Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8336793baf962163c9fab5a3f39614295fdbab27
Commit:     8336793baf962163c9fab5a3f39614295fdbab27
Parent:     b3448b0bde5f1a858397fe791f76632e978a1dc8
Author:     Denys Vlasenko <[EMAIL PROTECTED]>
AuthorDate: Sun Sep 30 17:56:49 2007 -0700
Committer:  David S. Miller <[EMAIL PROTECTED]>
CommitDate: Wed Oct 10 16:53:57 2007 -0700

    [ZLIB]: Move bnx2 driver gzip unpacker into zlib.
    
    Signed-off-by: Denys Vlasenko <[EMAIL PROTECTED]>
    Acked-by: Michael Chan <[EMAIL PROTECTED]>
    Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
 drivers/net/bnx2.c              |   48 ++-------------------------------
 include/linux/zlib.h            |    6 +++-
 lib/zlib_inflate/inffast.c      |   18 ++++++------
 lib/zlib_inflate/inflate.c      |   55 ++++++++++++++++++++++++++++++++++++---
 lib/zlib_inflate/inflate_syms.c |    1 +
 5 files changed, 69 insertions(+), 59 deletions(-)

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 73d4a57..6d6ea56 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -2761,48 +2761,6 @@ bnx2_set_rx_mode(struct net_device *dev)
        spin_unlock_bh(&bp->phy_lock);
 }
 
-/* To be moved to generic lib/ */
-static int
-bnx2_gunzip(void *gunzip_buf, unsigned sz, u8 *zbuf, int len)
-{
-       struct z_stream_s *strm;
-       int rc;
-
-       /* gzip header (1f,8b,08... 10 bytes total + possible asciz filename)
-        * is stripped */
-
-       rc = -ENOMEM;
-       strm = kmalloc(sizeof(*strm), GFP_KERNEL);
-       if (strm == NULL)
-               goto gunzip_nomem2;
-       strm->workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
-       if (strm->workspace == NULL)
-               goto gunzip_nomem3;
-
-       strm->next_in = zbuf;
-       strm->avail_in = len;
-       strm->next_out = gunzip_buf;
-       strm->avail_out = sz;
-
-       rc = zlib_inflateInit2(strm, -MAX_WBITS);
-       if (rc == Z_OK) {
-               rc = zlib_inflate(strm, Z_FINISH);
-               /* after Z_FINISH, only Z_STREAM_END is "we unpacked it all" */
-               if (rc == Z_STREAM_END)
-                       rc = sz - strm->avail_out;
-               else
-                       rc = -EINVAL;
-               zlib_inflateEnd(strm);
-       } else
-               rc = -EINVAL;
-
-       kfree(strm->workspace);
-gunzip_nomem3:
-       kfree(strm);
-gunzip_nomem2:
-       return rc;
-}
-
 static void
 load_rv2p_fw(struct bnx2 *bp, u32 *rv2p_code, u32 rv2p_code_len,
        u32 rv2p_proc)
@@ -2858,7 +2816,7 @@ load_cpu_fw(struct bnx2 *bp, struct cpu_reg *cpu_reg, 
struct fw_info *fw)
                text = vmalloc(FW_BUF_SIZE);
                if (!text)
                        return -ENOMEM;
-               rc = bnx2_gunzip(text, FW_BUF_SIZE, fw->gz_text, 
fw->gz_text_len);
+               rc = zlib_inflate_blob(text, FW_BUF_SIZE, fw->gz_text, 
fw->gz_text_len);
                if (rc < 0) {
                        vfree(text);
                        return rc;
@@ -2935,14 +2893,14 @@ bnx2_init_cpus(struct bnx2 *bp)
        text = vmalloc(FW_BUF_SIZE);
        if (!text)
                return -ENOMEM;
-       rc = bnx2_gunzip(text, FW_BUF_SIZE, bnx2_rv2p_proc1, 
sizeof(bnx2_rv2p_proc1));
+       rc = zlib_inflate_blob(text, FW_BUF_SIZE, bnx2_rv2p_proc1, 
sizeof(bnx2_rv2p_proc1));
        if (rc < 0) {
                vfree(text);
                goto init_cpu_err;
        }
        load_rv2p_fw(bp, text, rc /* == len */, RV2P_PROC1);
 
-       rc = bnx2_gunzip(text, FW_BUF_SIZE, bnx2_rv2p_proc2, 
sizeof(bnx2_rv2p_proc2));
+       rc = zlib_inflate_blob(text, FW_BUF_SIZE, bnx2_rv2p_proc2, 
sizeof(bnx2_rv2p_proc2));
        if (rc < 0) {
                vfree(text);
                goto init_cpu_err;
diff --git a/include/linux/zlib.h b/include/linux/zlib.h
index 9e3192a..40c49cb 100644
--- a/include/linux/zlib.h
+++ b/include/linux/zlib.h
@@ -82,7 +82,7 @@
 struct internal_state;
 
 typedef struct z_stream_s {
-    Byte    *next_in;   /* next input byte */
+    const Byte *next_in;   /* next input byte */
     uInt     avail_in;  /* number of bytes available at next_in */
     uLong    total_in;  /* total nb of input bytes read so far */
 
@@ -699,4 +699,8 @@ extern int zlib_inflateInit2(z_streamp strm, int  
windowBits);
     struct internal_state {int dummy;}; /* hack for buggy compilers */
 #endif
 
+/* Utility function: initialize zlib, unpack binary blob, clean up zlib,
+ * return len or negative error code. */
+extern int zlib_inflate_blob(void *dst, unsigned dst_sz, const void *src, 
unsigned src_sz);
+
 #endif /* _ZLIB_H */
diff --git a/lib/zlib_inflate/inffast.c b/lib/zlib_inflate/inffast.c
index d84560c..8550b0c 100644
--- a/lib/zlib_inflate/inffast.c
+++ b/lib/zlib_inflate/inffast.c
@@ -69,22 +69,22 @@
 void inflate_fast(z_streamp strm, unsigned start)
 {
     struct inflate_state *state;
-    unsigned char *in;      /* local strm->next_in */
-    unsigned char *last;    /* while in < last, enough input available */
-    unsigned char *out;     /* local strm->next_out */
-    unsigned char *beg;     /* inflate()'s initial strm->next_out */
-    unsigned char *end;     /* while out < end, enough space available */
+    const unsigned char *in;    /* local strm->next_in */
+    const unsigned char *last;  /* while in < last, enough input available */
+    unsigned char *out;         /* local strm->next_out */
+    unsigned char *beg;         /* inflate()'s initial strm->next_out */
+    unsigned char *end;         /* while out < end, enough space available */
 #ifdef INFLATE_STRICT
     unsigned dmax;              /* maximum distance from zlib header */
 #endif
     unsigned wsize;             /* window size or zero if not using window */
     unsigned whave;             /* valid bytes in the window */
     unsigned write;             /* window write index */
-    unsigned char *window;  /* allocated sliding window, if wsize != 0 */
+    unsigned char *window;      /* allocated sliding window, if wsize != 0 */
     unsigned long hold;         /* local strm->hold */
     unsigned bits;              /* local strm->bits */
-    code const *lcode;      /* local strm->lencode */
-    code const *dcode;      /* local strm->distcode */
+    code const *lcode;          /* local strm->lencode */
+    code const *dcode;          /* local strm->distcode */
     unsigned lmask;             /* mask for first level of length codes */
     unsigned dmask;             /* mask for first level of distance codes */
     code this;                  /* retrieved table entry */
@@ -92,7 +92,7 @@ void inflate_fast(z_streamp strm, unsigned start)
                                 /*  window position, window bytes to copy */
     unsigned len;               /* match length, unused bytes */
     unsigned dist;              /* match distance */
-    unsigned char *from;    /* where to copy match from */
+    unsigned char *from;        /* where to copy match from */
 
     /* copy state to local variables */
     state = (struct inflate_state *)strm->state;
diff --git a/lib/zlib_inflate/inflate.c b/lib/zlib_inflate/inflate.c
index 7e1e311..0ad1ebf 100644
--- a/lib/zlib_inflate/inflate.c
+++ b/lib/zlib_inflate/inflate.c
@@ -332,14 +332,14 @@ static int zlib_inflateSyncPacket(z_streamp strm)
 int zlib_inflate(z_streamp strm, int flush)
 {
     struct inflate_state *state;
-    unsigned char *next;    /* next input */
-    unsigned char *put;     /* next output */
+    const unsigned char *next;  /* next input */
+    unsigned char *put;         /* next output */
     unsigned have, left;        /* available input and output */
     unsigned long hold;         /* bit buffer */
     unsigned bits;              /* bits in bit buffer */
     unsigned in, out;           /* save starting available input and output */
     unsigned copy;              /* number of stored or match bytes to copy */
-    unsigned char *from;    /* where to copy match bytes from */
+    unsigned char *from;        /* where to copy match bytes from */
     code this;                  /* current decoding table entry */
     code last;                  /* parent table entry */
     unsigned len;               /* length to copy for repeats, bits to drop */
@@ -897,7 +897,7 @@ int zlib_inflateIncomp(z_stream *z)
 
     /* Setup some variables to allow misuse of updateWindow */
     z->avail_out = 0;
-    z->next_out = z->next_in + z->avail_in;
+    z->next_out = (unsigned char*)z->next_in + z->avail_in;
 
     zlib_updatewindow(z, z->avail_in);
 
@@ -916,3 +916,50 @@ int zlib_inflateIncomp(z_stream *z)
 
     return Z_OK;
 }
+
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+/* Utility function: initialize zlib, unpack binary blob, clean up zlib,
+ * return len or negative error code. */
+int zlib_inflate_blob(void *gunzip_buf, unsigned sz, const void *buf, unsigned 
len)
+{
+       const u8 *zbuf = buf;
+       struct z_stream_s *strm;
+       int rc;
+
+       rc = -ENOMEM;
+       strm = kmalloc(sizeof(*strm), GFP_KERNEL);
+       if (strm == NULL)
+               goto gunzip_nomem1;
+       strm->workspace = kmalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
+       if (strm->workspace == NULL)
+               goto gunzip_nomem2;
+
+       /* gzip header (1f,8b,08... 10 bytes total + possible asciz filename)
+        * expected to be stripped from input */
+
+       strm->next_in = zbuf;
+       strm->avail_in = len;
+       strm->next_out = gunzip_buf;
+       strm->avail_out = sz;
+
+       rc = zlib_inflateInit2(strm, -MAX_WBITS);
+       if (rc == Z_OK) {
+               rc = zlib_inflate(strm, Z_FINISH);
+               /* after Z_FINISH, only Z_STREAM_END is "we unpacked it all" */
+               if (rc == Z_STREAM_END)
+                       rc = sz - strm->avail_out;
+               else
+                       rc = -EINVAL;
+               zlib_inflateEnd(strm);
+       } else
+               rc = -EINVAL;
+
+       kfree(strm->workspace);
+gunzip_nomem2:
+       kfree(strm);
+gunzip_nomem1:
+       return rc; /* returns Z_OK (0) if successful */
+}
diff --git a/lib/zlib_inflate/inflate_syms.c b/lib/zlib_inflate/inflate_syms.c
index 2061d4f..67329fe 100644
--- a/lib/zlib_inflate/inflate_syms.c
+++ b/lib/zlib_inflate/inflate_syms.c
@@ -16,4 +16,5 @@ EXPORT_SYMBOL(zlib_inflateInit2);
 EXPORT_SYMBOL(zlib_inflateEnd);
 EXPORT_SYMBOL(zlib_inflateReset);
 EXPORT_SYMBOL(zlib_inflateIncomp); 
+EXPORT_SYMBOL(zlib_inflate_blob);
 MODULE_LICENSE("GPL");
-
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