Modifications to RT5572_LinuxSTA_2.6.1.3_20121022 to get it working with actual kernels. Fix for Linux 4.1.

[Andreas Hartmann <andihartmann@freenet.de>]

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Hi,

this patch fixes RT5572_LinuxSTA_2.6.1.3_20121022 to get it working with
Linux 4.1.

W/o this patch, the driver can't read
/etc/Wireless/RT2870STA/RT2870STA.dat anymore and therefore the driver
defaults to 802.11g e.g.


Reason:
After commit 5d5d56897530 ("make new_sync_{read,write}() static")
->read() cannot be called directly any more.

Here you can find all old existing patches for other
kernel versions: [1]


Regards,
Andreas


[1]
http://news.gmane.org/find-root.php?group=gmane.linux.drivers.rt2x00.user&article=2670


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--- a/DPO_RT5572_LinuxSTA_2.6.1.3_20121022/os/linux/rt_linux.c  2015-01-29 14:40:35.891324646 +0100
+++ b/DPO_RT5572_LinuxSTA_2.6.1.3_20121022/os/linux/rt_linux.c  2015-06-28 08:10:18.556116310 +0200
@@ -1126,22 +1126,33 @@
 
 int RtmpOSFileRead(RTMP_OS_FD osfd,
 		     char *pDataPtr, int readLen) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0)
 	/* The object must have a read method */
 	if (osfd->f_op && osfd->f_op->read) {
 		return osfd->f_op->read(osfd, pDataPtr, readLen, &osfd->f_pos);
 	} else {
 		DBGPRINT(RT_DEBUG_ERROR, ("no file read method\n"));
+#else
+	if (osfd && osfd->f_mode & FMODE_CAN_READ) {
+		return __vfs_read(osfd, pDataPtr, readLen, &osfd->f_pos);
+	} else {
+		DBGPRINT(RT_DEBUG_ERROR, ("no file read method\n"));
+#endif
 		return -1;
 	}
 }
 
 int RtmpOSFileWrite(RTMP_OS_FD osfd,
 		    char *pDataPtr, int writeLen) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0)
 	return osfd->f_op->write(osfd,
 				 pDataPtr,
 				 (
 	size_t) writeLen,
 				 &osfd->f_pos);
+#else
+	return __vfs_write(osfd, pDataPtr, (size_t) writeLen, &osfd->f_pos);
+#endif
 }
 
 static inline void __RtmpOSFSInfoChange(OS_FS_INFO * pOSFSInfo,