From 7207fea452cfdd2d4e2f4419e2c31f570edbade3 Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Thu, 13 Dec 2007 12:43:22 -0600 Subject: [SCSI] iscsi: Prettify resid handling and some extra checks - Check to see that OVERFLOW is not negative indicating a bug. - Unify handling of UNDERFLOW and OVERFLOW to the same code. - Also handle BIDI_OVERFLOW. Signed-off-by: Boaz Harrosh Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- drivers/scsi/libiscsi.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'drivers/scsi/libiscsi.c') diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 176458f35316..0beb4c620962 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -291,17 +291,19 @@ invalid_datalen: min_t(uint16_t, senselen, SCSI_SENSE_BUFFERSIZE)); } - if (rhdr->flags & ISCSI_FLAG_CMD_UNDERFLOW) { + if (rhdr->flags & (ISCSI_FLAG_CMD_UNDERFLOW | + ISCSI_FLAG_CMD_OVERFLOW)) { int res_count = be32_to_cpu(rhdr->residual_count); - if (res_count > 0 && res_count <= scsi_bufflen(sc)) + if (res_count > 0 && + (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW || + res_count <= scsi_bufflen(sc))) scsi_set_resid(sc, res_count); else sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status; - } else if (rhdr->flags & ISCSI_FLAG_CMD_BIDI_UNDERFLOW) + } else if (rhdr->flags & (ISCSI_FLAG_CMD_BIDI_UNDERFLOW | + ISCSI_FLAG_CMD_BIDI_OVERFLOW)) sc->result = (DID_BAD_TARGET << 16) | rhdr->cmd_status; - else if (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW) - scsi_set_resid(sc, be32_to_cpu(rhdr->residual_count)); out: debug_scsi("done [sc %lx res %d itt 0x%x]\n", -- cgit v1.2.3