kernel/linux.git/drivers/misc/fastrpc.c, branch v5.2.1

Merge 5.1-rc6 into char-misc-next

2019-04-21T21:14:47+00:00

We want the fixes, and this resolves a merge error in the fastrpc driver. Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: add checked value for dma_set_mask

2019-04-02T15:56:54+00:00

There be should check return value from dma_set_mask to throw some info if fail to set dma mask. Detected by CoverityScan, CID# 1443983: Error handling issues (CHECKED_RETURN) Fixes: f6f9279f2bf0 ("misc: fastrpc: Add Qualcomm fastrpc basic driver model") Signed-off-by: Bo YU Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: increase max init file size to 64 MB

2019-03-27T17:09:58+00:00

In some cases where Neural Processing is required the size of init process exceeds default size of 2MB, increase this size to 64MB which is required for QCS404 CDSP Neural Processing. Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: fix remote page size calculation

2019-03-27T17:09:58+00:00

Remote page size should be calculated based on address and size, fix this! Without this we will endup with one page less in cases where the buffer is across 3 pages. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Reported-by: Krishnaiah Tadakamalla Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: take into account of overlapping buffers

2019-03-27T17:09:58+00:00

Argument buffers that are passed could be derived from a big buffer, and some of the arguments buffers could overlap each other. Take care of such instanaces. This is optimization that DSP expects while sending buffers which overlap. So make the DSP happy doing it. Without which DSP seems to crash. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: consider address offset before sending to DSP

2019-03-27T17:09:58+00:00

While passing address phy address to DSP, take care of the offset calculated from virtual address vma. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: use correct spinlock variant

2019-03-27T17:09:58+00:00

context spin lock can be interrupted from callback path so use correct spinlock so that we do not hit spinlock recursion. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: make sure memory read and writes are visible

2019-03-27T17:09:57+00:00

dma_alloc_coherent buffers could have writes queued in store buffers so commit them before sending buffer to DSP using correct dma barriers. Same with vice-versa. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: Fix a possible double free

2019-03-27T17:09:57+00:00

This patch fixes the error exit path of fastrpc_init_create_process(). If the DMA allocation or the DSP invoke fails the fastrpc_map was freed but not removed from the mapping list leading to a double free once the mapping list is emptied in fastrpc_device_release(). [srinivas kandagatla]: Cleaned up error path labels and reset init mem to NULL after free Fixes: d73f71c7c6ee("misc: fastrpc: Add support for create remote init process") Signed-off-by: Thierry Escande Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman

misc: fastrpc: Avoid free of DMA buffer in interrupt context

2019-03-27T17:09:57+00:00

When the remote DSP invocation is interrupted by the user, the associated DMA buffer can be freed in interrupt context causing a kernel BUG. This patch adds a worker thread associated to the fastrpc context. It is scheduled in the rpmsg callback to decrease its refcount out of the interrupt context. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Signed-off-by: Thierry Escande Signed-off-by: Srinivas Kandagatla Signed-off-by: Greg Kroah-Hartman