lkml.org 
[lkml]   [2023]   [Jan]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/3] usb: early: xhci-dbc: Use memcpy_and_pad()
Date
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: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
drivers/usb/early/xhci-dbc.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c
index 965a24e47c0f..341408410ed9 100644
--- a/drivers/usb/early/xhci-dbc.c
+++ b/drivers/usb/early/xhci-dbc.c
@@ -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;
}
--
2.34.1
\
 
 \ /
  Last update: 2023-03-27 00:01    [W:0.033 / U:0.676 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site