[PATCH v1 4/5] mtd: m25p80: Check if the spi flash device has pm support

[Kamal Dasu <kdasu.kdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Call the spi_nor_rescan() only if the controller driver needs this
support. This way SoCs that need this feature can use it.

Signed-off-by: Kamal Dasu <kdasu.kdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/mtd/devices/m25p80.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 4528e33..ffdec60 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -328,8 +328,13 @@ static int m25p_suspend(struct device *dev)
 static int m25p_resume(struct device *dev)
 {
 	struct m25p *flash = dev_get_drvdata(dev);
+	struct spi_device *spi = flash->spi;
+	int ret = 0;
+
+	if (spi_flash_pm_supported(spi))
+		ret = spi_nor_pm_rescan(&flash->spi_nor, NULL);
 
-	return spi_nor_pm_rescan(&flash->spi-nor, NULL);
+	return ret;
 }
 #endif
 static SIMPLE_DEV_PM_OPS(m25p_pm_ops, m25p_suspend, m25p_resume);
-- 
1.9.1

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