ar71xx: add support for linux 4.4

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48563

1 files changed, 69 insertions, 0 deletions

diff --git a/target/linux/ar71xx/patches-4.4/403-mtd_fix_cfi_cmdset_0002_status_check.patch b/target/linux/ar71xx/patches-4.4/403-mtd_fix_cfi_cmdset_0002_status_check.patch
new file mode 100644
index 0000000000..1ccce4ecec
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.4/403-mtd_fix_cfi_cmdset_0002_status_check.patch
@@ -0,0 +1,69 @@
+--- a/drivers/mtd/chips/cfi_cmdset_0002.c
++++ b/drivers/mtd/chips/cfi_cmdset_0002.c
+@@ -1632,8 +1632,8 @@ static int __xipram do_write_oneword(str
+ 			break;
+ 		}
+ 
+-		if (chip_ready(map, adr))
+-			break;
++		if (chip_good(map, adr, datum))
++			goto enable_xip;
+ 
+ 		/* Latency issues. Drop the lock, wait a while and retry */
+ 		UDELAY(map, chip, adr, 1);
+@@ -1649,6 +1649,8 @@ static int __xipram do_write_oneword(str
+ 
+ 		ret = -EIO;
+ 	}
++
++ enable_xip:
+ 	xip_enable(map, chip, adr);
+  op_done:
+ 	if (mode == FL_OTP_WRITE)
+@@ -2227,7 +2229,6 @@ static int cfi_amdstd_panic_write(struct
+ 	return 0;
+ }
+ 
+-
+ /*
+  * Handle devices with one erase region, that only implement
+  * the chip erase command.
+@@ -2291,8 +2292,8 @@ static int __xipram do_erase_chip(struct
+ 			chip->erase_suspended = 0;
+ 		}
+ 
+-		if (chip_ready(map, adr))
+-			break;
++		if (chip_good(map, adr, map_word_ff(map)))
++			goto op_done;
+ 
+ 		if (time_after(jiffies, timeo)) {
+ 			printk(KERN_WARNING "MTD %s(): software timeout\n",
+@@ -2312,6 +2313,7 @@ static int __xipram do_erase_chip(struct
+ 		ret = -EIO;
+ 	}
+ 
++ op_done:
+ 	chip->state = FL_READY;
+ 	xip_enable(map, chip, adr);
+ 	DISABLE_VPP(map);
+@@ -2380,9 +2382,9 @@ static int __xipram do_erase_oneblock(st
+ 			chip->erase_suspended = 0;
+ 		}
+ 
+-		if (chip_ready(map, adr)) {
++		if (chip_good(map, adr, map_word_ff(map))) {
+ 			xip_enable(map, chip, adr);
+-			break;
++			goto op_done;
+ 		}
+ 
+ 		if (time_after(jiffies, timeo)) {
+@@ -2404,6 +2406,7 @@ static int __xipram do_erase_oneblock(st
+ 		ret = -EIO;
+ 	}
+ 
++ op_done:
+ 	chip->state = FL_READY;
+ 	DISABLE_VPP(map);
+ 	put_chip(map, chip, adr);