From 1f6f31a03e3aed0854a6aa3ab763c3d3b2ff42ff Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 11 May 2007 12:33:09 +0200 Subject: USB storage: sg chaining support [PATCH] USB storage: sg chaining support Modify usb_stor_access_xfer_buf() to take a pointer to an sg entry pointer, so we can keep track of that instead of passing around an integer index (which we can't use when dealing with multiple scatterlist arrays). Signed-off-by: Jens Axboe --- drivers/usb/storage/jumpshot.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'drivers/usb/storage/jumpshot.c') diff --git a/drivers/usb/storage/jumpshot.c b/drivers/usb/storage/jumpshot.c index 003fcf545888..61097cbb1585 100644 --- a/drivers/usb/storage/jumpshot.c +++ b/drivers/usb/storage/jumpshot.c @@ -119,7 +119,8 @@ static int jumpshot_read_data(struct us_data *us, unsigned char thistime; unsigned int totallen, alloclen; int len, result; - unsigned int sg_idx = 0, sg_offset = 0; + unsigned int sg_offset = 0; + struct scatterlist *sg = NULL; // we're working in LBA mode. according to the ATA spec, // we can support up to 28-bit addressing. I don't know if Jumpshot @@ -170,7 +171,7 @@ static int jumpshot_read_data(struct us_data *us, // Store the data in the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &sg_idx, &sg_offset, TO_XFER_BUF); + &sg, &sg_offset, TO_XFER_BUF); sector += thistime; totallen -= len; @@ -195,7 +196,8 @@ static int jumpshot_write_data(struct us_data *us, unsigned char thistime; unsigned int totallen, alloclen; int len, result, waitcount; - unsigned int sg_idx = 0, sg_offset = 0; + unsigned int sg_offset = 0; + struct scatterlist *sg = NULL; // we're working in LBA mode. according to the ATA spec, // we can support up to 28-bit addressing. I don't know if Jumpshot @@ -225,7 +227,7 @@ static int jumpshot_write_data(struct us_data *us, // Get the data from the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &sg_idx, &sg_offset, FROM_XFER_BUF); + &sg, &sg_offset, FROM_XFER_BUF); command[0] = 0; command[1] = thistime; -- cgit v1.2.2