[PATCH] Sync up ieee-1394

Lots of this patch is trivial code cleanups (static vars were being
intialized to 0, etc).

There's also some fixes for ISO transmits (max buffer handling).
Aswell, we have a few fixes to disable IRM capabilites correctly.  We've
also disabled, by default some generally unused EXPORT symbols for the
sake of cleanliness in the kernel.  However, instead of removing them
completely, we felt it necessary to have a config option that allowed
them to be enabled for the many projects outside of the main kernel tree
that use our API for driver development.

The primary reason for this patch is to revert a MODE6->MODE10 RBC
conversion patch from the SCSI maintainers.  The new conversions handled
directly in the scsi layer do not seem to work for SBP2.  This patch
reverts to our old working code so that users can enjoy using Firewire
disks and dvd drives again.

We are working with the SCSI maintainers to resolve this issue outside
of the main kernel tree.  We'll merge the patch once the SCSI layer's
handling of the MODE10 conversion is working for us.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 27 insertions, 10 deletions

diff --git a/drivers/ieee1394/csr1212.c b/drivers/ieee1394/csr1212.c
index 7c4330e2e87..61ddd5d37ef 100644
--- a/drivers/ieee1394/csr1212.c
+++ b/drivers/ieee1394/csr1212.c
@@ -209,7 +209,15 @@ void csr1212_init_local_csr(struct csr1212_csr *csr,
 {
 	static const int mr_map[] = { 4, 64, 1024, 0 };
 
+#ifdef __KERNEL__
+	BUG_ON(max_rom & ~0x3);
 	csr->max_rom = mr_map[max_rom];
+#else
+	if (max_rom & ~0x3) /* caller supplied invalid argument */
+		csr->max_rom = 0;
+	else
+		csr->max_rom = mr_map[max_rom];
+#endif
 	memcpy(csr->bus_info_data, bus_info_data, csr->bus_info_len);
 }
 
@@ -533,12 +541,15 @@ struct csr1212_keyval *csr1212_new_icon_descriptor_leaf(u_int32_t version,
 	static const int pd[4] = { 0, 4, 16, 256 };
 	static const int cs[16] = { 4, 2 };
 	struct csr1212_keyval *kv;
-	int palette_size = pd[palette_depth] * cs[color_space];
+	int palette_size;
 	int pixel_size = (hscan * vscan + 3) & ~0x3;
 
-	if ((palette_depth && !palette) || !pixels)
+	if (!pixels || (!palette && palette_depth) ||
+	    (palette_depth & ~0x3) || (color_space & ~0xf))
 		return NULL;
 
+	palette_size = pd[palette_depth] * cs[color_space];
+
 	kv = csr1212_new_descriptor_leaf(1, 0, NULL,
 					 palette_size + pixel_size +
 					 CSR1212_ICON_DESCRIPTOR_LEAF_OVERHEAD);
@@ -760,9 +771,9 @@ static int csr1212_append_new_cache(struct csr1212_csr *csr, size_t romsize)
 	struct csr1212_csr_rom_cache *cache;
 	u_int64_t csr_addr;
 
-	if (!csr || !csr->ops->allocate_addr_range ||
-	    !csr->ops->release_addr)
-		return CSR1212_ENOMEM;
+	if (!csr || !csr->ops || !csr->ops->allocate_addr_range ||
+	    !csr->ops->release_addr || csr->max_rom < 1)
+		return CSR1212_EINVAL;
 
 	/* ROM size must be a multiple of csr->max_rom */
 	romsize = (romsize + (csr->max_rom - 1)) & ~(csr->max_rom - 1);
@@ -1145,6 +1156,8 @@ int csr1212_generate_csr_image(struct csr1212_csr *csr)
 
 			/* Make sure the Extended ROM leaf is a multiple of
 			 * max_rom in size. */
+			if (csr->max_rom < 1)
+				return CSR1212_EINVAL;
 			leaf_size = (cache->len + (csr->max_rom - 1)) &
 				~(csr->max_rom - 1);
 
@@ -1409,7 +1422,7 @@ int _csr1212_read_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv)
 	u_int32_t *cache_ptr;
 	u_int16_t kv_len = 0;
 
-	if (!csr || !kv)
+	if (!csr || !kv || csr->max_rom < 1)
 		return CSR1212_EINVAL;
 
 	/* First find which cache the data should be in (or go in if not read
@@ -1572,7 +1585,7 @@ int csr1212_parse_csr(struct csr1212_csr *csr)
 	struct csr1212_dentry *dentry;
 	int ret;
 
-	if (!csr || !csr->ops->bus_read)
+	if (!csr || !csr->ops || !csr->ops->bus_read)
 		return CSR1212_EINVAL;
 
 	ret = csr1212_parse_bus_info_block(csr);
@@ -1581,9 +1594,13 @@ int csr1212_parse_csr(struct csr1212_csr *csr)
 
 	if (!csr->ops->get_max_rom)
 		csr->max_rom = mr_map[0];	/* default value */
-	else
-		csr->max_rom = mr_map[csr->ops->get_max_rom(csr->bus_info_data,
-							    csr->private)];
+	else {
+		int i = csr->ops->get_max_rom(csr->bus_info_data,
+					      csr->private);
+		if (i & ~0x3)
+			return CSR1212_EINVAL;
+		csr->max_rom = mr_map[i];
+	}
 
 	csr->cache_head->layout_head = csr->root_kv;
 	csr->cache_head->layout_tail = csr->root_kv;