dmaengine: at_hdmac: replace spin_lock* with irqsave variants
authorNicolas Ferre <nicolas.ferre@atmel.com>
Wed, 27 Jul 2011 12:21:28 +0000 (12:21 +0000)
committerVinod Koul <vinod.koul@intel.com>
Fri, 19 Aug 2011 13:09:48 +0000 (18:09 +0530)
commitd8cb04b070c2a55f7201714d231cff4f8f9fbd16
treecf5e6ee10c1e05ef0c61cc3bd2fa2538dfba2756
parentef298c21c0d9c06ed89ea2fa724c3a018acfff39
dmaengine: at_hdmac: replace spin_lock* with irqsave variants

dmaengine routines can be called from interrupt context and with
interrupts disabled. Whereas spin_unlock_bh can't be called from
such contexts. So this patch converts all spin_lock* routines
to irqsave variants.

Also, spin_lock() used in tasklet is converted to irqsave variants,
as tasklet can be interrupted, and dma requests from such interruptions
may also call spin_lock.

Idea from dw_dmac patch by Viresh Kumar.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Uwe Kleine-K├Ânig <u.kleine-koenig@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
drivers/dma/at_hdmac.c