From 7c3e28bc56bd2e4310dc0af99f2b95eeda9a2ff7 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Mon, 16 Jun 2008 12:11:39 -0400 Subject: [PATCH] USB: use standard SG iterator in the scatter-gather library This patch (as1103) changes the iteration in the USB scatter-gather to use a standard SG iterator. Otherwise the iteration will fail if it encounters a chained SG list. Signed-off-by: Alan Stern Acked-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/message.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index 315363b744..08af1083eb 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -400,7 +400,7 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev, if (usb_pipein(pipe)) urb_flags |= URB_SHORT_NOT_OK; - for (i = 0; i < io->entries; i++) { + for_each_sg(sg, sg, io->entries, i) { unsigned len; io->urbs[i] = usb_alloc_urb(0, mem_flags); @@ -434,17 +434,17 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev, * to prevent stale pointers and to help spot bugs. */ if (dma) { - io->urbs[i]->transfer_dma = sg_dma_address(sg + i); - len = sg_dma_len(sg + i); + io->urbs[i]->transfer_dma = sg_dma_address(sg); + len = sg_dma_len(sg); #if defined(CONFIG_HIGHMEM) || defined(CONFIG_GART_IOMMU) io->urbs[i]->transfer_buffer = NULL; #else - io->urbs[i]->transfer_buffer = sg_virt(&sg[i]); + io->urbs[i]->transfer_buffer = sg_virt(sg); #endif } else { /* hc may use _only_ transfer_buffer */ - io->urbs[i]->transfer_buffer = sg_virt(&sg[i]); - len = sg[i].length; + io->urbs[i]->transfer_buffer = sg_virt(sg); + len = sg->length; } if (length) { -- 2.39.5