Commit e2c7b433 authored by Yadan Fan's avatar Yadan Fan Committed by Martin K. Petersen

scsi: hpsa: limit transfer length to 1MB

The hpsa firmware will bypass the cache for any request larger than 1MB,
so we should cap the request size to avoid any performance degradation
in kernels later than v4.3

This degradation is caused from d2be537c,
which changed max_sectors_kb to 1280k, but the hardware is able to work
fine with it, so the true fix should be from hpsa driver.
Signed-off-by: default avatarYadan Fan <ydfan@suse.com>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Acked-by: default avatarDon Brace <don.brace@microsemi.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 6f37e210
...@@ -938,7 +938,7 @@ static struct scsi_host_template hpsa_driver_template = { ...@@ -938,7 +938,7 @@ static struct scsi_host_template hpsa_driver_template = {
#endif #endif
.sdev_attrs = hpsa_sdev_attrs, .sdev_attrs = hpsa_sdev_attrs,
.shost_attrs = hpsa_shost_attrs, .shost_attrs = hpsa_shost_attrs,
.max_sectors = 8192, .max_sectors = 1024,
.no_write_same = 1, .no_write_same = 1,
}; };
......
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