patch-2.4.22 linux-2.4.22/arch/arm/kernel/dma.c
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- Lines: 41
- Date:
2003-08-25 04:44:39.000000000 -0700
- Orig file:
linux-2.4.21/arch/arm/kernel/dma.c
- Orig date:
2002-08-02 17:39:42.000000000 -0700
diff -urN linux-2.4.21/arch/arm/kernel/dma.c linux-2.4.22/arch/arm/kernel/dma.c
@@ -119,6 +119,10 @@
{
dma_t *dma = dma_chan + channel;
+ if (dma->active)
+ printk(KERN_ERR "dma%d: altering DMA SG while "
+ "DMA active\n", channel);
+
dma->sg = sg;
dma->sgcount = nr_sg;
dma->using_sg = 1;
@@ -217,6 +221,14 @@
BUG();
}
+/*
+ * Is the specified DMA channel active?
+ */
+int dma_channel_active(dmach_t channel)
+{
+ return dma_chan[channel].active;
+}
+
void set_dma_page(dmach_t channel, char pagenr)
{
printk(KERN_ERR "dma%d: trying to set_dma_page\n", channel);
@@ -272,6 +284,7 @@
GLOBAL_ALIAS(set_dma_sg, get_dma_residue);
GLOBAL_ALIAS(set_dma_speed, get_dma_residue);
GLOBAL_ALIAS(init_dma, get_dma_residue);
+GLOBAL_ALIAS(dma_channel_active, get_dma_residue);
#endif
@@ -286,3 +299,6 @@
EXPORT_SYMBOL(get_dma_residue);
EXPORT_SYMBOL(set_dma_sg);
EXPORT_SYMBOL(set_dma_speed);
+EXPORT_SYMBOL(dma_channel_active);
+
+EXPORT_SYMBOL(dma_spin_lock);
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