linux-stable.git/drivers/uio, branch linux-5.17.y

UIO: use default_groups in kobj_type

2021-12-29T09:54:50+00:00

There are currently 2 ways to create a set of sysfs files for a
kobj_type, through the default_attrs field, and the default_groups
field.  Move the UIO code to use default_groups field which has been the
preferred way since aa30f47cf666 ("kobject: Add support for default
attribute groups to kobj_type") so that we can soon get rid of the
obsolete default_attrs field.

Link: https://lore.kernel.org/r/20211228131319.249324-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman

uio: uio_dmem_genirq: Catch the Exception

2021-12-05T13:25:00+00:00

The return value of dma_set_coherent_mask() is not always 0.
To catch the exception in case that dma is not support the mask.

Fixes: 0a0c3b5a24bd ("Add new uio device for dynamic memory allocation")
Signed-off-by: Jiasheng Jiang 
Link: https://lore.kernel.org/r/20211204000326.1592687-1-jiasheng@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman

Drivers: hv: vmbus: Mark vmbus ring buffer visible to host in Isolation VM

2021-10-28T11:22:23+00:00

Mark vmbus ring buffer visible with set_memory_decrypted() when
establish gpadl handle.

Reviewed-by: Michael Kelley 
Signed-off-by: Tianyu Lan 
Link: https://lore.kernel.org/r/20211025122116.264793-5-ltykernel@gmail.com
Signed-off-by: Wei Liu

uio: Remove leading spaces in Kconfig

2021-05-21T12:52:37+00:00

Remove leading spaces before tabs in Kconfig file(s) by running the
following command:

  $ find drivers/uio -name 'Kconfig*' | xargs sed -r -i 's/^[ ]+\t/\t/'

Signed-off-by: Juerg Haefliger 
Link: https://lore.kernel.org/r/20210517095837.81783-1-juergh@canonical.com
Signed-off-by: Greg Kroah-Hartman

Merge 50f09a3dd587 ("Merge tag 'char-misc-5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc") into char-misc-next

2021-05-21T07:48:31+00:00

We want the char/misc driver fixes in here as well

Signed-off-by: Greg Kroah-Hartman

uio: uio_pci_generic: add memory resource mappings

2021-05-14T11:42:11+00:00

import memory resources from underlying pci device, thus allowing
userspace applications to memory map those resources.

without this change, current implementation, does not populate the
memory maps and are not shown under the corresponding sysfs uio entry:

root@apalis-imx8:~# echo "ad00 0122" > \
			/sys/bus/pci/drivers/uio_pci_generic/new_id
[   55.736433] uio_pci_generic 0000:01:00.0: enabling device (0000 -> 0002)
root@apalis-imx8:~# ls -lsrt /sys/class/uio/uio0/
     0 -rw-r--r--    1 root     root          4096 Apr 27 18:52 uevent
     0 -r--r--r--    1 root     root          4096 Apr 27 18:52 version
     0 -r--r--r--    1 root     root          4096 Apr 27 18:52 suppliers
     0 lrwxrwxrwx    1 root     root             0 Apr 27 18:52 subsystem
-> ../../../../../../../../../class/uio
     0 drwxr-xr-x    2 root     root             0 Apr 27 18:52 power
     0 -r--r--r--    1 root     root          4096 Apr 27 18:52 name
     0 -r--r--r--    1 root     root          4096 Apr 27 18:52 event
     0 lrwxrwxrwx    1 root     root             0 Apr 27 18:52 device
-> ../../../0000:01:00.0
     0 -r--r--r--    1 root     root          4096 Apr 27 18:52 dev
     0 -r--r--r--    1 root     root          4096 Apr 27 18:52 consumers
root@apalis-imx8:~#

with the proposed changed, have following instead:
root@apalis-imx8:~# ls -lsrt /sys/class/uio/uio0/
     0 -rw-r--r--    1 root     root          4096 Apr 27 19:06 uevent
     0 -r--r--r--    1 root     root          4096 Apr 27 19:06 version
     0 -r--r--r--    1 root     root          4096 Apr 27 19:06 suppliers
     0 lrwxrwxrwx    1 root     root             0 Apr 27 19:06 subsystem
-> ../../../../../../../../../class/uio
     0 drwxr-xr-x    2 root     root             0 Apr 27 19:06 power
     0 -r--r--r--    1 root     root          4096 Apr 27 19:06 name
     0 drwxr-xr-x    4 root     root             0 Apr 27 19:06 maps
     0 -r--r--r--    1 root     root          4096 Apr 27 19:06 event
     0 lrwxrwxrwx    1 root     root             0 Apr 27 19:06 device
-> ../../../0000:01:00.0
     0 -r--r--r--    1 root     root          4096 Apr 27 19:06 dev
     0 -r--r--r--    1 root     root          4096 Apr 27 19:06 consumers
root@apalis-imx8:~#

root@apalis-imx8:~# ls -lsrt /sys/class/uio/uio0/maps/
     0 drwxr-xr-x    2 root     root             0 Apr 27 19:07 map1
     0 drwxr-xr-x    2 root     root             0 Apr 27 19:07 map0
root@apalis-imx8:~#

root@apalis-imx8:~# cat /sys/class/uio/uio0/maps/map1/addr
0x0000000062000000
root@apalis-imx8:~#

root@apalis-imx8:~# cat /sys/class/uio/uio0/maps/map1/size
0x0000000000200000
root@apalis-imx8:~#

tested on AltaData ARINC 429 MiniPCIE module on imx8qm-apalis-ixora-v1.2

Signed-off-by: Firas Ashkar 
Link: https://lore.kernel.org/r/20210427201046.4005820-1-firas.ashkar@savoirfairelinux.com
Signed-off-by: Greg Kroah-Hartman

uio: uio_aec: Use pci_iounmap instead of iounmap

2021-05-14T11:39:47+00:00

'pci_iomap()' is used in the probe and 'pci_iounmap()' in the error
handling path of the probe.
So keep things consistent and use 'pci_iounmap()' also in the remove
function.

Fixes: 1bafeb378e91 ("uio: add the uio_aec driver")
Signed-off-by: Christophe JAILLET 
Link: https://lore.kernel.org/r/f6b2a09a45658e8ef552aa34f0b8615dc1c35838.1620546705.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman

uio_hv_generic: Fix another memory leak in error handling paths

2021-05-14T11:26:04+00:00

Memory allocated by 'vmbus_alloc_ring()' at the beginning of the probe
function is never freed in the error handling path.

Add the missing 'vmbus_free_ring()' call.

Note that it is already freed in the .remove function.

Fixes: cdfa835c6e5e ("uio_hv_generic: defer opening vmbus until first use")
Cc: stable 
Signed-off-by: Christophe JAILLET 
Link: https://lore.kernel.org/r/0d86027b8eeed8e6360bc3d52bcdb328ff9bdca1.1620544055.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman

uio_hv_generic: Fix a memory leak in error handling paths

2021-05-14T11:26:01+00:00

If 'vmbus_establish_gpadl()' fails, the (recv|send)_gpadl will not be
updated and 'hv_uio_cleanup()' in the error handling path will not be
able to free the corresponding buffer.

In such a case, we need to free the buffer explicitly.

Fixes: cdfa835c6e5e ("uio_hv_generic: defer opening vmbus until first use")
Cc: stable 
Signed-off-by: Christophe JAILLET 
Link: https://lore.kernel.org/r/4fdaff557deef6f0475d02ba7922ddbaa1ab08a6.1620544055.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman

uio/uio_pci_generic: fix return value changed in refactoring

2021-05-14T11:25:27+00:00

Commit ef84928cff58 ("uio/uio_pci_generic: use device-managed function
equivalents") was able to simplify various error paths thanks to no
longer having to clean up on the way out. Some error paths were dropped,
others were simplified. In one of those simplifications, the return
value was accidentally changed from -ENODEV to -ENOMEM. Restore the old
return value.

Fixes: ef84928cff58 ("uio/uio_pci_generic: use device-managed function equivalents")
Cc: stable 
Acked-by: Michael S. Tsirkin 
Signed-off-by: Martin Ågren 
Link: https://lore.kernel.org/r/20210422192240.1136373-1-martin.agren@gmail.com
Signed-off-by: Greg Kroah-Hartman