[lkml]   [2022]   [Jun]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH v3 4/4] libata-scsi: Cap ata_device->max_sectors according to shost->max_sectors
ATA devices (struct ata_device) have a max_sectors field which is
configured internally in libata. This is then used to (re)configure the
associated sdev request queue max_sectors value from how it is earlier set
in __scsi_init_queue(). In __scsi_init_queue() the max_sectors value is set
according to shost limits, which includes host DMA mapping limits.

Cap the ata_device max_sectors according to shost->max_sectors to respect
this shost limit.

Signed-off-by: John Garry <>
Acked-by: Damien Le Moal <>
drivers/ata/libata-scsi.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 42cecf95a4e5..8b4b318f378d 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1060,6 +1060,7 @@ int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
dev->flags |= ATA_DFLAG_NO_UNLOAD;

/* configure max sectors */
+ dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors);
blk_queue_max_hw_sectors(q, dev->max_sectors);

if (dev->class == ATA_DEV_ATAPI) {
 \ /
  Last update: 2022-06-06 11:37    [W:0.807 / U:0.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site