public inbox for u-boot@lists.denx.de
 help / color / mirror / Atom feed
From: Timo Herbrecher <t.herbrecher@gateware.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] mxc_spi: bugfix for double incrementing read pointer on unaligned buffers in spi_xchg_single
Date: Wed, 14 Aug 2013 10:06:05 +0200	[thread overview]
Message-ID: <520B3A6D.1010100@gateware.de> (raw)

If dout buffer is not 32 bit-aligned or data to transmit is not multiple
of 32 bit the read data pointer is already incremented on single byte reads.

Signed-off-by: Timo Herbrecher <t.herbrecher@gateware.de>
---
 drivers/spi/mxc_spi.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/spi/mxc_spi.c b/drivers/spi/mxc_spi.c
index fd72a65..95dd03f 100644
--- a/drivers/spi/mxc_spi.c
+++ b/drivers/spi/mxc_spi.c
@@ -255,8 +255,8 @@ int spi_xchg_single(struct spi_slave *slave,
unsigned int bitlen,
                        } else {
                                data = *(u32 *)dout;
                                data = cpu_to_be32(data);
+                               dout += 4;
                        }
-                       dout += 4;
                }
                debug("Sending SPI 0x%x\n", data);
                reg_write(&regs->txdata, data);
-- 
1.7.0.4

                 reply	other threads:[~2013-08-14  8:06 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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=520B3A6D.1010100@gateware.de \
    --to=t.herbrecher@gateware.de \
    --cc=u-boot@lists.denx.de \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox