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lantiq: fix nand/ebu locking 

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 40310
This commit is contained in:
John Crispin 2014-03-30 09:15:37 +00:00
parent d6a138141c
commit 561a7ef93b
1 changed files with 21 additions and 0 deletions
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21
target/linux/lantiq/patches-3.10/0104-nand.patch Normal file
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@ -0,0 +1,21 @@
Index: linux-3.10.34/drivers/mtd/nand/xway_nand.c
===================================================================
--- linux-3.10.34.orig/drivers/mtd/nand/xway_nand.c 2014-03-28 11:51:49.790953906 +0000
+++ linux-3.10.34/drivers/mtd/nand/xway_nand.c 2014-03-28 15:45:08.196369790 +0000
@@ -80,13 +80,16 @@
static void xway_select_chip(struct mtd_info *mtd, int chip)
{
+ static unsigned long csflags;
switch (chip) {
case -1:
ltq_ebu_w32_mask(NAND_CON_CE, 0, EBU_NAND_CON);
ltq_ebu_w32_mask(NAND_CON_NANDM, 0, EBU_NAND_CON);
+ spin_unlock_irqrestore(&ebu_lock, csflags);
break;
case 0:
+ spin_lock_irqsave(&ebu_lock, csflags);
ltq_ebu_w32_mask(0, NAND_CON_NANDM, EBU_NAND_CON);
ltq_ebu_w32_mask(0, NAND_CON_CE, EBU_NAND_CON);
break;