[PATCH] mtd: spi-nor: mark desirable switch case fall through

[T***@microchip.com]

gcc 7 with -Wimplicit-fallthrough raises:

drivers/mtd/spi-nor/spi-nor.c: In function ‘set_4byte’:
drivers/mtd/spi-nor/spi-nor.c:289:13: warning: this statement may fall through [-Wimplicit-fallthrough=]
need_wren = true;
~~~~~~~~~~^~~~~~
drivers/mtd/spi-nor/spi-nor.c:290:2: note: here
case SNOR_MFR_MACRONIX:
^~~~

Quiet the warning by marking the expected switch fall through.

Signed-off-by: Tudor Ambarus <***@microchip.com>
---
drivers/mtd/spi-nor/spi-nor.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 9407ca5f9443..8065d5d76be5 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -287,6 +287,7 @@ static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
case SNOR_MFR_MICRON:
/* Some Micron need WREN command; all will accept it */
need_wren = true;
+ /* fall through */
case SNOR_MFR_MACRONIX:
case SNOR_MFR_WINBOND:
if (need_wren)
--
2.9.4

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