update kernel to 5.10.198

hc

2024-01-03 2f7c68cb55ecb7331f2381deb497c27155f32faf

 kernel/arch/parisc/kernel/pci-dma.c
..
..
@@ -446,11 +446,27 @@
446
446
 void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
447
447
 		enum dma_data_direction dir)
448
448
 {
449
+	/*
450
+	 * fdc: The data cache line is written back to memory, if and only if
451
+	 * it is dirty, and then invalidated from the data cache.
452
+	 */
449
453
 	flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size);
450
454
 }
451
455
 
452
456
 void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
453
457
 		enum dma_data_direction dir)
454
458
 {
455
-	flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size);
459
+	unsigned long addr = (unsigned long) phys_to_virt(paddr);
460
+
461
+	switch (dir) {
462
+	case DMA_TO_DEVICE:
463
+	case DMA_BIDIRECTIONAL:
464
+		flush_kernel_dcache_range(addr, size);
465
+		return;
466
+	case DMA_FROM_DEVICE:
467
+		purge_kernel_dcache_range_asm(addr, addr + size);
468
+		return;
469
+	default:
470
+		BUG();
471
+	}
456
472
 }