From: Shiraz Hashim <shiraz.has...@st.com>
While receiving packets from FIFO sometimes the buffer provided was
nonaligned. Fix this by taking a temporary aligned buffer and then
copying the content to nonaligned buffer.
Signed-off-by: Shiraz Hashim <shiraz.has...@st.com>
Signed-off-by: Amit Virdi <amit.vi...@st.com>
---
drivers/usb/gadget/designware_udc.c | 15 ++++++++++++++-
1 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/gadget/designware_udc.c
b/drivers/usb/gadget/designware_udc.c
index d4b53a2..878123c 100644
--- a/drivers/usb/gadget/designware_udc.c
+++ b/drivers/usb/gadget/designware_udc.c
@@ -202,6 +202,7 @@ static int usbgetpckfromfifo(int epNum, u8 *bufp, u32 len)
u32 i, nw, nb;
u32 *wrdp;
u8 *bytp;
+ u32 tmp[128];
if (readl(&udc_regs_p->dev_stat) & DEV_STAT_RXFIFO_EMPTY)
return -1;
@@ -209,7 +210,12 @@ static int usbgetpckfromfifo(int epNum, u8 *bufp, u32 len)
nw = len / sizeof(u32);
nb = len % sizeof(u32);
- wrdp = (u32 *)bufp;
+ /* use tmp buf if bufp is not word aligned */
+ if ((int)bufp & 0x3)
+ wrdp = (u32 *)&tmp[0];
+ else
+ wrdp = (u32 *)bufp;
+
for (i = 0; i < nw; i++) {
writel(readl(fifo_ptr), wrdp);
wrdp++;
@@ -223,6 +229,13 @@ static int usbgetpckfromfifo(int epNum, u8 *bufp, u32 len)
}
readl(&outep_regs_p[epNum].write_done);
+ /* copy back tmp buffer to bufp if bufp is not word aligned */
+ if ((int)bufp & 0x3) {
+ bytp = (u8 *)&tmp[0];
+ for (i = 0; i < len; i++)
+ bufp[i] = bytp[i];
+ }
+
return 0;
}
--
1.7.2.2
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