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authorAkinobu Mita <akinobu.mita@gmail.com>2014-06-02 17:56:48 +0400
committerChristoph Hellwig <hch@lst.de>2014-07-18 00:07:30 +0400
commit8ed5a4d2f7d8b296a22fed7ec2b543c0500d13be (patch)
treedc961ca6a6098eac84e132abb09db687c700e87b /include/scsi/scsi_host.h
parente430cbc8bbd779454516467b2947a97b4003c081 (diff)
downloadlinux-8ed5a4d2f7d8b296a22fed7ec2b543c0500d13be.tar.xz
scsi: increase upper limit for max_sectors
max_sectors in struct Scsi_Host specifies maximum number of sectors allowed in a single SCSI command. The data type of max_sectors is unsigned short, so the maximum transfer length per SCSI command is limited to less than 256MB in 4096-bytes sector size. (0xffff * 4096) This commit increases the SCSI mid level's limitation for max_sectors upto the block layer's limitation for max_hw_sectors by extending the data type of max_sectors in struct Scsi_Host and scsi_host_template, so that SCSI lower level drivers can specify more than 0xffff. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/scsi/scsi_host.h')
-rw-r--r--include/scsi/scsi_host.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 94844fc77b97..db7d8bd2f86f 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -408,7 +408,7 @@ struct scsi_host_template {
/*
* Set this if the host adapter has limitations beside segment count.
*/
- unsigned short max_sectors;
+ unsigned int max_sectors;
/*
* DMA scatter gather segment boundary limit. A segment crossing this
@@ -652,7 +652,7 @@ struct Scsi_Host {
short cmd_per_lun;
short unsigned int sg_tablesize;
short unsigned int sg_prot_tablesize;
- short unsigned int max_sectors;
+ unsigned int max_sectors;
unsigned long dma_boundary;
/*
* Used to assign serial numbers to the cmds.