[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>

5 files changed, 6 insertions, 6 deletions

diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index 8b41f9cc2560..9f2c887ffa04 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 6307428d2c94..2328128728be 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 a5dadc74cee6..24a330d82395 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 851b25d6e82b..9d8d63109a8f 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 16ce178f54d7..2e8c048b9b80 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);