The patch below does not apply to the 3.5-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 1a5fa4576ec8a462313c7516b31d7453481ddbe8 Mon Sep 17 00:00:00 2001 From: Roland Dreier <[email protected]> Date: Mon, 16 Jul 2012 15:34:23 -0700 Subject: [PATCH] target: Fix reading of data length fields for UNMAP commands The UNMAP DATA LENGTH and UNMAP BLOCK DESCRIPTOR DATA LENGTH fields are in the unmap descriptor (the payload transferred to our data out buffer), not in the CDB itself. Read them from the correct place in target_emulated_unmap. Signed-off-by: Roland Dreier <[email protected]> Cc: [email protected] Signed-off-by: Nicholas Bellinger <[email protected]> diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c index 8fb3822..e6d08ee 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -324,7 +324,6 @@ static int iblock_execute_unmap(struct se_cmd *cmd) struct se_device *dev = cmd->se_dev; struct iblock_dev *ibd = dev->dev_ptr; unsigned char *buf, *ptr = NULL; - unsigned char *cdb = &cmd->t_task_cdb[0]; sector_t lba; unsigned int size = cmd->data_length, range; int ret = 0, offset; @@ -333,11 +332,12 @@ static int iblock_execute_unmap(struct se_cmd *cmd) /* First UNMAP block descriptor starts at 8 byte offset */ offset = 8; size -= 8; - dl = get_unaligned_be16(&cdb[0]); - bd_dl = get_unaligned_be16(&cdb[2]); buf = transport_kmap_data_sg(cmd); + dl = get_unaligned_be16(&buf[0]); + bd_dl = get_unaligned_be16(&buf[2]); + ptr = &buf[offset]; pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
