lkml.org 
[lkml]   [2018]   [May]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 09/15] fsi/gpio: Include command build in locked section
Date
From: Jeremy Kerr <jk@ozlabs.org>

For implementing relative addressing mode, we'll need to build a command
that is coherent with CFAM state. To do that, include the
build_command_* functions in the locked section of read/write/term.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
drivers/fsi/fsi-master-gpio.c | 25 ++++++++++++++++++-------
1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/drivers/fsi/fsi-master-gpio.c b/drivers/fsi/fsi-master-gpio.c
index e1bde9e3f855..d50ea4849377 100644
--- a/drivers/fsi/fsi-master-gpio.c
+++ b/drivers/fsi/fsi-master-gpio.c
@@ -463,14 +463,10 @@ static int fsi_master_gpio_xfer(struct fsi_master_gpio *master, uint8_t slave,
{
int rc;

- mutex_lock(&master->cmd_lock);
-
rc = send_request(master, cmd);
if (!rc)
rc = poll_for_response(master, slave, resp_len, resp);

- mutex_unlock(&master->cmd_lock);
-
return rc;
}

@@ -479,12 +475,17 @@ static int fsi_master_gpio_read(struct fsi_master *_master, int link,
{
struct fsi_master_gpio *master = to_fsi_master_gpio(_master);
struct fsi_gpio_msg cmd;
+ int rc;

if (link != 0)
return -ENODEV;

+ mutex_lock(&master->cmd_lock);
build_abs_ar_command(&cmd, id, addr, size, NULL);
- return fsi_master_gpio_xfer(master, id, &cmd, size, val);
+ rc = fsi_master_gpio_xfer(master, id, &cmd, size, val);
+ mutex_unlock(&master->cmd_lock);
+
+ return rc;
}

static int fsi_master_gpio_write(struct fsi_master *_master, int link,
@@ -492,12 +493,17 @@ static int fsi_master_gpio_write(struct fsi_master *_master, int link,
{
struct fsi_master_gpio *master = to_fsi_master_gpio(_master);
struct fsi_gpio_msg cmd;
+ int rc;

if (link != 0)
return -ENODEV;

+ mutex_lock(&master->cmd_lock);
build_abs_ar_command(&cmd, id, addr, size, val);
- return fsi_master_gpio_xfer(master, id, &cmd, 0, NULL);
+ rc = fsi_master_gpio_xfer(master, id, &cmd, 0, NULL);
+ mutex_unlock(&master->cmd_lock);
+
+ return rc;
}

static int fsi_master_gpio_term(struct fsi_master *_master,
@@ -505,12 +511,17 @@ static int fsi_master_gpio_term(struct fsi_master *_master,
{
struct fsi_master_gpio *master = to_fsi_master_gpio(_master);
struct fsi_gpio_msg cmd;
+ int rc;

if (link != 0)
return -ENODEV;

+ mutex_lock(&master->cmd_lock);
build_term_command(&cmd, id);
- return fsi_master_gpio_xfer(master, id, &cmd, 0, NULL);
+ rc = fsi_master_gpio_xfer(master, id, &cmd, 0, NULL);
+ mutex_unlock(&master->cmd_lock);
+
+ return rc;
}

static int fsi_master_gpio_break(struct fsi_master *_master, int link)
--
2.17.0
\
 
 \ /
  Last update: 2018-05-29 03:50    [W:0.167 / U:0.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site