[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>

3 files changed, 4 insertions, 4 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);
 }