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staging: vchiq: add message handling to TODO list

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Recently Arnd Bergmann noticed that the message handling looks broken
to him. So add this point on the TODO list.

Reviewed-by: Nicolas Saenz Julienne <nsaenz@kernel.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1642968143-19281-7-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stefan Wahren 2022-01-23 21:02:11 +01:00 committed by Greg Kroah-Hartman
parent fcaaed7ca3
commit fd0be0f9ae
1 changed files with 9 additions and 0 deletions
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9
drivers/staging/vc04_services/interface/TODO
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@ -62,3 +62,12 @@ number of devices probed.
* Clean up Sparse warnings from __user annotations. See
vchiq_irq_queue_bulk_tx_rx(). Ensure that the address of "&waiter->bulk_waiter"
is never disclosed to userspace.
* Fix behavior of message handling
The polling behavior of vchiq_bulk_transmit(), vchiq_bulk_receive() and
vchiq_queue_kernel_message() looks broken. A possible signal should be
propagated back to user space to let the calling task handle it before
retrying. Hopefully these msleep(1) shouldn't be necessary anymore.
https://lore.kernel.org/linux-staging/CAK8P3a3HGm1cPo4sW9fOY4E8AN8yAq3tevXxU5m8bmtmsU8WKw@mail.gmail.com/