diff options
Diffstat (limited to 'target/linux/lantiq/patches-3.18/0017-MTD-xway-fix-nand-locking.patch')
| -rw-r--r-- | target/linux/lantiq/patches-3.18/0017-MTD-xway-fix-nand-locking.patch | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.18/0017-MTD-xway-fix-nand-locking.patch b/target/linux/lantiq/patches-3.18/0017-MTD-xway-fix-nand-locking.patch new file mode 100644 index 0000000000..737469aab5 --- /dev/null +++ b/target/linux/lantiq/patches-3.18/0017-MTD-xway-fix-nand-locking.patch @@ -0,0 +1,89 @@ +From aa705c1b0860da91f2ed1a4c0b57337e6de689e1 Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Thu, 7 Aug 2014 18:55:31 +0200 +Subject: [PATCH 17/36] MTD: xway: fix nand locking + +Signed-off-by: John Crispin <blogic@openwrt.org> +--- + drivers/mtd/nand/xway_nand.c | 15 +++------------ + 1 file changed, 3 insertions(+), 12 deletions(-) + +--- a/drivers/mtd/nand/xway_nand.c ++++ b/drivers/mtd/nand/xway_nand.c +@@ -80,13 +80,16 @@ static void xway_reset_chip(struct nand_ + + 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; +@@ -99,7 +102,6 @@ static void xway_cmd_ctrl(struct mtd_inf + { + struct nand_chip *this = mtd->priv; + unsigned long nandaddr = (unsigned long) this->IO_ADDR_W; +- unsigned long flags; + + if (ctrl & NAND_CTRL_CHANGE) { + if (ctrl & NAND_CLE) +@@ -109,11 +111,9 @@ static void xway_cmd_ctrl(struct mtd_inf + } + + if (cmd != NAND_CMD_NONE) { +- spin_lock_irqsave(&ebu_lock, flags); + writeb(cmd, (void __iomem *) (nandaddr | xway_latchcmd)); + while ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0) + ; +- spin_unlock_irqrestore(&ebu_lock, flags); + } + } + +@@ -126,12 +126,9 @@ static unsigned char xway_read_byte(stru + { + struct nand_chip *this = mtd->priv; + unsigned long nandaddr = (unsigned long) this->IO_ADDR_R; +- unsigned long flags; + int ret; + +- spin_lock_irqsave(&ebu_lock, flags); + ret = ltq_r8((void __iomem *)(nandaddr | NAND_READ_DATA)); +- spin_unlock_irqrestore(&ebu_lock, flags); + + return ret; + } +@@ -140,26 +137,20 @@ static void xway_read_buf(struct mtd_inf + { + struct nand_chip *this = mtd->priv; + unsigned long nandaddr = (unsigned long) this->IO_ADDR_R; +- unsigned long flags; + int i; + +- spin_lock_irqsave(&ebu_lock, flags); + for (i = 0; i < len; i++) + buf[i] = ltq_r8((void __iomem *)(nandaddr | NAND_READ_DATA)); +- spin_unlock_irqrestore(&ebu_lock, flags); + } + + static void xway_write_buf(struct mtd_info *mtd, const u_char *buf, int len) + { + struct nand_chip *this = mtd->priv; + unsigned long nandaddr = (unsigned long) this->IO_ADDR_W; +- unsigned long flags; + int i; + +- spin_lock_irqsave(&ebu_lock, flags); + for (i = 0; i < len; i++) + ltq_w8(buf[i], (void __iomem *)(nandaddr | NAND_WRITE_DATA)); +- spin_unlock_irqrestore(&ebu_lock, flags); + } + + static int xway_nand_probe(struct platform_device *pdev) |