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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2014-06-02 15:56:48 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-07-17 22:07:30 +0200 |
| commit | 8ed5a4d2f7d8b296a22fed7ec2b543c0500d13be (patch) | |
| tree | dc961ca6a6098eac84e132abb09db687c700e87b /include/scsi | |
| parent | sd: use READ_16 or WRITE_16 when transfer length is greater than 0xffff (diff) | |
| download | linux-8ed5a4d2f7d8b296a22fed7ec2b543c0500d13be.tar.xz linux-8ed5a4d2f7d8b296a22fed7ec2b543c0500d13be.zip | |
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')
| -rw-r--r-- | include/scsi/scsi_host.h | 4 |
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. |