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goldfish_pipe: don't be clever with #define offsets

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It just makes it harder to figure out which commands are being used.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Jin Qian <jinqian@android.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Bennée 2016-01-06 14:04:31 +00:00 committed by Greg Kroah-Hartman
parent bd2f348db5
commit 23c5ee21c4
1 changed files with 5 additions and 11 deletions
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16
drivers/platform/goldfish/goldfish_pipe.c
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@ -90,12 +90,6 @@
#define CMD_WRITE_BUFFER 4 /* send a user buffer to the emulator */
#define CMD_WAKE_ON_WRITE 5 /* tell the emulator to wake us when writing
is possible */
/* The following commands are related to read operations, they must be
* listed in the same order than the corresponding write ones, since we
* will use (CMD_READ_BUFFER - CMD_WRITE_BUFFER) as a special offset
* in goldfish_pipe_read_write() below.
*/
#define CMD_READ_BUFFER 6 /* receive a user buffer from the emulator */
#define CMD_WAKE_ON_READ 7 /* tell the emulator to wake us when reading
* is possible */
@ -272,8 +266,6 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer,
unsigned long irq_flags;
struct goldfish_pipe *pipe = filp->private_data;
struct goldfish_pipe_dev *dev = pipe->dev;
const int cmd_offset = is_write ? 0
: (CMD_READ_BUFFER - CMD_WRITE_BUFFER);
unsigned long address, address_end;
int ret = 0;
@ -325,7 +317,8 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer,
/* Now, try to transfer the bytes in the current page */
spin_lock_irqsave(&dev->lock, irq_flags);
if (access_with_param(dev, CMD_WRITE_BUFFER + cmd_offset,
if (access_with_param(dev,
is_write ? CMD_WRITE_BUFFER : CMD_READ_BUFFER,
address, avail, pipe, &status)) {
gf_write_ptr(pipe, dev->base + PIPE_REG_CHANNEL,
dev->base + PIPE_REG_CHANNEL_HIGH);
@ -333,7 +326,7 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer,
gf_write_ptr((void *)address,
dev->base + PIPE_REG_ADDRESS,
dev->base + PIPE_REG_ADDRESS_HIGH);
writel(CMD_WRITE_BUFFER + cmd_offset,
writel(is_write ? CMD_WRITE_BUFFER : CMD_READ_BUFFER,
dev->base + PIPE_REG_COMMAND);
status = readl(dev->base + PIPE_REG_STATUS);
}
@ -370,7 +363,8 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer,
set_bit(wakeBit, &pipe->flags);
/* Tell the emulator we're going to wait for a wake event */
goldfish_cmd(pipe, CMD_WAKE_ON_WRITE + cmd_offset);
goldfish_cmd(pipe,
is_write ? CMD_WAKE_ON_WRITE : CMD_WAKE_ON_READ);
/* Unlock the pipe, then wait for the wake signal */
mutex_unlock(&pipe->lock);