spi: Deal with slaves that return from transfer_one() unfinished

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Some drivers, such as spi-pxa2xx return from the transfer_one callback
immediately, idicating that the transfer will be finished asynchronously.

Normally, spi_transfer_one_message() synchronously waits for the
transfer to finish with wait_for_completion_timeout(). For slaves, we
don't want the transaction to time out as it can complete in a long time
in future. Use wait_for_completion_interruptible() instead.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Lubomir Rintel 2018-11-13 11:22:24 +01:00 • committed by Mark Brown

parent aa66478aa5

commit 810923f3bf

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1 changed files with 39 additions and 23 deletions

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drivers/spi/spi.c

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