From 9c790a748f6b61e36f7aaf0c8d5ed35c9b09f454 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Thu, 30 Aug 2012 13:39:38 +0000 Subject: mtd: nand: allow NAND_NO_SUBPAGE_WRITE to be set from driver This is based on Linux kernel -next: commit 14f44abf1dafc20ba42ce8616a8fc8fbd1b3712b Author: Brian Norris Date: Fri Jul 13 09:28:24 2012 -0700 mtd: nand: allow NAND_NO_SUBPAGE_WRITE to be set from driver The NAND_CHIPOPTIONS_MSK has limited utility and is causing real bugs. It silently masks off at least one flag that might be set by the driver (NAND_NO_SUBPAGE_WRITE). This breaks the GPMI NAND driver and possibly others. Really, as long as driver writers exercise a small amount of care with NAND_* options, this mask is not necessary at all; it was only here to prevent certain options from accidentally being set by the driver. But the original thought turns out to be a bad idea occasionally. Thus, kill it. Note, this patch fixes some major gpmi-nand breakage. Signed-off-by: Marek Vasut Cc: Brian Norris Cc: Eric Nelson Cc: Fabio Estevam Cc: Otavio Salvador Cc: Scott Wood Signed-off-by: Scott Wood --- drivers/mtd/nand/nand_base.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 50bfb65..390ff90 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2579,9 +2579,7 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, if (le16_to_cpu(p->features) & 1) *busw = NAND_BUSWIDTH_16; - chip->options &= ~NAND_CHIPOPTIONS_MSK; - chip->options |= (NAND_NO_READRDY | - NAND_NO_AUTOINCR) & NAND_CHIPOPTIONS_MSK; + chip->options |= NAND_NO_READRDY | NAND_NO_AUTOINCR; return 1; } @@ -2753,8 +2751,7 @@ static const struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, } } /* Get chip options, preserve non chip based options */ - chip->options &= ~NAND_CHIPOPTIONS_MSK; - chip->options |= type->options & NAND_CHIPOPTIONS_MSK; + chip->options |= type->options; /* Check if chip is a not a samsung device. Do not clear the * options for chips which are not having an extended id. -- cgit v1.1