Commit 49814e2c authored by Christophe JAILLET's avatar Christophe JAILLET Committed by Greg Kroah-Hartman
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usb: early: xhci-dbc: Use memcpy_and_pad() 



Instead of zeroing some memory and then copying data in part or all of it,
use memcpy_and_pad().
This avoids writing some memory twice and should save a few cycles.

Signed-off-by: default avatarChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/b447a7e9778d3f9e6997eb9494f1687dc2d5d3bf.1675016180.git.christophe.jaillet@wanadoo.fr


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e662c16f

drivers/usb/early/xhci-dbc.c

+1 −2
Original line number Diff line number Diff line
@@ -499,8 +499,7 @@ static int xdbc_bulk_transfer(void *data, int size, bool read) 
		addr = xdbc.in_dma;

		xdbc.flags |= XDBC_FLAGS_IN_PROCESS;

	} else {

		memset(xdbc.out_buf, 0, XDBC_MAX_PACKET);

		memcpy(xdbc.out_buf, data, size);

		memcpy_and_pad(xdbc.out_buf, XDBC_MAX_PACKET, data, size, 0);

		addr = xdbc.out_dma;

		xdbc.flags |= XDBC_FLAGS_OUT_PROCESS;

	}