libertas_spi: Use workqueue in hw_host_to_card

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Use workqueue to perform SPI xfers, it's necessary to fix
nasty "BUG: scheduling while atomic", because
spu_write() calls spi_sync() and spi_sync() may sleep, but
hw_host_to_card() callback can be called from atomic context.
Remove kthread completely, workqueue now does its job.
Restore intermediate buffers which were removed in commit
86c34fe89e that introduced
mentioned bug.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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This commit is contained in:

Vasily Khoruzhick

2011-01-21 22:44:48 +02:00

committed by John W. Linville

parent dbd98308a5

commit 16f775befc

1 changed files with 257 additions and 147 deletions

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drivers/net/wireless/libertas/if_spi.c

+257 -147

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