All of lore.kernel.org
 help / color / mirror / Atom feed
From: Michael Grzeschik <m.grzeschik@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH] atmel_spi: add mesg->actual_length, so devices can use it for read/write
Date: Thu, 24 Nov 2011 15:32:39 +0100	[thread overview]
Message-ID: <20111124143239.GA32286@pengutronix.de> (raw)

Without this i.e. the m25p driver is not working properly.

Its used to calculate the return value of the read/write function of
some devices. If the value is missing, barebox would always
miscalculate the next transfer sizes.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
---
 drivers/spi/atmel_spi.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
index faa03b1..47e6756 100644
--- a/drivers/spi/atmel_spi.c
+++ b/drivers/spi/atmel_spi.c
@@ -190,6 +190,7 @@ static int atmel_spi_transfer(struct spi_device *spi, struct spi_message *mesg)
 	struct spi_transfer *t		= NULL;
 	unsigned int bits		= spi->bits_per_word;
 
+	mesg->actual_length = 0;
 	ret = master->setup(spi);
 	if (ret < 0) {
 		dev_dbg(master->dev, "transfer: master setup failed\n");
@@ -210,6 +211,7 @@ static int atmel_spi_transfer(struct spi_device *spi, struct spi_message *mesg)
 		u32 tx_val;
 		int i = 0, rx_val;
 
+		mesg->actual_length += t->len;
 		if (bits <= 8) {
 			const u8 *txbuf = t->tx_buf;
 			u8 *rxbuf = t->rx_buf;
-- 
1.7.7.1


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

             reply	other threads:[~2011-11-24 14:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-24 14:32 Michael Grzeschik [this message]
2011-11-25 15:11 ` [PATCH] atmel_spi: add mesg->actual_length, so devices can use it for read/write Hubert Feurstein
2012-01-01  4:46 ` Jean-Christophe PLAGNIOL-VILLARD
2012-01-02 10:42   ` Michael Grzeschik

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20111124143239.GA32286@pengutronix.de \
    --to=m.grzeschik@pengutronix.de \
    --cc=barebox@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.