Revert "[MTD] m25p80.c code cleanup"

This reverts commit 75d0ee2202b5740e94e913d8a52f91c6557c4c81.

Although it seems ObviouslyCorrect™, the spi_write() call uses DMA,
while spi_write_then_read() does not. Since our buffer is on the stack,
we must use the latter even though we don't actually want to read
anything back.

Pointed out by David Brownell <david-b@pacbell.net>

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 697a3a217837df166585ce1c7a6e9fb69a3655e4..76a76751da3660ce63123844d97eca891d2cbab2 100644 (file)
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -134,7 +134,7 @@ static inline int write_enable(struct m25p *flash)
 {
        u8      code = OPCODE_WREN;
 
-       return spi_write(flash->spi, &code, 1);
+       return spi_write_then_read(flash->spi, &code, 1, NULL, 0);
 }