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| author | Alan Stern <stern@rowland.harvard.edu> | 2008-06-16 12:11:39 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-07-21 15:16:32 -0700 |
| commit | 7c3e28bc56bd2e4310dc0af99f2b95eeda9a2ff7 (patch) | |
| tree | 99dd471065e315f2a88a1c7b6b2ab4c4ef7302db /drivers/usb | |
| parent | 625f694936cbbdee98e6cc65f72724a7660e7946 (diff) | |
| download | linux-3.10-7c3e28bc56bd2e4310dc0af99f2b95eeda9a2ff7.tar.gz linux-3.10-7c3e28bc56bd2e4310dc0af99f2b95eeda9a2ff7.tar.bz2 linux-3.10-7c3e28bc56bd2e4310dc0af99f2b95eeda9a2ff7.zip | |
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 <stern@rowland.harvard.edu>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/message.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index 315363b744a..08af1083ebf 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) { |