[PATCH] USB: don't allocate dma pools for PIO HCDs

USB: don't allocate dma pools for PIO HCDs

hcd_buffer_alloc() and hcd_buffer_free() have a similar dma_mask
check and revert to kmalloc()/kfree(), but hcd_buffer_create()
doesn't check dma_mask and allocates unused dma pools.

Signed-off-by: Chris Humbert <mahadri-kernel@drigon.com>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/usb/core/buffer.c b/drivers/usb/core/buffer.c
index 419c9943a7cb..ad742cec94fa 100644
--- a/drivers/usb/core/buffer.c
+++ b/drivers/usb/core/buffer.c
@@ -55,6 +55,9 @@ int hcd_buffer_create (struct usb_hcd *hcd)
         char            name [16];
         int             i, size;
 
+        if (!hcd->self.controller->dma_mask)
+                return 0;
+
         for (i = 0; i < HCD_BUFFER_POOLS; i++) { 
                 if (!(size = pool_max [i]))
                         continue;