From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/arch/arm/plat-pxa/dma.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) (limited to 'kernel/arch/arm/plat-pxa/dma.c') diff --git a/kernel/arch/arm/plat-pxa/dma.c b/kernel/arch/arm/plat-pxa/dma.c index d92f07f6e..de2b06188 100644 --- a/kernel/arch/arm/plat-pxa/dma.c +++ b/kernel/arch/arm/plat-pxa/dma.c @@ -289,7 +289,8 @@ int pxa_request_dma (char *name, pxa_dma_prio prio, /* try grabbing a DMA channel with the requested priority */ for (i = 0; i < num_dma_channels; i++) { if ((dma_channels[i].prio == prio) && - !dma_channels[i].name) { + !dma_channels[i].name && + !pxad_toggle_reserved_channel(i)) { found = 1; break; } @@ -326,13 +327,14 @@ void pxa_free_dma (int dma_ch) local_irq_save(flags); DCSR(dma_ch) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR; dma_channels[dma_ch].name = NULL; + pxad_toggle_reserved_channel(dma_ch); local_irq_restore(flags); } EXPORT_SYMBOL(pxa_free_dma); static irqreturn_t dma_irq_handler(int irq, void *dev_id) { - int i, dint = DINT; + int i, dint = DINT, done = 0; struct dma_channel *channel; while (dint) { @@ -341,16 +343,13 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id) channel = &dma_channels[i]; if (channel->name && channel->irq_handler) { channel->irq_handler(i, channel->data); - } else { - /* - * IRQ for an unregistered DMA channel: - * let's clear the interrupts and disable it. - */ - printk (KERN_WARNING "spurious IRQ for DMA channel %d\n", i); - DCSR(i) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR; + done++; } } - return IRQ_HANDLED; + if (done) + return IRQ_HANDLED; + else + return IRQ_NONE; } int __init pxa_init_dma(int irq, int num_ch) @@ -372,7 +371,8 @@ int __init pxa_init_dma(int irq, int num_ch) spin_lock_init(&dma_channels[i].lock); } - ret = request_irq(irq, dma_irq_handler, 0, "DMA", NULL); + ret = request_irq(irq, dma_irq_handler, IRQF_SHARED, "DMA", + dma_channels); if (ret) { printk (KERN_CRIT "Wow! Can't register IRQ for DMA\n"); kfree(dma_channels); -- cgit 1.2.3-korg