[PATCH] spi: spi.c: Provide cast to avoid warning

[Fabio Estevam <festevam-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

From: Fabio Estevam <fabio.estevam-KZfg59tc24xl57MIdRCFDg@public.gmane.org>

commit b3a223ee2d (spi: Remove SPI_BUFSIZ restriction on spi_write_then_read())
introduced the following build warning:

drivers/spi/spi.c:1655:355: warning: comparison of distinct pointer types lacks a cast [enabled by default]

Provide the cast to avoid the warning.

Signed-off-by: Fabio Estevam <fabio.estevam-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
---
 drivers/spi/spi.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 224b7bc..78fcff0 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1652,7 +1652,8 @@ int spi_write_then_read(struct spi_device *spi,
 	 * using the pre-allocated buffer or the transfer is too large.
 	 */
 	if ((n_tx + n_rx) > SPI_BUFSIZ || !mutex_trylock(&lock)) {
-		local_buf = kmalloc(max(SPI_BUFSIZ, n_tx + n_rx), GFP_KERNEL);
+		local_buf = kmalloc(max((unsigned)SPI_BUFSIZ, n_tx + n_rx),
+								GFP_KERNEL);
 		if (!local_buf)
 			return -ENOMEM;
 	} else {
-- 
1.7.9.5


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