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usb: dwc2: fix possible alignment issues

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Since upgrading to gcc9, warnings are issued:
"taking address of packed member of ‘...’ may result in an unaligned
pointer value"

Fix this by converting dwc2_fifo_read to use unaligned access since packed
structures may be on an unaligned address, depending on USB hardware.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
This commit is contained in:
Simon Goldschmidt 2019-11-21 22:15:23 +01:00 committed by Marek Vasut
parent 616ebd8b9c
commit 7dc0ac6015
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
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@ -731,7 +731,7 @@ static int write_fifo_ep0(struct dwc2_ep *ep, struct dwc2_request *req)
return 0;
}
static int dwc2_fifo_read(struct dwc2_ep *ep, u32 *cp, int max)
static int dwc2_fifo_read(struct dwc2_ep *ep, void *cp, int max)
{
invalidate_dcache_range((unsigned long)cp, (unsigned long)cp +
ROUND(max, CONFIG_SYS_CACHELINE_SIZE));
@ -1285,7 +1285,7 @@ static void dwc2_ep0_setup(struct dwc2_udc *dev)
nuke(ep, -EPROTO);
/* read control req from fifo (8 bytes) */
dwc2_fifo_read(ep, (u32 *)usb_ctrl, 8);
dwc2_fifo_read(ep, usb_ctrl, 8);
debug_cond(DEBUG_SETUP != 0,
"%s: bRequestType = 0x%x(%s), bRequest = 0x%x"