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[PATCH] SPI: spi bounce buffer has a minimum length

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Make sure that spi_write_then_read() can always handle at least 32 bytes
of transfer (total, both directions), minimizing one portability issue.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell 2006-04-02 10:37:40 -08:00 committed by Greg Kroah-Hartman
parent 747d844ee9
commit a9948b6194
1 changed files with 2 additions and 1 deletions
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3
drivers/spi/spi.c
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@ -522,7 +522,8 @@ int spi_sync(struct spi_device *spi, struct spi_message *message)
}
EXPORT_SYMBOL_GPL(spi_sync);
#define SPI_BUFSIZ (SMP_CACHE_BYTES)
/* portable code must never pass more than 32 bytes */
#define SPI_BUFSIZ max(32,SMP_CACHE_BYTES)
static u8 *buf;