_KERNEL);
if (!event)
return -ENOMEM;
@@ -130,7 +130,7 @@ static int mhi_ep_send_cmd_comp_event(struct mhi_ep_cntrl *mhi_cntrl, enum mhi_e
struct mhi_ring_element *event;
int ret;
event = kmem_cache_zalloc(mhi_cntrl->ev_ring_el_cache, GFP_KERNEL | GFP_DMA);
event = kmem_cache_zalloc(mhi_cntrl->ev_ring_el_cache, GFP_KERNEL);
if (!event)
return -ENOMEM;
@@ -422,7 +422,7 @@ static int mhi_ep_read_channel(struct mhi_ep_cntrl *mhi_cntrl,
read_offset = mhi_chan->tre_size - mhi_chan->tre_bytes_left;
write_offset = len - buf_left;
buf_addr = kmem_cache_zalloc(mhi_cntrl->tre_buf_cache, GFP_KERNEL | GFP_DMA);
buf_addr = kmem_cache_zalloc(mhi_cntrl->tre_buf_cache, GFP_KERNEL);
if (!buf_addr)
return -ENOMEM;
@@ -1460,14 +1460,14 @@ int mhi_ep_register_controller(struct mhi_ep_cntrl *mhi_cntrl,
mhi_cntrl->ev_ring_el_cache = kmem_cache_create("mhi_ep_event_ring_el",
sizeof(struct mhi_ring_element), 0,
SLAB_CACHE_DMA, NULL);
0, NULL);
if (!mhi_cntrl->ev_ring_el_cache) {
ret = -ENOMEM;
goto err_free_cmd;
}
mhi_cntrl->tre_buf_cache = kmem_cache_create("mhi_ep_tre_buf", MHI_EP_DEFAULT_MTU, 0,
SLAB_CACHE_DMA, NULL);
0, NULL);
if (!mhi_cntrl->tre_buf_cache) {
ret = -ENOMEM;
goto err_destroy_ev_ring_el_cache;