From 21fc0b9f9de43c761d8c86bb481abd99053daced Mon Sep 17 00:00:00 2001 From: Eli Billauer Date: Sat, 16 Aug 2014 18:57:59 +0300 Subject: [PATCH] staging: xillybus: Removed write memory barriers before wait_event_*() According to Documentation/memory-barriers.txt, a memory barrier is put in place by wait_event_*() Signed-off-by: Eli Billauer Signed-off-by: Greg Kroah-Hartman --- drivers/staging/xillybus/xillybus_core.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/staging/xillybus/xillybus_core.c b/drivers/staging/xillybus/xillybus_core.c index bee58a2db310..f48e4de0ca3a 100644 --- a/drivers/staging/xillybus/xillybus_core.c +++ b/drivers/staging/xillybus/xillybus_core.c @@ -634,7 +634,6 @@ static int xilly_obtain_idt(struct xilly_endpoint *endpoint) channel = endpoint->channels[1]; /* This should be generated ad-hoc */ channel->wr_sleepy = 1; - wmb(); /* Setting wr_sleepy must come before the command */ iowrite32(1 | (3 << 24), /* Opcode 3 for channel 0 = Send IDT */ @@ -1968,7 +1967,7 @@ EXPORT_SYMBOL(xillybus_init_endpoint); static int xilly_quiesce(struct xilly_endpoint *endpoint) { endpoint->idtlen = -1; - wmb(); /* Make sure idtlen is set before sending command */ + iowrite32((u32) (endpoint->dma_using_dac & 0x0001), endpoint->registers + fpga_dma_control_reg); @@ -2029,8 +2028,6 @@ int xillybus_endpoint_discovery(struct xilly_endpoint *endpoint) endpoint->idtlen = -1; - smp_wmb(); - /* * Set DMA 32/64 bit mode, quiesce the device (?!) and get IDT * buffer size. -- 2.39.5