From 8165e34bf4f1b663ca37f7ead4bb029b4d9da74e Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Thu, 6 Feb 2014 13:13:06 -0700 Subject: [PATCH] usb: ehci: fully align interrupt QHs/QTDs These data structures are passed to cache-flushing routines, and hence must be conform to both the USB the cache-flusing alignment requirements. That means aligning to USB_DMA_MINALIGN. This is important on systems where cache lines are >32 bytes. Signed-off-by: Stephen Warren --- drivers/usb/host/ehci-hcd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 7068b762d8..6017090ebe 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1162,14 +1162,16 @@ create_int_queue(struct usb_device *dev, unsigned long pipe, int queuesize, debug("ehci intr queue: out of memory\n"); goto fail1; } - result->first = memalign(32, sizeof(struct QH) * queuesize); + result->first = memalign(USB_DMA_MINALIGN, + sizeof(struct QH) * queuesize); if (!result->first) { debug("ehci intr queue: out of memory\n"); goto fail2; } result->current = result->first; result->last = result->first + queuesize - 1; - result->tds = memalign(32, sizeof(struct qTD) * queuesize); + result->tds = memalign(USB_DMA_MINALIGN, + sizeof(struct qTD) * queuesize); if (!result->tds) { debug("ehci intr queue: out of memory\n"); goto fail3; -- 2.39.2