[xtensa-cvscommit] linux/arch/xtensa/kernel pci-dma.c,1.2,1.3

[<ma...@us...>]

Update of /cvsroot/xtensa/linux/arch/xtensa/kernel
In directory sc8-pr-cvs1:/tmp/cvs-serv2825

Modified Files:
	pci-dma.c 
Log Message:
Use a safer cache invalidation call (_writeback_inv) for PCI DMA.
Using _invalidate can throw away dirty cache data, so much more
investigation is needed to guarantee it is safe to use here.



Index: pci-dma.c
===================================================================
RCS file: /cvsroot/xtensa/linux/arch/xtensa/kernel/pci-dma.c,v
retrieving revision 1.2
retrieving revision 1.3
diff -C2 -d -r1.2 -r1.3
*** pci-dma.c	17 Jan 2003 00:31:30 -0000	1.2
--- pci-dma.c	20 Mar 2003 20:47:35 -0000	1.3
***************
*** 52,56 ****
  		BUG();
  	case PCI_DMA_FROMDEVICE:        /* invalidate only */
! 		xthal_dcache_region_invalidate(vaddr, size);
  		break;
  	case PCI_DMA_TODEVICE:          /* writeback only */
--- 52,60 ----
  		BUG();
  	case PCI_DMA_FROMDEVICE:        /* invalidate only */
! 		/* perhaps not 100% safe? -- XTFIXME */
! 		/*xthal_dcache_region_invalidate(vaddr, size);*/
! 
! 		/* this is always safe: */
! 		xthal_dcache_region_writeback_inv(vaddr, size);
  		break;
  	case PCI_DMA_TODEVICE:          /* writeback only */