usb: gadget: f_uac2: fix endianness of 'struct cntrl_*_lay3'

BugLink: https://bugs.launchpad.net/bugs/1835972
[ Upstream commit eec24f2a0d4dc3b1d95a3ccd2feb523ede3ba775 ]

The list [1] of commits doing endianness fixes in USB subsystem is long
due to below quote from USB spec Revision 2.0 from April 27, 2000:

------------
8.1 Byte/Bit Ordering

Multiple byte fields in standard descriptors, requests, and responses
are interpreted as and moved over the bus in little-endian order, i.e.
LSB to MSB.
------------

This commit belongs to the same family.

[1] Example of endianness fixes in USB subsystem:
commit 14e1d56cbea6 ("usb: gadget: f_uac2: endianness fixes.")
commit 42370b821168 ("usb: gadget: f_uac1: endianness fixes.")
commit 63afd5cc7877 ("USB: chaoskey: fix Alea quirk on big-endian hosts")
commit 74098c4ac782 ("usb: gadget: acm: fix endianness in notifications")
commit cdd7928df0d2 ("ACM gadget: fix endianness in notifications")
commit 323ece54e076 ("cdc-wdm: fix endianness bug in debug statements")
commit e102609f1072 ("usb: gadget: uvc: Fix endianness mismatches")
       list goes on

Fixes: 132fcb460839 ("usb: gadget: Add Audio Class 2.0 Driver")
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Reviewed-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index 6954db22c2f3502497aa7b91b82b40e0690e2343..d582921f7257de4325f76102c7d86e6eda463645 100644 (file)
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -438,14 +438,14 @@ static struct usb_descriptor_header *hs_audio_desc[] = {
 };
 
 struct cntrl_cur_lay3 {
-       __u32   dCUR;
+       __le32  dCUR;
 };
 
 struct cntrl_range_lay3 {
-       __u16   wNumSubRanges;
-       __u32   dMIN;
-       __u32   dMAX;
-       __u32   dRES;
+       __le16  wNumSubRanges;
+       __le32  dMIN;
+       __le32  dMAX;
+       __le32  dRES;
 } __packed;
 
 static void set_ep_max_packet_size(const struct f_uac2_opts *uac2_opts,
@@ -703,9 +703,9 @@ in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
                memset(&c, 0, sizeof(struct cntrl_cur_lay3));
 
                if (entity_id == USB_IN_CLK_ID)
-                       c.dCUR = p_srate;
+                       c.dCUR = cpu_to_le32(p_srate);
                else if (entity_id == USB_OUT_CLK_ID)
-                       c.dCUR = c_srate;
+                       c.dCUR = cpu_to_le32(c_srate);
 
                value = min_t(unsigned, w_length, sizeof c);
                memcpy(req->buf, &c, value);
@@ -742,15 +742,15 @@ in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr)
 
        if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
                if (entity_id == USB_IN_CLK_ID)
-                       r.dMIN = p_srate;
+                       r.dMIN = cpu_to_le32(p_srate);
                else if (entity_id == USB_OUT_CLK_ID)
-                       r.dMIN = c_srate;
+                       r.dMIN = cpu_to_le32(c_srate);
                else
                        return -EOPNOTSUPP;
 
                r.dMAX = r.dMIN;
                r.dRES = 0;
-               r.wNumSubRanges = 1;
+               r.wNumSubRanges = cpu_to_le16(1);
 
                value = min_t(unsigned, w_length, sizeof r);
                memcpy(req->buf, &r, value);