diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2011-02-08 12:46:14 +0300 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-02-16 01:05:58 +0300 |
| commit | ea3065df7ddffe4669136619ad712783ccee22c6 (patch) | |
| tree | d88eeca492e5de057d3011807715c5d020fba2ba /drivers/spi/spi_bitbang.c | |
| parent | 1974eba605557e934764cb83c8ceb0eca78f011a (diff) | |
| download | linux-ea3065df7ddffe4669136619ad712783ccee22c6.tar.xz | |
spi/bitbang: check for setup_transfer during initialization
setup_transfer is mandatory if spi_bitbang_transfer is used, so
check for it during initialization and not each time during runtime.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi/spi_bitbang.c')
| -rw-r--r-- | drivers/spi/spi_bitbang.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c index 8b55724d5f39..14a63f6010d1 100644 --- a/drivers/spi/spi_bitbang.c +++ b/drivers/spi/spi_bitbang.c @@ -259,10 +259,6 @@ static void bitbang_work(struct work_struct *work) struct spi_bitbang *bitbang = container_of(work, struct spi_bitbang, work); unsigned long flags; - int (*setup_transfer)(struct spi_device *, - struct spi_transfer *); - - setup_transfer = bitbang->setup_transfer; spin_lock_irqsave(&bitbang->lock, flags); bitbang->busy = 1; @@ -300,11 +296,7 @@ static void bitbang_work(struct work_struct *work) /* init (-1) or override (1) transfer params */ if (do_setup != 0) { - if (!setup_transfer) { - status = -ENOPROTOOPT; - break; - } - status = setup_transfer(spi, t); + status = bitbang->setup_transfer(spi, t); if (status < 0) break; if (do_setup == -1) @@ -465,6 +457,9 @@ int spi_bitbang_start(struct spi_bitbang *bitbang) } } else if (!bitbang->master->setup) return -EINVAL; + if (bitbang->master->transfer == spi_bitbang_transfer && + !bitbang->setup_transfer) + return -EINVAL; /* this task is the only thing to touch the SPI bits */ bitbang->busy = 0; |