[PATCH] remove non-cleanroom pwc driver compression

The original pwc author raised some questions about the reverse
engineering of the decompressor algorithms used in the pwc driver.
Having done some detailed investigation it appears those concerns that
clean room policy was not followed are reasonable.  I've also had a
friendly discussion with Philips to ask their view on this.

This removes the problem items of code which reduces the pwc
functionality in the kernel a little but leaves all the framework for
setup that will be needed for decompressors in user space (where they
eventually belong).  This change set is designed to be the minimal risk
change set given that 2.6.12 is hopefully close to hand, with a view to
merging the much updated pwc code in 2.6.13 series kernels.

Someone else can then redo the decompressors properly (clean room) in
user space.

Note that while its easy to say that it should have been caught earlier,
but the violation was really only obvious to someone who had access to
both the proprietary source and the 'GPL' source.

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/usb/media/pwc/pwc-if.c b/drivers/usb/media/pwc/pwc-if.c
index cca47f4..5429ff3 100644
--- a/drivers/usb/media/pwc/pwc-if.c
+++ b/drivers/usb/media/pwc/pwc-if.c
@@ -68,8 +68,6 @@
 #include "pwc-ioctl.h"
 #include "pwc-kiara.h"
 #include "pwc-timon.h"
-#include "pwc-dec23.h"
-#include "pwc-dec1.h"
 #include "pwc-uncompress.h"
 
 /* Function prototypes and driver templates */
@@ -322,6 +320,7 @@ static int pwc_allocate_buffers(struct pwc_device *pdev)
 	  case 730:
 	  case 740:
 	  case 750:
+#if 0	  
 	    Trace(TRACE_MEMORY,"private_data(%zu)\n",sizeof(struct pwc_dec23_private));
 	    kbuf = kmalloc(sizeof(struct pwc_dec23_private), GFP_KERNEL);	/* Timon & Kiara */
 	    break;
@@ -330,6 +329,8 @@ static int pwc_allocate_buffers(struct pwc_device *pdev)
 	    /* TODO & FIXME */
 	    kbuf = kmalloc(sizeof(struct pwc_dec23_private), GFP_KERNEL);
 	    break;
+#endif	 
+	;
 	 }
 	if (kbuf == NULL) {
 	   Err("Failed to allocate decompress table.\n");
@@ -1131,11 +1132,11 @@ static int pwc_video_close(struct inode *inode, struct file *file)
 	  case 730:
 	  case 740:
 	  case 750:
-	    pwc_dec23_exit();	/* Timon & Kiara */
+/*	    pwc_dec23_exit();	*//* Timon & Kiara */
 	    break;
 	  case 645:
 	  case 646:
-	    pwc_dec1_exit();
+/*	    pwc_dec1_exit(); */
 	    break;
 	 }