From: Miles Chen
This change exports dma_alloc_from_contiguous and
dma_release_from_contiguous to modules.
Currently, we can add a reserve a memory node in dts files, make
it a CMA memory by setting compatible = "shared-dma-pool",
and setup the dev->cma_area by using of_reserved_mem_device_init_
From: Miles Chen
Marty reported a memory leakage introduced by commit 3aaabbf1c39e
("lib/dma-debug.c: fix incorrect pfn calculation"). Fix it
by checking the virtual address before allocating the entry.
This patch also use virt_addr_valid() instead of virt_to_page()
to check if a virtual address
From: Miles Chen
dma-debug reports the following warning:
[name:panic&]WARNING: CPU: 3 PID: 298 at kernel-4.4/lib/dma-debug.c:604
debug _dma_assert_idle+0x1a8/0x230()
DMA-API: cpu touching an active dma mapped cacheline [cln=0x0882300]
CPU: 3 PID: 298 Comm: vold Tainted: GW O4.4
From: Miles Chen
Coverity found that the commit 3aaabbf1c39e ("lib/dma-debug.c:
fix incorrect pfn calculation") uses incorrect API to check
if a given address is a linear address.
The condition should be: (as discussed in Christoph's review)
if (!is_vmalloc_addr(virt) && !virt_addr_valid(virt))
n
From: Miles Chen
dma-debug reports the following warning:
[name:panic&]WARNING: CPU: 3 PID: 298 at kernel-4.4/lib/dma-debug.c:604
debug _dma_assert_idle+0x1a8/0x230()
DMA-API: cpu touching an active dma mapped cacheline [cln=0x0882300]
CPU: 3 PID: 298 Comm: vold Tainted: GW O4.4
From: Miles Chen
dma-debug reports the following warning:
[name:panic&]WARNING: CPU: 3 PID: 298 at kernel-4.4/lib/dma-debug.c:604
debug _dma_assert_idle+0x1a8/0x230()
DMA-API: cpu touching an active dma mapped cacheline [cln=0x0882300]
CPU: 3 PID: 298 Comm: vold Tainted: GW O4.4
From: Miles Chen
dma-debug report the following warning:
[name:panic&]WARNING: CPU: 3 PID: 298 at kernel-4.4/lib/dma-debug.c:604
debug _dma_assert_idle+0x1a8/0x230()
DMA-API: cpu touching an active dma mapped cacheline [cln=0x0882300]
CPU: 3 PID: 298 Comm: vold Tainted: GW O4.4.
From: Miles Chen
dma-debug report the following warning:
[name:panic&]WARNING: CPU: 3 PID: 298 at kernel-4.4/lib/dma-debug.c:604
debug _dma_assert_idle+0x1a8/0x230()
DMA-API: cpu touching an active dma mapped cacheline [cln=0x0882300]
CPU: 3 PID: 298 Comm: vold Tainted: GW O4.4.
