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authorJeremy Kerr <jk@ozlabs.org>2018-02-20 14:48:44 +1030
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2018-06-12 14:04:26 +1000
commite5538139e043bcae133da1e55f02b0646eb601fa (patch)
tree7f448d4c9f367d8333e85312d551e279f5f1e612 /ipc
parente212ab47bd029466ad758a24831e3046a34ebda1 (diff)
downloadlinux-e5538139e043bcae133da1e55f02b0646eb601fa.tar.bz2
fsi: gpio: Use a mutex to protect transfers
Reduce time spent with interrupts disabled by limiting the critical sections to bitbanging FSI symbols. We only need to ensure exclusive use of the bus for an entire transfer, not that the transfer be performed in atomic context. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Joel Stanley <joel@jms.id.au>
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