From: David Brownell <david-b@pacbell.net>
Date: Sat, 30 Dec 2006 00:48:47 +0000 (-0800)
Subject: [PATCH] SPI/MTD: mtd_dataflash oops prevention
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=de4fa99266b2e1f6771644b9b50f33fe8f82d728;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] SPI/MTD: mtd_dataflash oops prevention

Return a fault code if the Dataflash driver runs into a "no device present"
error when the MISO line has a pulldown (it currently expects a pullup), so
that rmmod won't oops.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c
index 0a7e86859bf1..910e4061dfd2 100644
--- a/drivers/mtd/devices/mtd_dataflash.c
+++ b/drivers/mtd/devices/mtd_dataflash.c
@@ -536,7 +536,7 @@ static int __devinit dataflash_probe(struct spi_device *spi)
 	if (status <= 0 || status == 0xff) {
 		DEBUG(MTD_DEBUG_LEVEL1, "%s: status error %d\n",
 				spi->dev.bus_id, status);
-		if (status == 0xff)
+		if (status == 0 || status == 0xff)
 			status = -ENODEV;
 		return status;
 	}