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From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 4/6] nor m25p80: align start and end to erase blocks
Date: Tue, 31 Jul 2012 19:59:14 +0200	[thread overview]
Message-ID: <1343757556-11897-5-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1343757556-11897-1-git-send-email-s.hauer@pengutronix.de>

The erase command normally makes sure that the selected area is erased,
therefore align the parameters to eraseblock boundaries.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/nor/m25p80.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/nor/m25p80.c b/drivers/nor/m25p80.c
index 0f3bcd1..7ff4546 100644
--- a/drivers/nor/m25p80.c
+++ b/drivers/nor/m25p80.c
@@ -205,8 +205,9 @@ static ssize_t m25p80_erase(struct cdev *cdev, size_t count, loff_t offset)
 	if (offset + count > flash->size)
 		return -EINVAL;
 
-	addr = offset;
-	len = count;
+	/* Align start and len to erase blocks */
+	addr = offset & ~(flash->erasesize - 1);
+	len = ALIGN(offset + count, flash->erasesize) - addr;
 
 	/* whole-chip erase? */
 	if (len == flash->size) {
-- 
1.7.10.4


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  parent reply	other threads:[~2012-07-31 17:59 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-31 17:59 [PATCH] m25p80 spi flash updates Sascha Hauer
2012-07-31 17:59 ` [PATCH 1/6] nor m25p80: remove progression bar Sascha Hauer
2012-07-31 17:59 ` [PATCH 2/6] nor m25p80: remove unused variables Sascha Hauer
2012-07-31 17:59 ` [PATCH 3/6] nor m25p80: refactor chip erase Sascha Hauer
2012-07-31 17:59 ` Sascha Hauer [this message]
2012-07-31 17:59 ` [PATCH 5/6] nor m25p80: optimize erase Sascha Hauer
2012-07-31 17:59 ` [PATCH 6/6] nor m25p80: implement fast read Sascha Hauer

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