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tools: usb: ffs-aio-example: Fix build error with aarch64-*-gnu-gcc toolchain(s) 

The tools/usb/aio_simple.c file when cross-compiled with
aarch64-*-gnu-gcc toolchain(s) leads to the following errors:

  aio_simple.c:30:10: fatal error: endian.h: No such file or directory
  30 | #include <endian.h>
      |          ^~~~~~~~~~

  aio_simple.c:88:14: note: (near initialization for
                      'descriptors.fs_count')
  aio_simple.c:110:14: error: initializer element is not constant
  110 |  .hs_count = htole32(3),
      |              ^~~~~~~
  aio_simple.c:110:14: note: (near initialization for
                      'descriptors.hs_count')
  aio_simple.c:124:22: error: initializer element is not constant
  124 |    .wMaxPacketSize = htole16(512),
      |                      ^~~~~~~
  aio_simple.c:124:22: note: (near initialization for
                       'descriptors.hs_descs.bulk_sink.wMaxPacketSize')

Fix these compilation issues by:
 - Switching to _DEFAULT_SOURCE:
    _BSD_SOURCE is deprecated and gives a build warning. Let's use
    _DEFAULT_SOURCE instead.
 - Currently this file uses library htole16/32 function calls.
   Replace these with equivalent 'cpu_to_le16/32' calls.

Cc: Felipe Balbi <balbi@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Link: https://lore.kernel.org/r/20221029161312.171165-1-bhupesh.sharma@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bhupesh Sharma 2022-10-29 21:43:12 +05:30 committed by Greg Kroah-Hartman
parent dced88922c
commit c5edb757ba
1 changed files with 31 additions and 13 deletions
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44
tools/usb/ffs-aio-example/simple/device_app/aio_simple.c
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@ -25,7 +25,9 @@
* For more information, please refer to <http://unlicense.org/>
*/
#define _BSD_SOURCE /* for endian.h */
/* $(CROSS_COMPILE)cc -g -o aio_simple aio_simple.c -laio */
#define _DEFAULT_SOURCE /* for endian.h */
#include <endian.h>
#include <errno.h>
@ -49,6 +51,22 @@
#define BUF_LEN 8192
/*
* cpu_to_le16/32 are used when initializing structures, a context where a
* function call is not allowed. To solve this, we code cpu_to_le16/32 in a way
* that allows them to be used when initializing structures.
*/
#if BYTE_ORDER == __LITTLE_ENDIAN
#define cpu_to_le16(x) (x)
#define cpu_to_le32(x) (x)
#else
#define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
#define cpu_to_le32(x) \
((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \
(((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))
#endif
/******************** Descriptors and Strings *******************************/
static const struct {
@ -62,12 +80,12 @@ static const struct {
} __attribute__ ((__packed__)) fs_descs, hs_descs;
} __attribute__ ((__packed__)) descriptors = {
.header = {
.magic = htole32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2),
.flags = htole32(FUNCTIONFS_HAS_FS_DESC |
.magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2),
.flags = cpu_to_le32(FUNCTIONFS_HAS_FS_DESC |
FUNCTIONFS_HAS_HS_DESC),
.length = htole32(sizeof(descriptors)),
.length = cpu_to_le32(sizeof(descriptors)),
},
.fs_count = htole32(3),
.fs_count = cpu_to_le32(3),
.fs_descs = {
.intf = {
.bLength = sizeof(descriptors.fs_descs.intf),
@ -89,7 +107,7 @@ static const struct {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
},
},
.hs_count = htole32(3),
.hs_count = cpu_to_le32(3),
.hs_descs = {
.intf = {
.bLength = sizeof(descriptors.hs_descs.intf),
@ -103,14 +121,14 @@ static const struct {
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 1 | USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = htole16(512),
.wMaxPacketSize = cpu_to_le16(512),
},
.bulk_source = {
.bLength = sizeof(descriptors.hs_descs.bulk_source),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = 2 | USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = htole16(512),
.wMaxPacketSize = cpu_to_le16(512),
},
},
};
@ -125,13 +143,13 @@ static const struct {
} __attribute__ ((__packed__)) lang0;
} __attribute__ ((__packed__)) strings = {
.header = {
.magic = htole32(FUNCTIONFS_STRINGS_MAGIC),
.length = htole32(sizeof(strings)),
.str_count = htole32(1),
.lang_count = htole32(1),
.magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC),
.length = cpu_to_le32(sizeof(strings)),
.str_count = cpu_to_le32(1),
.lang_count = cpu_to_le32(1),
},
.lang0 = {
htole16(0x0409), /* en-us */
cpu_to_le16(0x0409), /* en-us */
STR_INTERFACE,
},
};