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staging: goldfish: Fix pointer cast for 32 bits 

As the first argument of gf_write64() was of type unsigned long, and as
some calls to gf_write64() were casting the first argument from void *
to u64 the compiler and/or sparse were printing warnings for casts of
wrong sizes when compiling for i386.

This patch changes the type of the first argument of gf_write64() to
const void *, and update calls to the function. This change fixed the
warnings and allowed to remove casts from 3 calls to gf_write64().

In addition gf_write64() was renamed to gf_write_ptr() as the name was
misleading because it only writes 32 bits on 32 bit systems.

gf_write_dma_addr() was added to handle dma_addr_t values which is
used at drivers/staging/goldfish/goldfish_audio.c.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Senna Tschudin 2015-05-19 11:44:46 +02:00 committed by Greg Kroah-Hartman
parent e97bc8b220
commit 07d783fd83
5 changed files with 28 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/platform/goldfish/goldfish_pipe.c
View File

@ -158,8 +158,8 @@ static u32 goldfish_cmd_status(struct goldfish_pipe *pipe, u32 cmd)
struct goldfish_pipe_dev *dev = pipe->dev;
spin_lock_irqsave(&dev->lock, flags);
gf_write64((u64)(unsigned long)pipe, dev->base + PIPE_REG_CHANNEL,
dev->base + PIPE_REG_CHANNEL_HIGH);
gf_write_ptr(pipe, dev->base + PIPE_REG_CHANNEL,
dev->base + PIPE_REG_CHANNEL_HIGH);
writel(cmd, dev->base + PIPE_REG_COMMAND);
status = readl(dev->base + PIPE_REG_STATUS);
spin_unlock_irqrestore(&dev->lock, flags);
@ -172,8 +172,8 @@ static void goldfish_cmd(struct goldfish_pipe *pipe, u32 cmd)
struct goldfish_pipe_dev *dev = pipe->dev;
spin_lock_irqsave(&dev->lock, flags);
gf_write64((u64)(unsigned long)pipe, dev->base + PIPE_REG_CHANNEL,
dev->base + PIPE_REG_CHANNEL_HIGH);
gf_write_ptr(pipe, dev->base + PIPE_REG_CHANNEL,
dev->base + PIPE_REG_CHANNEL_HIGH);
writel(cmd, dev->base + PIPE_REG_COMMAND);
spin_unlock_irqrestore(&dev->lock, flags);
}
@ -327,12 +327,12 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer,
spin_lock_irqsave(&dev->lock, irq_flags);
if (access_with_param(dev, CMD_WRITE_BUFFER + cmd_offset,
address, avail, pipe, &status)) {
gf_write64((u64)(unsigned long)pipe,
dev->base + PIPE_REG_CHANNEL,
dev->base + PIPE_REG_CHANNEL_HIGH);
gf_write_ptr(pipe, dev->base + PIPE_REG_CHANNEL,
dev->base + PIPE_REG_CHANNEL_HIGH);
writel(avail, dev->base + PIPE_REG_SIZE);
gf_write64(address, dev->base + PIPE_REG_ADDRESS,
dev->base + PIPE_REG_ADDRESS_HIGH);
gf_write_ptr((void *)address,
dev->base + PIPE_REG_ADDRESS,
dev->base + PIPE_REG_ADDRESS_HIGH);
writel(CMD_WRITE_BUFFER + cmd_offset,
dev->base + PIPE_REG_COMMAND);
status = readl(dev->base + PIPE_REG_STATUS);

2
drivers/staging/goldfish/goldfish_audio.c
View File

@ -63,7 +63,7 @@ struct goldfish_audio {
#define AUDIO_READ(data, addr) (readl(data->reg_base + addr))
#define AUDIO_WRITE(data, addr, x) (writel(x, data->reg_base + addr))
#define AUDIO_WRITE64(data, addr, addr2, x) \
(gf_write64((u64)(x), data->reg_base + addr, data->reg_base+addr2))
(gf_write_dma_addr((x), data->reg_base + addr, data->reg_base+addr2))
/*
* temporary variable used between goldfish_audio_probe() and

2
drivers/staging/goldfish/goldfish_nand.c
View File

@ -87,7 +87,7 @@ static u32 goldfish_nand_cmd(struct mtd_info *mtd, enum nand_cmd cmd,
writel((u32)(addr >> 32), base + NAND_ADDR_HIGH);
writel((u32)addr, base + NAND_ADDR_LOW);
writel(len, base + NAND_TRANSFER_SIZE);
gf_write64((u64)ptr, base + NAND_DATA, base + NAND_DATA_HIGH);
gf_write_ptr(ptr, base + NAND_DATA, base + NAND_DATA_HIGH);
writel(cmd, base + NAND_COMMAND);
rv = readl(base + NAND_RESULT);
}

4
drivers/tty/goldfish.c
View File

@ -59,7 +59,7 @@ static void goldfish_tty_do_write(int line, const char *buf, unsigned count)
struct goldfish_tty *qtty = &goldfish_ttys[line];
void __iomem *base = qtty->base;
spin_lock_irqsave(&qtty->lock, irq_flags);
gf_write64((u64)buf, base + GOLDFISH_TTY_DATA_PTR,
gf_write_ptr(buf, base + GOLDFISH_TTY_DATA_PTR,
base + GOLDFISH_TTY_DATA_PTR_HIGH);
writel(count, base + GOLDFISH_TTY_DATA_LEN);
writel(GOLDFISH_TTY_CMD_WRITE_BUFFER, base + GOLDFISH_TTY_CMD);
@ -81,7 +81,7 @@ static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id)
count = tty_prepare_flip_string(&qtty->port, &buf, count);
spin_lock_irqsave(&qtty->lock, irq_flags);
gf_write64((u64)buf, base + GOLDFISH_TTY_DATA_PTR,
gf_write_ptr(buf, base + GOLDFISH_TTY_DATA_PTR,
base + GOLDFISH_TTY_DATA_PTR_HIGH);
writel(count, base + GOLDFISH_TTY_DATA_LEN);
writel(GOLDFISH_TTY_CMD_READ_BUFFER, base + GOLDFISH_TTY_CMD);

19
include/linux/goldfish.h
View File

@ -3,13 +3,24 @@
/* Helpers for Goldfish virtual platform */
static inline void gf_write64(unsigned long data,
void __iomem *portl, void __iomem *porth)
static inline void gf_write_ptr(const void *ptr, void __iomem *portl,
void __iomem *porth)
{
writel((u32)data, portl);
writel((u32)(unsigned long)ptr, portl);
#ifdef CONFIG_64BIT
writel(data>>32, porth);
writel((unsigned long)ptr >> 32, porth);
#endif
}
static inline void gf_write_dma_addr(const dma_addr_t addr,
void __iomem *portl,
void __iomem *porth)
{
writel((u32)addr, portl);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
writel(addr >> 32, porth);
#endif
}
#endif /* __LINUX_GOLDFISH_H */