From 0ffa0285052607513a29f529ddb5061c907fd8a6 Mon Sep 17 00:00:00 2001
From: Hans-Peter Nilsson <hans-peter.nilsson@axis.com>
Date: Mon, 12 Feb 2007 00:52:45 -0800
Subject: [PATCH] [PATCH] SPI cleanup() method param becomes non-const
I'd like to assign NULL to kfree()d members of a structure. I can't do
that without ugly casting (see the PXA patch) when the structure pointed to
is const-qualified. I don't really see a reason why the cleanup method
isn't allowed to alter the object it should clean up. :-)
No, I didn't test the PXA patch, but I verified that the NULL-assignment
doesn't stop me from doing rmmod/insmodding my own spi_bitbang-based
driver.
Signed-off-by: Hans-Peter Nilsson <hp@axis.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/spi/pxa2xx_spi.c | 4 ++--
drivers/spi/spi.c | 2 +-
drivers/spi/spi_bitbang.c | 2 +-
include/linux/spi/spi.h | 2 +-
include/linux/spi/spi_bitbang.h | 2 +-
5 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index 8b41f9cc2560f..9f2c887ffa046 100644
--- a/drivers/spi/pxa2xx_spi.c
+++ b/drivers/spi/pxa2xx_spi.c
@@ -1214,9 +1214,9 @@ static int setup(struct spi_device *spi)
return 0;
}
-static void cleanup(const struct spi_device *spi)
+static void cleanup(struct spi_device *spi)
{
- struct chip_data *chip = spi_get_ctldata((struct spi_device *)spi);
+ struct chip_data *chip = spi_get_ctldata(spi);
kfree(chip);
}
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 6307428d2c940..2328128728be6 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -32,7 +32,7 @@
*/
static void spidev_release(struct device *dev)
{
- const struct spi_device *spi = to_spi_device(dev);
+ struct spi_device *spi = to_spi_device(dev);
/* spi masters may cleanup for released devices */
if (spi->master->cleanup)
diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c
index a5dadc74cee6c..24a330d82395a 100644
--- a/drivers/spi/spi_bitbang.c
+++ b/drivers/spi/spi_bitbang.c
@@ -238,7 +238,7 @@ EXPORT_SYMBOL_GPL(spi_bitbang_setup);
/**
* spi_bitbang_cleanup - default cleanup for per-word I/O loops
*/
-void spi_bitbang_cleanup(const struct spi_device *spi)
+void spi_bitbang_cleanup(struct spi_device *spi)
{
kfree(spi->controller_state);
}
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 851b25d6e82bb..9d8d63109a8f2 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -220,7 +220,7 @@ struct spi_master {
struct spi_message *mesg);
/* called on release() to free memory provided by spi_master */
- void (*cleanup)(const struct spi_device *spi);
+ void (*cleanup)(struct spi_device *spi);
};
static inline void *spi_master_get_devdata(struct spi_master *master)
diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h
index 16ce178f54d7a..2e8c048b9b80f 100644
--- a/include/linux/spi/spi_bitbang.h
+++ b/include/linux/spi/spi_bitbang.h
@@ -55,7 +55,7 @@ struct spi_bitbang {
* methods, if you like.
*/
extern int spi_bitbang_setup(struct spi_device *spi);
-extern void spi_bitbang_cleanup(const struct spi_device *spi);
+extern void spi_bitbang_cleanup(struct spi_device *spi);
extern int spi_bitbang_transfer(struct spi_device *spi, struct spi_message *m);
extern int spi_bitbang_setup_transfer(struct spi_device *spi,
struct spi_transfer *t);
--
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