g2dma: Fixed race condition for DMA progress checking.

DC-SWAT · QuzarDC · commit 8fb6ea27eb3f · 2025-09-28T22:17:55.000-04:00
diff --git a/kernel/arch/dreamcast/hardware/g2dma.c b/kernel/arch/dreamcast/hardware/g2dma.c
@@ -184,6 +184,7 @@ int g2_dma_transfer(void *sh4, void *g2bus, size_t length, uint32_t block,
         errno = EFAULT;
         return -1;
     }
+    irq_disable_scoped();
 
     /* Make sure we're not already DMA'ing */
     if(dma_progress[g2chn] != 0) {

Original file line number	Diff line number	Diff line change
`@@ -184,6 +184,7 @@ int g2_dma_transfer(void sh4, void g2bus, size_t length, uint32_t block,`
`184`	`184`	`errno = EFAULT;`
`185`	`185`	`return -1;`
`186`	`186`	`}`
	`187`	`+ irq_disable_scoped();`
`187`	`188`
`188`	`189`	`/* Make sure we're not already DMA'ing */`
`189`	`190`	`if(dma_progress[g2chn] != 0) {`