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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 <swarren@nvidia.com>
utp
Stephen Warren 2014-02-06 13:13:06 -07:00 committed by Marek Vasut
parent 2456b97f0c
commit 8165e34bf4
1 changed files with 4 additions and 2 deletions
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6
drivers/usb/host/ehci-hcd.c
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@ -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;