linux-toradex.git/drivers/misc, branch v5.15-rc3

misc: bcm-vk: fix tty registration race

2021-09-21T14:17:15+00:00

Make sure to set the tty class-device driver data before registering the
tty to avoid having a racing open() dereference a NULL pointer.

Fixes: 91ca10d6fa07 ("misc: bcm-vk: add ttyVK support")
Cc: stable@vger.kernel.org      # 5.12
Signed-off-by: Johan Hovold 
Link: https://lore.kernel.org/r/20210917115736.5816-1-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman

habanalabs: expose a single cs seq in staged submissions

2021-09-14T12:00:04+00:00

Staged submission consists of multiple command submissions.
In order to be explicit, driver should return a single cs sequence
for every cs in the submission, or else user may try to wait on
an internal CS rather than waiting for the whole submission.

Signed-off-by: Ofir Bitton 
Reviewed-by: Oded Gabbay 
Signed-off-by: Oded Gabbay

habanalabs: fix wait offset handling

2021-09-14T12:00:04+00:00

Add handling for case where the user doesn't set wait offset,
and keeps it as 0. In such a case the driver will decrement one
from this zero value which will cause the code to wait for
wrong number of signals.

The solution is to treat this case as in legacy wait cs,
and wait for the next signal.

Signed-off-by: farah kassabri 
Reviewed-by: Oded Gabbay 
Signed-off-by: Oded Gabbay

habanalabs: rate limit multi CS completion errors

2021-09-14T12:00:04+00:00

As user can send wrong arguments to multi CS API, we rate limit
the amount of errors dumped to dmesg, in addition we change the
severity to warning.

Signed-off-by: Ofir Bitton 
Reviewed-by: Oded Gabbay 
Signed-off-by: Oded Gabbay

habanalabs/gaudi: fix LBW RR configuration

2021-09-14T12:00:04+00:00

Couple of fixes to the LBW RR configuration:

1. Add missing configuration of the SM RR registers in the DMA_IF.
2. Remove HBW range that doesn't belong.
3. Add entire gap + DBG area, from end of TPC7 to end of entire
   DBG space.

Signed-off-by: Oded Gabbay

habanalabs: Fix spelling mistake "FEADBACK" -> "FEEDBACK"

2021-09-14T12:00:04+00:00

There is a spelling mistake in a literal string. Fix it.

Signed-off-by: Colin Ian King 
Reviewed-by: Oded Gabbay 
Signed-off-by: Oded Gabbay

habanalabs: fail collective wait when not supported

2021-09-14T12:00:04+00:00

As collective wait operation is required only when NIC ports are
available, we disable the option to submit a CS in case all the ports
are disabled, which is the current situation in the upstream driver.

Signed-off-by: Ofir Bitton 
Reviewed-by: Oded Gabbay 
Signed-off-by: Oded Gabbay

habanalabs/gaudi: use direct MSI in single mode

2021-09-14T12:00:03+00:00

Due to FLR scenario when running inside a VM, we must not use indirect
MSI because it might cause some issues on VM destroy.
In a VM we use single MSI mode in contrary to multi MSI mode which is
used in bare-metal.
Hence direct MSI should be used in single MSI mode only.

Signed-off-by: Omer Shpigelman 
Reviewed-by: Oded Gabbay 
Signed-off-by: Oded Gabbay

habanalabs: fix kernel OOPs related to staged cs

2021-09-14T12:00:03+00:00

In case of single staged cs with both first/last indications
set, we reach a scenario where in cs_release function flow
we don't cancel the TDR work before freeing the cs memory,
this lead to kernel OOPs since when the timer expires
the work pointer will be freed already.
In addition treat wait encaps cs "not found" handle
as "OK" for the user in order to keep the user interface
for both legacy and encpas signal/wait features the same.

Signed-off-by: farah kassabri 
Reviewed-by: Oded Gabbay 
Signed-off-by: Oded Gabbay

habanalabs: fix potential race in interrupt wait ioctl

2021-09-14T12:00:03+00:00

We have a potential race where a user interrupt can be received
in between user thread value comparison and before request was
added to wait list. This means that if no consecutive interrupt
will be received, user thread will timeout and fail.

The solution is to add the request to wait list before we
perform the comparison.

Signed-off-by: Ofir Bitton 
Reviewed-by: Oded Gabbay 
Signed-off-by: Oded Gabbay