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authorAmitkumar Karwar <akarwar@marvell.com>2017-01-24 19:05:45 +0530
committerKalle Valo <kvalo@codeaurora.org>2017-01-28 09:10:04 +0200
commitcc37d8efd2ba3a4cf395a727935f920c00b6f1a2 (patch)
tree43131ae631b12d93cc23465bcb2912318e4c104e /tools/perf/perf-sys.h
parent3e66849865edca1d04c9c6227b9153e9bdbdaec0 (diff)
mwifiex: use pci_dma_sync_single* APIs
On some platforms, driver is unable read sleep cookie signature even if firmware has written it through DMA. The problem is fixed by using pci_dma_sync_single* APIs while reading DMA buffer shared with firmware. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'tools/perf/perf-sys.h')
0 files changed, 0 insertions, 0 deletions
pl330_free_chan_resources'. This avoids the double-lock by acquiring a different lock than `dma_pl330_rqcb'. NOTE that, as a result, `pl330_free_chan_resources' executes `list_splice_tail_init' on `pch->work_list' under lock `pl330->lock', whereas in the rest of the code `pch->work_list' is protected by `pch->lock'. I don't know if this may cause race conditions. Similarly `pch->cyclic' is written by `pl330_alloc_chan_resources' under `pl330->lock' but read by `pl330_tx_submit' under `pch->lock'. Second, I have removed locking from `pl330_request_channel' and `pl330_release_channel' functions. Function `pl330_request_channel' is only called from `pl330_alloc_chan_resources', so the lock is already held. Function `pl330_release_channel' is called from `pl330_free_chan_resources', which already holds the lock, and from `pl330_del'. Function `pl330_del' is called in an error path of `pl330_probe' and at the end of `pl330_remove', but I assume that there cannot be concurrent accesses to the protected data at those points. Signed-off-by: Iago Abal <mail@iagoabal.eu> Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'kernel/irq/pm.c')