crypto: nx - fix nx-842 pSeries driver minimum buffer size

Reduce the nx-842 pSeries driver minimum buffer size from 128 to 8. Also replace the single use of IO_BUFFER_ALIGN macro with the standard and correct DDE_BUFFER_ALIGN. The hw sometimes rejects buffers that contain padding past the end of the 8-byte aligned section where it sees the "end" marker. With the minimum buffer size set too high, some highly compressed buffers were being padded and the hw was incorrectly rejecting them; this sets the minimum correctly so there will be no incorrect padding. Signed-off-by: Dan Streetman <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
sfionov · Jun 4, 2015 · 3154de7 · 3154de7
1 parent b08b6b7
commit 3154de7
Showing 1 changed file with 2 additions and 5 deletions.
diff --git a/drivers/crypto/nx/nx-842-pseries.c b/drivers/crypto/nx/nx-842-pseries.c
@@ -30,13 +30,10 @@ MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Robert Jennings <[email protected]>");
 MODULE_DESCRIPTION("842 H/W Compression driver for IBM Power processors");
 
-/* IO buffer must be 128 byte aligned */
-#define IO_BUFFER_ALIGN 128
-
 static struct nx842_constraints nx842_pseries_constraints = {
-	.alignment =	IO_BUFFER_ALIGN,
+	.alignment =	DDE_BUFFER_ALIGN,
 	.multiple =	DDE_BUFFER_LAST_MULT,
-	.minimum =	IO_BUFFER_ALIGN,
+	.minimum =	DDE_BUFFER_LAST_MULT,
 	.maximum =	PAGE_SIZE, /* dynamic, max_sync_size */
 };