diff options
| author | Christoph Hellwig <hch@lst.de> | 2024-04-09 16:37:31 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2024-04-11 21:37:48 -0400 |
| commit | 6248d7f7714f018f2c02f356582784e74596f8e8 (patch) | |
| tree | 3ed59a406d61d664e516b9709ce3f86aeb4d5b49 /drivers/usb | |
| parent | 7eaae991c30d46a4ea45aa00f50eba939d7f951b (diff) | |
scsi: core: Add a no_highmem flag to struct Scsi_Host
While we really should be killing the block layer bounce buffering ASAP, I
even more urgently need to stop the drivers to fiddle with the limits from
->slave_configure. Add a no_highmem flag to the Scsi_Host to centralize
this setting and switch the remaining four drivers that use block layer
bounce buffering to it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240409143748.980206-7-hch@lst.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/storage/scsiglue.c | 10 | ||||
| -rw-r--r-- | drivers/usb/storage/usb.c | 10 |
2 files changed, 10 insertions, 10 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index 12cf9940e5b6..1d14c678f3d3 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -40,7 +40,6 @@ #include <scsi/scsi_eh.h> #include "usb.h" -#include <linux/usb/hcd.h> #include "scsiglue.h" #include "debug.h" #include "transport.h" @@ -131,15 +130,6 @@ static int slave_configure(struct scsi_device *sdev) dma_max_mapping_size(dev) >> SECTOR_SHIFT)); /* - * Some USB host controllers can't do DMA; they have to use PIO. - * For such controllers we need to make sure the block layer sets - * up bounce buffers in addressable memory. - */ - if (!hcd_uses_dma(bus_to_hcd(us->pusb_dev->bus)) || - (bus_to_hcd(us->pusb_dev->bus)->localmem_pool != NULL)) - blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH); - - /* * We can't put these settings in slave_alloc() because that gets * called before the device type is known. Consequently these * settings can't be overridden via the scsi devinfo mechanism. diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index d1ad6a2509ab..a49a31639f6f 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -47,6 +47,7 @@ #include <scsi/scsi_device.h> #include "usb.h" +#include <linux/usb/hcd.h> #include "scsiglue.h" #include "transport.h" #include "protocol.h" @@ -961,6 +962,15 @@ int usb_stor_probe1(struct us_data **pus, if (result) goto BadDevice; + /* + * Some USB host controllers can't do DMA; they have to use PIO. + * For such controllers we need to make sure the block layer sets + * up bounce buffers in addressable memory. + */ + if (!hcd_uses_dma(bus_to_hcd(us->pusb_dev->bus)) || + bus_to_hcd(us->pusb_dev->bus)->localmem_pool) + host->no_highmem = true; + /* Get the unusual_devs entries and the descriptors */ result = get_device_info(us, id, unusual_dev); if (result) |